Commits (20)
Amirouche Boubekki <amirouche@hypermove.net>
\ No newline at end of file
# culturia -- personal knowledge base
# Copyright © 2015 Ludovic Courtès <ludo@gnu.org>
# Copyright © 2017 ng0 <ng0@infotropique.org>
# Copyright © 2018 Amirouche Boubkki <amirouche@hypermove.net>
# This file is part of Culturia.
# Culturia is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
# Culturia is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with Culturia. If not, see <http://www.gnu.org/licenses/>.
docdir = $(datadir)/doc/culturia/
culturia/app.scm \
culturia/argon2.scm \
culturia/hmac.scm \
culturia/sha-2.scm \
culturia/web.scm \
culturia/web/decode.scm \
culturia/web/helpers.scm \
culturia/web/html.scm \
culturia/web/lorem-ipsum.scm \
culturia/web/mime-types.scm \
culturia/web/static.scm \
culturia/web/style.scm \
GOBJECTS = $(MODULES:%.scm=%.go) culturia/config.go
nobase_dist_guilemodule_DATA = $(MODULES)
nobase_nodist_guilemodule_DATA = $(GOBJECTS)
AM_V_GUILEC_0 = @echo " GUILEC" $@;
# Unset 'GUILE_LOAD_COMPILED_PATH' altogether while compiling. Otherwise, if
# $GUILE_LOAD_COMPILED_PATH contains $(moduledir), we may find .go files in
# there that are newer than the local .scm files (for instance because the
# user ran 'make install' recently). When that happens, we end up loading
# those previously-installed .go files, which may be stale, thereby breaking
# the whole thing.
# XXX: Use the C locale for when Guile lacks
# <http://git.sv.gnu.org/cgit/guile.git/commit/?h=stable-2.0&id=e2c6bf3866d1186c60bacfbd4fe5037087ee5e3f>.
$(AM_V_GUILEC)$(MKDIR_P) `dirname "$@"` ; \
$(top_builddir)/pre-inst-env \
$(GUILD) compile -L "$(top_builddir)" -L "$(top_srcdir)" \
-Wformat -Wunbound-variable -Warity-mismatch \
--target="$(host)" \
-o "$@" "$<"
# Make sure source files are installed first, so that the mtime of
# installed compiled files is greater than that of installed source
# files. See
# <http://lists.gnu.org/archive/html/guile-devel/2010-07/msg00125.html>
# for details.
guix_install_go_files = install-nobase_nodist_guilemoduleDATA
$(guix_install_go_files): install-nobase_dist_guilemoduleDATA
SCM_LOG_COMPILER = $(top_builddir)/pre-inst-env $(GUILE)
-*- mode: org -*-
Simple, easy to use with good default personal knowledge base that
allows users to interact with the rest of the world over the Internet.
Culturia wants to be for the Internet what GNOME is for the desktop.
* Development
Clone the following repository:
git clone https://framagit.org/a-guile-mind/culturia.next
Create merge requests (aka. pull requests) in framasoft's gitlab or
send patches to amirouche+dev@hypermove.net.
** 0.0 blog engine
*** easy: look up for TODO in the code
*** easy: Add a datetime library using relative name and GMT
*** easy: move to guile fibers
*** easy: redirect index to ?query=/overview
*** easy: navigation replace / with , e.g. ,signin
*** medium: improve logging
*** medium: Disable the signup form after the first signup
*** medium: Add search engine with public/private support
Search is based on culturia.one ix.scm, except that the signature must
(index uid html keywords)
Where terms will be extracted from HTML as it's already done in
culturia.one. KEYWORDS will be list of string terms that will be
indexed without preprocessing, in particular without stripping
punctuation. This will allow to use the inverted index to index UID
along specific dimensions. For instance,
- domain=example.com
- hashtag=mezangelle
Those terms will be included in the search query and will be subject
to the TF-IDF scoring which will allow for efficient queries along
those specific fields.
Maybe there is better way to go here...
*** medium: Add hashtags with search support
*** medium: Add post with markdown and hashtag support
*** medium: Add analytics
*** medium: Add props
*** medium: Add links with hashtags and search engine integration
*** medium: Add pastes with hashtags and search engine integration
Maybe recode the highlighter using combinatorix & traversi. Embed
combinatorix with poor error handling support.
*** hard: Add generic timeserie support for fail2ban and analytics
*** hard: write documentation (makeinfo or sfx?)
*** hard: Implement fail2ban
*** hard: Add atom feed to index page with search support
*** hard: choose between Scheme Styles (s²) or classic css
** 0.1
*** easy: Add guix package definition
*** medium: fix wiredtiger
**** easy: move grf3: procedure at the top of web.scm
**** medium: unique identifiers must be random 64 bits integers
*** easy: Add custom template support
*** easy: Add yearly overview
** later
*** easy: package argon2.scm
*** easy: Add support for next query parameter in /signin
*** easy: Add messages
*** medium: Add todo list
*** medium: Add issue tracker
*** medium: Add indexing of wiktionary
*** medium: Add indexing of stackoverflow
*** medium: Add indexing of wikipedia
*** medium: Add indexing of HackerNews
*** hard: Add git support
*** unknown: Add ActivityPub support
*** unknown: check if I can use and-let* from srfi-2
The follow ``/signin?next=/?query=/publish message ...'' must redirect
'next' Not sure how this interacts with the navigation form.
