Fix problems with building cantor without LANG environment variable

BUG: 410802
FIXED-IN: 19.12
(cherry picked from commit febeff84)

thirdparty/CMakeLists.txt

@@ -7,7 +7,7 @@ set (DISCOUNT_ONLY_LIBRARY ON)
 set (DISCOUNT_MAKE_INSTALL OFF)
 ExternalProject_Add(
     discount_project
-    URL ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/discount-2.2.6-patched.tar
+    URL ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/discount-2.2.6-patched
     SOURCE_SUBDIR cmake
     CMAKE_ARGS DISCOUNT_ONLY_LIBRARY DISCOUNT_MAKE_INSTALL
     CMAKE_CACHE_ARGS "-DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=true"

thirdparty/README.md

+## 3rd party libraries
+
+This folder contains (patched) versions of libraries and files Cantor depends on.
+
+
+## DISCOUNT
+
+DISCOUNT is a implementation of Markdown markup language ([link](https://github.com/Orc/discount)).
+
+The version included here provides two additional patches:
+
+* Better LaTeX support: `$` math delimiter and `mkd_e_latex` callback (https://github.com/Orc/discount/pull/214)
+
+* Better recognition of the mathematical expressions between $...$, $$...$$
+
+
+## standalone.cls
+This file provides the LaTeX class and package 'standalone' ([link](https://ctan.org/tex-archive/macros/latex/contrib/standalone)),
+which allows TeX pictures or other TeX code in sub-files to be compiled standalone or as part of a main document.
+This package is used for the rendering of mathematical LaTeX expressions embedded in the Cantor's worksheet.

thirdparty/discount-2.2.6-patched/COPYRIGHT

+->Copyright (C) 2007 David Loren Parsons.  
+All rights reserved.<-
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+1.  Redistributions of works must retain the original copyright notice,
+    this list of conditions and the following disclaimer.
+2.  Redistributions in binary form must reproduce the original copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+3.  Neither my name (David L Parsons) nor the names of contributors to
+    this code may be used to endorse or promote products derived
+    from this work without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+

thirdparty/discount-2.2.6-patched/CREDITS

+Discount is primarily my work, but it has only reached the point
+where it is via contributions, critiques, and bug reports from a
+host of other people, some of which are listed before.   If your
+name isn't on this list, please remind me
+				    -david parsons (orc@pell.portland.or.us)
+
+
+Josh Wood	--  Plan9 support.
+Mike Schiraldi	--  Reddit style automatic links, MANY MANY MANY
+		    bug reports about boundary conditions and
+		    places where I didn't get it right.
+Jjgod Jiang	--  Table of contents support.
+Petite Abeille	--  Many bug reports about places where I didn't
+		    get it right.
+Tim Channon	--  inspiration for the `mkd_xhtmlpage()` function
+Christian Herenz--  Many bug reports regarding my implementation of
+		    `[]()` and `![]()`
+A.S.Bradbury	--  Portability bug reports for 64 bit systems.
+Joyent		--  Loan of a solaris box so I could get discount
+		    working under solaris.
+Ryan Tomayko	--  Portability requests (and the rdiscount ruby
+		    binding.)
+yidabu		--  feedback on the documentation, bug reports
+		    against utf-8 support.
+Pierre Joye	--  bug reports, php discount binding.
+Masayoshi Sekimura- perl discount binding.
+Jeremy Hinegardner- bug reports about list handling.
+Andrew White	--  bug reports about the format of generated urls.
+Steve Huff	--  bug reports about Makefile portability (for Fink)
+Ignacio Burgue?o--  bug reports about `>%class%`
+Henrik Nyh	--  bug reports about embedded html handling.
+John J. Foerch  --  bug reports about incorrect `–` and `—`
+                    translations.
+
+		    

thirdparty/discount-2.2.6-patched/Csio.c

+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include "cstring.h"
+#include "markdown.h"
+#include "amalloc.h"
+
+
+/* putc() into a cstring
+ */
+void
+Csputc(int c, Cstring *iot)
+{
+    EXPAND(*iot) = c;
+}
+
+
+/* printf() into a cstring
+ */
+int
+Csprintf(Cstring *iot, char *fmt, ...)
+{
+    va_list ptr;
+    int siz=100;
+
+    do {
+	RESERVE(*iot, siz);
+	va_start(ptr, fmt);
+	siz = vsnprintf(T(*iot)+S(*iot), ALLOCATED(*iot)-S(*iot), fmt, ptr);
+	va_end(ptr);
+    } while ( siz > (ALLOCATED(*iot)-S(*iot)) );
+
+    S(*iot) += siz;
+    return siz;
+}
+
+
+/* write() into a cstring
+ */
+int
+Cswrite(Cstring *iot, char *bfr