*** unknown: Add regular visual navigation
*** unknown: Add support graphql-like query language in templates
* Security
CSRF protections are not implemented.
Visitors do not use cookies at all. But the owner needs cookies to
sigin. It's recommended to disable javascript or to use a specific
browser session dedicated to culturia to interact with the private
part of the application, for the time being.
* culturia
culturia is an application written in GNU Guile that will allow
to share messages, posts, code and links.
* security
** CSRF protections
** timeseries
** fail2ban
* web: signin: add support for next
The follow ``/signin?next=/?query=/publish message ...'' must redirect 'next'
* add transactions to all queries
* add tags
* add post
* add link
* add code
* add search from culturia.one's ``ix.scm''
* rename handler to router
* rename index to route/index etc...
* check if I can use and-let* from srfi-2
* replace /template with /sxml
autoreconf -vif
# -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.
AC_INIT([Culturia], [0.0], [amirouche@hypermove.net], [culturia],
AM_INIT_AUTOMAKE([1.12 foreign silent-rules subdir-objects \
color-tests parallel-tests -Woverride -Wno-portability])
# Enable silent rules by default.
dnl We require pkg.m4 (from pkg-config) and guile.m4 (from Guile.)
dnl Make sure they are available.
PKG_CHECK_MODULES([GUILE], [guile-2.2 >= 2.2])
AC_PATH_PROG([GUILE], [guile])
AC_PATH_PROG([GUILD], [guild])
if test "x$GUILD" = "x"; then
AC_MSG_ERROR(['guild' binary not found; please check your Guile 2.x installation.])
PKG_CHECK_MODULES([ARGON2], [libargon2])
ARGON2_LIBDIR="`$PKG_CONFIG --variable=libdir libargon2`"
AC_CONFIG_FILES([pre-inst-env], [chmod +x pre-inst-env])
(define-module (app))
(define-module (culturia app))
(use-modules ((srfi srfi-9)))
......@@ -19,13 +19,14 @@
;; argon2 version 0~20161029-1
(define-module (argon2))
(define-module (culturia argon2))
(use-modules (ice-9 binary-ports))
(use-modules (ice-9 iconv))
(use-modules (rnrs bytevectors))
(use-modules (system foreign))
(use-modules (culturia config))
(define (urandom length)
"Return a bytevector of length LENGTH generated by /dev/urandom"
......@@ -48,7 +49,7 @@
(let ((function (dynamic-func function-name shared-object)))
(pointer->procedure return-value function arguments)))))
(define argon2 (dynamic-link* "/usr/lib/x86_64-linux-gnu/libargon2.so")) ;; TODO
(define argon2 (dynamic-link* %argon2))
(define %argon-type-argon2-d 0)
(define %argon-type-argon2-i 1)
;;;; -*- mode: Scheme; indent-tabs-mode: nil; fill-column: 80; -*-
;;;; Copyright © 2015 Ludovic Courtès <ludo@gnu.org>
;;;; Copyright © 2018 Amirouche Boubekki <amirouche@hypermove.net>
;;;; This program is free software: you can redistribute it and/or modify
;;;; it under the terms of the GNU General Public License as published by
;;;; the Free Software Foundation, either version 3 of the License, or
;;;; (at your option) any later version.
;;;; This program is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; GNU General Public License for more details.
;;;; You should have received a copy of the GNU General Public License
;;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
(define-module (culturia config))
(define-public %argon2 "@ARGON2_LIBDIR@/libargon2")
......@@ -22,7 +22,7 @@
;; RFC 2104, FIPS-198-1.
(library (hmac)
(library (culturia hmac)
(export make-hmac)
(import (rnrs))
......@@ -27,7 +27,7 @@
;; TODO: give an error if more than 2^64 / 2^128 bits are processed?
;; TODO: Optimize. Should be simple enough with the help of a profiler.
(library (sha-2)
(library (culturia sha-2)
(export make-sha-224 sha-224-update! sha-224-finish! sha-224-clear!
sha-224 sha-224-copy sha-224-finish sha-224-length
sha-224-copy-hash! sha-224-128-copy-hash!
......@@ -56,13 +56,13 @@
sha-512-hash=? sha-512-128-hash=?
(import (rnrs)
(culturia hmac))
(define (sha-224-length) 224/8)
(define (sha-256-length) 256/8)
(define (sha-384-length) 384/8)
(define (sha-512-length) 512/8)
(define (vector-copy x) (vector-map (lambda (i) i) x))
(define (ror32 n count)
# -*- scheme -*-
exec guile -L $(pwd) -e '(@ (web) main)' -s "$0" "$@"
;;; Copyright © 2014 David Thompson <davet@gnu.org>
;;; Copyright © 2015-2018 Amirouche Boubekki <amirouche@hypermove.net>
......@@ -17,7 +13,7 @@ exec guile -L $(pwd) -e '(@ (web) main)' -s "$0" "$@"
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
(define-module (web))
(define-module (culturia web))
;; stdlib
(use-modules ((ice-9 match)))
......@@ -34,19 +30,20 @@ exec guile -L $(pwd) -e '(@ (web) main)' -s "$0" "$@"
(use-modules ((wiredtiger wiredtiger)))
;; wanna be guile modules
(use-modules ((web decode)))
(use-modules ((web helpers)))
(use-modules ((web html)))
(use-modules ((web lorem-ipsum)))
(use-modules ((web mime-types)))
(use-modules ((web static)))
(use-modules ((web style)))
(use-modules ((web validate)))
(use-modules ((culturia web decode)))
(use-modules ((culturia web helpers)))
(use-modules ((culturia web html)))
(use-modules ((culturia web lorem-ipsum)))
(use-modules ((culturia web mime-types)))
(use-modules ((culturia web static)))
(use-modules ((culturia web style)))
(use-modules ((culturia web validate)))
;; local
(use-modules ((sha-2)))
(use-modules ((argon2)))
(use-modules ((app)))
(use-modules ((culturia sha-2)))
(use-modules ((culturia argon2)))
(use-modules ((culturia app)))
(setlocale LC_ALL "")
......@@ -191,59 +188,26 @@ exec guile -L $(pwd) -e '(@ (web) main)' -s "$0" "$@"
(define (request-query request)
(and=> ((compose uri-query request-uri) request) decode))
(define (message-publish message user)
(if (not user)
(redirect "/signin")
(redirect (string-append "/message/create?body=" (uri-encode message)))))
(define (query-message-create body user)
(let ((message (grf3:save
(grf3:create-vertex `((type . item)
(subtype . message)
(created-at . ,(current-time))
(body . ,body))))))
(grf3:save (grf3:create-edge message user `((type . created-by))))
(define (route/message-create/sxml body)
(template "message-create"
`(form (@ (method "POST"))
(div (@ (form "form-field")) (textarea (@ (name "body")) ,body))
,(form/submit "submit"))))
(define (route/message-create/get app request)
(let ((user (request-user request app)))
(let ((body (ref (request-query request) "body")))
(if (not body)
(redirect "/")
(sxml->response (route/message-create/sxml (car body)))))))
(define (not-empty value)
(and (or (not value)
(eq? (string-length (car value)) 0))
"must not be empty."))
(define %message-validator `(("body" . ,not-empty)))
(define (route/message-create/post app request body)
(let ((user (request-user request app)))
(let ((form (decode body)))
(if (null? (validate %message-validator form))
(let ((message (query-message-create (ref form "body") user)))
(redirect (format #f "/item/~a/" (grf3:vertex-uid message))))
(redirect "/")))))
(define (query->maybe-response query user)
(if (or (not query) (null? query))
(values #f #f)
(match (string-split (car query) #\space)
(("/message" "publish" message ...)
(message-publish (string-join message " ") user))
(match query
(("/signin") (redirect "/signin"))
(("/signup") (redirect "/signup")))))
(define (index app request)
(define* (navigation/sxml #:key value autofocus)
`(form (@ (id "navigation")
(method "GET")
(action "/"))
(input (@ (id "query")
(name "query")
(type "text")
(value ,(or value ""))
,@(if autofocus '((autofocus "")) '())))
(input (@ (type "submit")
(value "submit")))))
(define (route/index app request)
(let ((query (assoc-ref (request-query request) "query"))
(user (request-user request app)))
(call-with-values (lambda () (query->maybe-response query user))
......@@ -253,25 +217,20 @@ exec guile -L $(pwd) -e '(@ (web) main)' -s "$0" "$@"
(template "overview"
`(,(sxml/maybe (and user `((p "Héllo " ,(grf3:vertex-ref user 'user/username)))))
(form (@ (id "navigation"))
(input (@ (id "query")
(name "query")
(type "text")
(autofocus #t)))
(input (@ (type "submit")
(value "submit"))))
,(navigation/sxml #:autofocus #t)
(div (@ (id "overview-intro"))
,(lorem-ipsum 100))
,(map random-item (iota 10))))))))))
;;; form helpers
(define (form/input type name label value error)
(define* (form/input type name label value error #:key autofocus)
`(div (@ (class ,(make-class `(("form-field" . #t)
("error" . ,error)))))
(p (label (@ (for ,name)) ,label)
(input (@ (type ,type)
(id ,name)
,@(if autofocus '((autofocus "")) '())
(name ,name)
(value ,(if value (car value) ""))))
,(sxml/maybe (and error `(p (@ (class "error")) ,error))))))
......@@ -285,15 +244,17 @@ exec guile -L $(pwd) -e '(@ (web) main)' -s "$0" "$@"
(define (query-user-by-username username)
"Return the vertex associated with USERNAME otherwise #f."
(let ((out (grf3:find 'user/username username)))
(if (null? out)
(car out)))) ;; XXX: (user/username . username) must be unique
(let ((out (grf3:find 'user/username username)))
(if (null? out)
(car out))))) ;; XXX: (user/username . username) must be unique
(define (query-user-by-uid uid)
(and=> (grf3:get uid)
(lambda (user)
(and (eq? (grf3:vertex-ref user 'type) 'user) user))))
(and=> (grf3:get uid)
(lambda (user)
(and (eq? (grf3:vertex-ref user 'type) 'user) user)))))
(define (request-user request app)
(and=> (assq-ref (request-cookies request) 'token)
......@@ -303,24 +264,25 @@ exec guile -L $(pwd) -e '(@ (web) main)' -s "$0" "$@"
;;; signin
(define (signin/template values errors)
(define (signin/sxml values errors)
(template "signin"
`(form (@ (method "POST"))
(h2 "Sign in")
,(form/input "text"
(ref values "username")
(ref errors "username"))
,(form/input "password"
(ref errors "password"))
,(form/submit "submit"))))
(define (signin/get request)
(sxml->response (signin/template '() '())))
`(,(navigation/sxml #:value "/signin")
(form (@ (method "POST"))
,(form/input "text"
(ref values "username")
(ref errors "username")
#:autofocus #t)
,(form/input "password"
(ref errors "password"))
,(form/submit "submit")))))
(define (route/signin/get request)
(sxml->response (signin/sxml '() '())))
(define (required value)
(and (or (not value)
......@@ -352,7 +314,7 @@ exec guile -L $(pwd) -e '(@ (web) main)' -s "$0" "$@"
;; nowhere else, in particular it MUST NOT appear in urls.
(string-sign (grf3:vertex-uid user) (app-pepper app)))
(define (signin/post app request body)
(define (route/signin/post app request body)
(let ((form (decode body)))
(let ((errors (signin/form-validate form)))
(if (null? errors)
......@@ -364,21 +326,22 @@ exec guile -L $(pwd) -e '(@ (web) main)' -s "$0" "$@"
(cookies `((token . ,token))))
(redirect "/" #:cookies cookies))
(signin/template form `(("username" . "wrong username?")
(signin/sxml form `(("username" . "wrong username?")
("password" . "wrong password?"))))))
(sxml->response (signin/template form errors))))))
(sxml->response (signin/sxml form errors))))))
;;; signup
(define (signup/template values errors)
(define (signup/sxml values errors)
(template "signup"
`(form (@ (method "POST"))
(h2 "Sign up")
`(,(navigation/sxml #:value "/signup")
(form (@ (method "POST"))
,(form/input "text"
(ref values "username")
(ref errors "username"))
(ref errors "username")
#:autofocus #t)
,(form/input "password"
......@@ -389,11 +352,11 @@ exec guile -L $(pwd) -e '(@ (web) main)' -s "$0" "$@"
(ref errors "confirmation"))
,(form/submit "submit"))))
,(form/submit "submit")))))
(define (signup/get request)
(sxml->response (signup/template '() '())))
(define (route/signup/get request)
(sxml->response (signup/sxml '() '())))
(define (username-valid? username)
(and (or (not username)
......@@ -457,7 +420,8 @@ exec guile -L $(pwd) -e '(@ (web) main)' -s "$0" "$@"
(define (query-single-user?)
(eq? (length (fs:find 'type 'user)) 1))
(eq? (length (fs:find 'type 'user)) 1)))
(define (app-init user)
"Initialize the application with USER as superuser. Return the app
......@@ -482,7 +446,7 @@ user vertex"
(app-init user))
(define (signup/post app request body)
(define (route/signup/post app request body)
(let ((form (decode body)))
(let ((errors (signup/form-validate form)))
(if (null? errors)
......@@ -491,9 +455,9 @@ user vertex"
(car (ref form "username"))
(car (ref form "password")))
(redirect "/signin"))
(sxml->response (signup/template form errors))))))
(sxml->response (signup/sxml form errors))))))
(define (handler app request body)
(define (router app request body)
(log-debug "~a ~a" (request-method request) (uri-path (request-uri request)))
;; TODO: only do it in debug mode
......@@ -501,18 +465,15 @@ user vertex"
(lambda (user)
(log-debug "user is ~s" (grf3:vertex-ref user 'user/username))))
(match (cons (request-method request) (request-path-components request))
('(GET) (index app request))
('(GET "signin") (signin/get request))
('(POST "signin") (signin/post app request body))
('(GET "signup") (signup/get request))
('(POST "signup") (signup/post app request body))
('(GET "message" "create") (route/message-create/get app request))
('(POST "message" "create") (route/message-create/post app request body))
('(GET) (route/index app request))
('(GET "signin") (route/signin/get request))
('(POST "signin") (route/signin/post app request body))
('(GET "signup") (route/signup/get request))
('(POST "signup") (route/signup/post app request body))
(('GET "static" path ...) (render-static-asset path))
(_ (not-found (uri-path (request-uri request)))))))
(define-public (main _)
(define-public (run-culturia app)
(format #t "Server running @ http://localhost:8080\n")
(let ((app (make-app "super-secret-string"))) ;; TODO: make it a fluid
(with-env (env-open* "wt" (list *feature-space*) "create,log=(enabled=true)")
(run-server (lambda (request body) (handler app request body))))))
(run-server (lambda (request body) (router app request body)))))
......@@ -12,7 +12,7 @@
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
(define-module (web decode))
(define-module (culturia web decode))
(use-modules (ice-9 match))
(use-modules (rnrs bytevectors))
......@@ -12,7 +12,7 @@
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
(define-module (web helpers))
(define-module (culturia web helpers))
;; stdlib
(use-modules ((web request)))
......@@ -20,7 +20,7 @@
(use-modules ((web uri)))
;; local
(use-modules ((web html)))
(use-modules ((culturia web html)))
;;; helpers
......@@ -19,7 +19,7 @@
;; - 2017-XX-XX: add support for script tags
(define-module (web html))
(define-module (culturia web html))
(use-modules (ice-9 rdelim))
(use-modules (sxml simple))
(define-module (web lorem-ipsum))
(define-module (culturia web lorem-ipsum))
(define (newline? char)
......@@ -13,7 +13,7 @@
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
(define-module (web mime-types))
(define-module (culturia web mime-types))
;; stdlib
(use-modules (ice-9 hash-table))
......@@ -13,14 +13,14 @@
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
(define-module (web static))
(define-module (culturia web static))
;; stdlib
(use-modules (ice-9 binary-ports))
;; local
(use-modules (web mime-types))
(use-modules (web helpers))
(use-modules (culturia web mime-types))
(use-modules (culturia web helpers))
;;; static assets rendering
(define-module (web style))
(define-module (culturia web style))
(use-modules ((ice-9 match)))
(define-module (web validate))
(define-module (culturia web validate))
(use-modules ((srfi srfi-1)))
# This Makefile.am is in the public domain
docdir = $(datadir)/doc/culturia/
infoimagedir = $(infodir)/images
AM_MAKEINFOHTMLFLAGS = --no-split --css-ref=docstyle.css
info_TEXINFOS = \
gnunet_TEXINFOS = \
fdl-1.3.texi \
htmlxref.cnf \
run-gendocs.sh \
fdl-1.3.cps \
@mkdir -p $(DESTDIR)/$(docdir)
@cp -r manual $(DESTDIR)/$(docdir)
# TODO: Add more to clean.
@rm culturia.pdf
@rm culturia.html
@rm culturia.info
@rm culturia.info-1
@rm culturia.info-2
@rm culturia.info-3
@rm -r culturia.t2p
@rm -r manual
@c The GNU Affero General Public License.
@center Version 3, 19 November 2007
@c This file is intended to be included within another document,
@c hence no sectioning command or @node.
Copyright @copyright{} 2007 Free Software Foundation, Inc. @url{https://fsf.org/}
Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.
@end display
@heading Preamble
The GNU Affero General Public License is a free, copyleft license
for software and other kinds of works, specifically designed to ensure
cooperation with the community in the case of network server software.
The licenses for most software and other practical works are
designed to take away your freedom to share and change the works. By
contrast, our General Public Licenses are intended to guarantee your
freedom to share and change all versions of a program--to make sure it
remains free software for all its users.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs, and that you know you can do these things.
Developers that use our General Public Licenses protect your rights
with two steps: (1) assert copyright on the software, and (2) offer
you this License which gives you legal permission to copy, distribute
and/or modify the software.
A secondary benefit of defending all users' freedom is that
improvements made in alternate versions of the program, if they
receive widespread use, become available for other developers to
incorporate. Many developers of free software are heartened and
encouraged by the resulting cooperation. However, in the case of
software used on network servers, this result may fail to come about.
The GNU General Public License permits making a modified version and
letting the public access it on a server without ever releasing its
source code to the public.
The GNU Affero General Public License is designed specifically to
ensure that, in such cases, the modified source code becomes available
to the community. It requires the operator of a network server to
provide the source code of the modified version running there to the
users of that server. Therefore, public use of a modified version, on
a publicly accessible server, gives the public access to the source
code of the modified version.
An older license, called the Affero General Public License and
published by Affero, was designed to accomplish similar goals. This is
a different license, not a version of the Affero GPL, but Affero has
released a new version of the Affero GPL which permits relicensing under
this license.
The precise terms and conditions for copying, distribution and
modification follow.
@enumerate 0
@item Definitions.
``This License'' refers to version 3 of the GNU Affero General Public License.
``Copyright'' also means copyright-like laws that apply to other kinds
of works, such as semiconductor masks.
``The Program'' refers to any copyrightable work licensed under this
License. Each licensee is addressed as ``you''. ``Licensees'' and
``recipients'' may be individuals or organizations.
To ``modify'' a work means to copy from or adapt all or part of the work
in a fashion requiring copyright permission, other than the making of
an exact copy. The resulting work is called a ``modified version'' of
the earlier work or a work ``based on'' the earlier work.
A ``covered work'' means either the unmodified Program or a work based
on the Program.
To ``propagate'' a work means to do anything with it that, without
permission, would make you directly or secondarily liable for
infringement under applicable copyright law, except executing it on a
computer or modifying a private copy. Propagation includes copying,
distribution (with or without modification), making available to the
public, and in some countries other activities as well.
To ``convey'' a work means any kind of propagation that enables other
parties to make or receive copies. Mere interaction with a user
through a computer network, with no transfer of a copy, is not
An interactive user interface displays ``Appropriate Legal Notices'' to
the extent that it includes a convenient and prominently visible
feature that (1) displays an appropriate copyright notice, and (2)
tells the user that there is no warranty for the work (except to the
extent that warranties are provided), that licensees may convey the
work under this License, and how to view a copy of this License. If
the interface presents a list of user commands or options, such as a
menu, a prominent item in the list meets this criterion.
@item Source Code.
The ``source code'' for a work means the preferred form of the work for
making modifications to it. ``Object code'' means any non-source form
of a work.
A ``Standard Interface'' means an interface that either is an official
standard defined by a recognized standards body, or, in the case of
interfaces specified for a particular programming language, one that
is widely used among developers working in that language.
The ``System Libraries'' of an executable work include anything, other
than the work as a whole, that (a) is included in the normal form of
packaging a Major Component, but which is not part of that Major
Component, and (b) serves only to enable use of the work with that
Major Component, or to implement a Standard Interface for which an
implementation is available to the public in source code form. A
``Major Component'', in this context, means a major essential component
(kernel, window system, and so on) of the specific operating system
(if any) on which the executable work runs, or a compiler used to
produce the work, or an object code interpreter used to run it.
The ``Corresponding Source'' for a work in object code form means all
the source code needed to generate, install, and (for an executable
work) run the object code and to modify the work, including scripts to
control those activities. However, it does not include the work's
System Libraries, or general-purpose tools or generally available free
programs which are used unmodified in performing those activities but
which are not part of the work. For example, Corresponding Source
includes interface definition files associated with source files for
the work, and the source code for shared libraries and dynamically
linked subprograms that the work is specifically designed to require,
such as by intimate data communication or control flow between those
subprograms and other parts of the work.
The Corresponding Source need not include anything that users can
regenerate automatically from other parts of the Corresponding Source.
The Corresponding Source for a work in source code form is that same
@item Basic Permissions.
All rights granted under this License are granted for the term of
copyright on the Program, and are irrevocable provided the stated
conditions are met. This License explicitly affirms your unlimited
permission to run the unmodified Program. The output from running a
covered work is covered by this License only if the output, given its
content, constitutes a covered work. This License acknowledges your
rights of fair use or other equivalent, as provided by copyright law.
You may make, run and propagate covered works that you do not convey,
without conditions so long as your license otherwise remains in force.
You may convey covered works to others for the sole purpose of having
them make modifications exclusively for you, or provide you with
facilities for running those works, provided that you comply with the
terms of this License in conveying all material for which you do not
control copyright. Those thus making or running the covered works for
you must do so exclusively on your behalf, under your direction and
control, on terms that prohibit them from making any copies of your
copyrighted material outside their relationship with you.
Conveying under any other circumstances is permitted solely under the
conditions stated below. Sublicensing is not allowed; section 10
makes it unnecessary.
@item Protecting Users' Legal Rights From Anti-Circumvention Law.
No covered work shall be deemed part of an effective technological
measure under any applicable law fulfilling obligations under article
11 of the WIPO copyright treaty adopted on 20 December 1996, or
similar laws prohibiting or restricting circumvention of such
When you convey a covered work, you waive any legal power to forbid
circumvention of technological measures to the extent such
circumvention is effected by exercising rights under this License with
respect to the covered work, and you disclaim any intention to limit
operation or modification of the work as a means of enforcing, against
the work's users, your or third parties' legal rights to forbid
circumvention of technological measures.
@item Conveying Verbatim Copies.
You may convey verbatim copies of the Program's source code as you
receive it, in any medium, provided that you conspicuously and
appropriately publish on each copy an appropriate copyright notice;
keep intact all notices stating that this License and any
non-permissive terms added in accord with section 7 apply to the code;
keep intact all notices of the absence of any warranty; and give all
recipients a copy of this License along with the Program.
You may charge any price or no price for each copy that you convey,
and you may offer support or warranty protection for a fee.
@item Conveying Modified Source Versions.
You may convey a work based on the Program, or the modifications to
produce it from the Program, in the form of source code under the
terms of section 4, provided that you also meet all of these
@enumerate a
The work must carry prominent notices stating that you modified it,
and giving a relevant date.
The work must carry prominent notices stating that it is released
under this License and any conditions added under section 7. This
requirement modifies the requirement in section 4 to ``keep intact all
You must license the entire work, as a whole, under this License to
anyone who comes into possession of a copy. This License will
therefore apply, along with any applicable section 7 additional terms,
to the whole of the work, and all its parts, regardless of how they
are packaged. This License gives no permission to license the work in
any other way, but it does not invalidate such permission if you have
separately received it.
If the work has interactive user interfaces, each must display
Appropriate Legal Notices; however, if the Program has interactive
interfaces that do not display Appropriate Legal Notices, your work
need not make them do so.
@end enumerate
A compilation of a covered work with other separate and independent
works, which are not by their nature extensions of the covered work,
and which are not combined with it such as to form a larger program,
in or on a volume of a storage or distribution medium, is called an
``aggregate'' if the compilation and its resulting copyright are not
used to limit the access or legal rights of the compilation's users
beyond what the individual works permit. Inclusion of a covered work
in an aggregate does not cause this License to apply to the other
parts of the aggregate.
@item Conveying Non-Source Forms.
You may convey a covered work in object code form under the terms of
sections 4 and 5, provided that you also convey the machine-readable
Corresponding Source under the terms of this License, in one of these
@enumerate a
Convey the object code in, or embodied in, a physical product
(including a physical distribution medium), accompanied by the
Corresponding Source fixed on a durable physical medium customarily
used for software interchange.
Convey the object code in, or embodied in, a physical product
(including a physical distribution medium), accompanied by a written
offer, valid for at least three years and valid for as long as you
offer spare parts or customer support for that product model, to give
anyone who possesses the object code either (1) a copy of the
Corresponding Source for all the software in the product that is
covered by this License, on a durable physical medium customarily used
for software interchange, for a price no more than your reasonable
cost of physically performing this conveying of source, or (2) access
to copy the Corresponding Source from a network server at no charge.
Convey individual copies of the object code with a copy of the written
offer to provide the Corresponding Source. This alternative is
allowed only occasionally and noncommercially, and only if you
received the object code with such an offer, in accord with subsection
Convey the object code by offering access from a designated place
(gratis or for a charge), and offer equivalent access to the
Corresponding Source in the same way through the same place at no
further charge. You need not require recipients to copy the
Corresponding Source along with the object code. If the place to copy
the object code is a network server, the Corresponding Source may be
on a different server (operated by you or a third party) that supports
equivalent copying facilities, provided you maintain clear directions
next to the object code saying where to find the Corresponding Source.
Regardless of what server hosts the Corresponding Source, you remain
obligated to ensure that it is available for as long as needed to
satisfy these requirements.
Convey the object code using peer-to-peer transmission, provided you
inform other peers where the object code and Corresponding Source of
the work are being offered to the general public at no charge under
subsection 6d.
@end enumerate
A separable portion of the object code, whose source code is excluded
from the Corresponding Source as a System Library, need not be
included in conveying the object code work.
A ``User Product'' is either (1) a ``consumer product'', which means any
tangible personal property which is normally used for personal,
family, or household purposes, or (2) anything designed or sold for
incorporation into a dwelling. In determining whether a product is a
consumer product, doubtful cases shall be resolved in favor of
coverage. For a particular product received by a particular user,
``normally used'' refers to a typical or common use of that class of
product, regardless of the status of the particular user or of the way
in which the particular user actually uses, or expects or is expected
to use, the product. A product is a consumer product regardless of
whether the product has substantial commercial, industrial or
non-consumer uses, unless such uses represent the only significant
mode of use of the product.
``Installation Information'' for a User Product means any methods,
procedures, authorization keys, or other information required to
install and execute modified versions of a covered work in that User
Product from a modified version of its Corresponding Source. The
information must suffice to ensure that the continued functioning of
the modified object code is in no case prevented or interfered with
solely because modification has been made.
If you convey an object code work under this section in, or with, or
specifically for use in, a User Product, and the conveying occurs as
part of a transaction in which the right of possession and use of the
User Product is transferred to the recipient in perpetuity or for a
fixed term (regardless of how the transaction is characterized), the
Corresponding Source conveyed under this section must be accompanied
by the Installation Information. But this requirement does not apply
if neither you nor any third party retains the ability to install
modified object code on the User Product (for example, the work has
been installed in ROM).
The requirement to provide Installation Information does not include a
requirement to continue to provide support service, warranty, or
updates for a work that has been modified or installed by the
recipient, or for the User Product in which it has been modified or
installed. Access to a network may be denied when the modification
itself materially and adversely affects the operation of the network
or violates the rules and protocols for communication across the
Corresponding Source conveyed, and Installation Information provided,
in accord with this section must be in a format that is publicly
documented (and with an implementation available to the public in
source code form), and must require no special password or key for
unpacking, reading or copying.
@item Additional Terms.
``Additional permissions'' are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
that they are valid under applicable law. If additional permissions
apply only to part of the Program, that part may be used separately
under those permissions, but the entire Program remains governed by
this License without regard to the additional permissions.
When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part of
it. (Additional permissions may be written to require their own
removal in certain cases when you modify the work.) You may place
additional permissions on material, added by you to a covered work,
for which you have or can give appropriate copyright permission.
Notwithstanding any other provision of this License, for material you
add to a covered work, you may (if authorized by the copyright holders
of that material) supplement the terms of this License with terms:
@enumerate a
Disclaiming warranty or limiting liability differently from the terms
of sections 15 and 16 of this License; or
Requiring preservation of specified reasonable legal notices or author
attributions in that material or in the Appropriate Legal Notices
displayed by works containing it; or
Prohibiting misrepresentation of the origin of that material, or
requiring that modified versions of such material be marked in
reasonable ways as different from the original version; or
Limiting the use for publicity purposes of names of licensors or
authors of the material; or
Declining to grant rights under trademark law for use of some trade
names, trademarks, or service marks; or
Requiring indemnification of licensors and authors of that material by
anyone who conveys the material (or modified versions of it) with
contractual assumptions of liability to the recipient, for any
liability that these contractual assumptions directly impose on those
licensors and authors.
@end enumerate
All other non-permissive additional terms are considered ``further
restrictions'' within the meaning of section 10. If the Program as you
received it, or any part of it, contains a notice stating that it is
governed by this License along with a term that is a further
restriction, you may remove that term. If a license document contains
a further restriction but permits relicensing or conveying under this
License, you may add to a covered work material governed by the terms
of that license document, provided that the further restriction does
not survive such relicensing or conveying.
If you add terms to a covered work in accord with this section, you
must place, in the relevant source files, a statement of the
additional terms that apply to those files, or a notice indicating
where to find the applicable terms.
Additional terms, permissive or non-permissive, may be stated in the
form of a separately written license, or stated as exceptions; the
above requirements apply either way.
@item Termination.
You may not propagate or modify a covered work except as expressly
provided under this License. Any attempt otherwise to propagate or
modify it is void, and will automatically terminate your rights under
this License (including any patent licenses granted under the third
paragraph of section 11).
However, if you cease all violation of this License, then your license
from a particular copyright holder is reinstated (a) provisionally,
unless and until the copyright holder explicitly and finally
terminates your license, and (b) permanently, if the copyright holder
fails to notify you of the violation by some reasonable means prior to
60 days after the cessation.
Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
received notice of violation of this License (for any work) from that
copyright holder, and you cure the violation prior to 30 days after
your receipt of the notice.
Termination of your rights under this section does not terminate the
licenses of parties who have received copies or rights from you under
this License. If your rights have been terminated and not permanently
reinstated, you do not qualify to receive new licenses for the same
material under section 10.
@item Acceptance Not Required for Having Copies.
You are not required to accept this License in order to receive or run
a copy of the Program. Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance. However,
nothing other than this License grants you permission to propagate or
modify any covered work. These actions infringe copyright if you do
not accept this License. Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.
@item Automatic Licensing of Downstream Recipients.
Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License. You are not responsible
for enforcing compliance by third parties with this License.
An ``entity transaction'' is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an
organization, or merging organizations. If propagation of a covered
work results from an entity transaction, each party to that
transaction who receives a copy of the work also receives whatever
licenses to the work the party's predecessor in interest had or could
give under the previous paragraph, plus a right to possession of the
Corresponding Source of the work from the predecessor in interest, if
the predecessor has it or can get it with reasonable efforts.
You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License. For example, you may
not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
(including a cross-claim or counterclaim in a lawsuit) alleging that
any patent claim is infringed by making, using, selling, offering for
sale, or importing the Program or any portion of it.
@item Patents.
A ``contributor'' is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based. The
work thus licensed is called the contributor's ``contributor version''.
A contributor's ``essential patent claims'' are all patent claims owned
or controlled by the contributor, whether already acquired or
hereafter acquired, that would be infringed by some manner, permitted
by this License, of making, using, or selling its contributor version,
but do not include claims that would be infringed only as a
consequence of further modification of the contributor version. For
purposes of this definition, ``control'' includes the right to grant
patent sublicenses in a manner consistent with the requirements of
this License.
Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims, to
make, use, sell, offer for sale, import and otherwise run, modify and
propagate the contents of its contributor version.
In the following three paragraphs, a ``patent license'' is any express
agreement or commitment, however denominated, not to enforce a patent
(such as an express permission to practice a patent or covenant not to
sue for patent infringement). To ``grant'' such a patent license to a
party means to make such an agreement or commitment not to enforce a
patent against the party.
If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
publicly available network server or other readily accessible means,
then you must either (1) cause the Corresponding Source to be so
available, or (2) arrange to deprive yourself of the benefit of the
patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients. ``Knowingly relying'' means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.
If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of, a
covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate, modify
or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.
A patent license is ``discriminatory'' if it does not include within the
scope of its coverage, prohibits the exercise of, or is conditioned on
the non-exercise of one or more of the rights that are specifically
granted under this License. You may not convey a covered work if you
are a party to an arrangement with a third party that is in the
business of distributing software, under which you make payment to the
third party based on the extent of your activity of conveying the
work, and under which the third party grants, to any of the parties
who would receive the covered work from you, a discriminatory patent
license (a) in connection with copies of the covered work conveyed by
you (or copies made from those copies), or (b) primarily for and in
connection with specific products or compilations that contain the
covered work, unless you entered into that arrangement, or that patent
license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
@item No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey
a covered work so as to satisfy simultaneously your obligations under
this License and any other pertinent obligations, then as a
consequence you may not convey it at all. For example, if you agree
to terms that obligate you to collect a royalty for further conveying
from those to whom you convey the Program, the only way you could
satisfy both those terms and this License would be to refrain entirely
from conveying the Program.
@item Remote Network Interaction; Use with the GNU General Public License.
Notwithstanding any other provision of this License, if you modify the
Program, your modified version must prominently offer all users interacting
with it remotely through a computer network (if your version supports such
interaction) an opportunity to receive the Corresponding Source of your
version by providing access to the Corresponding Source from a network
server at no charge, through some standard or customary means of
facilitating copying of software. This Corresponding Source shall include
the Corresponding Source for any work covered by version 3 of the GNU
General Public License that is incorporated pursuant to the following
Notwithstanding any other provision of this License, you have permission to
link or combine any covered work with a work licensed under version 3 of
the GNU General Public License into a single combined work, and to convey
the resulting work. The terms of this License will continue to apply to
the part which is the covered work, but the work with which it is combined
will remain governed by version 3 of the GNU General Public License.
@item Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions
of the GNU Affero General Public License from time to time. Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies that a certain numbered version of the GNU Affero General Public
License ``or any later version'' applies to it, you have the option of
following the terms and conditions either of that numbered version or
of any later version published by the Free Software Foundation. If
the Program does not specify a version number of the GNU Affero General
Public License, you may choose any version ever published by the Free
Software Foundation.
If the Program specifies that a proxy can decide which future versions
of the GNU Affero General Public License can be used, that proxy's public
statement of acceptance of a version permanently authorizes you to
choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
@item Disclaimer of Warranty.
@item Limitation of Liability.
@item Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
@end enumerate
@heading How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the ``copyright'' line and a pointer to where the full notice is found.
@var{one line to give the program's name and a brief idea of what it does.}
Copyright (C) @var{year} @var{name of author}
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see @url{https://www.gnu.org/licenses/}.
@end smallexample
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a ``Source'' link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a ``copyright disclaimer'' for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
\input texinfo
@c -*-texinfo-*-
@c %**start of header
@setfilename culturia.info
@documentencoding UTF-8
@settitle Culturia Reference Manual
@exampleindent 2
@urefbreakstyle before
@c %**end of header
@include version.texi
Copyright @copyright{} 2018
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with no
Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A
copy of the license is included in the section entitled ``GNU Free
Documentation License''.
A copy of the license is also available from the Free Software
Foundation Web site at @url{http://www.gnu.org/licenses/fdl.html}.
Alternately, this document is also available under the General
Public License, version 3 or later, as published by the Free Software
Foundation. A copy of the license is included in the section entitled
``GNU General Public License''.
A copy of the license is also available from the Free Software
Foundation Web site at @url{http://www.gnu.org/licenses/gpl.html}.
@end copying
@dircategory Networking
* Culturia: (culturia). Personal Knowledge Base
@end direntry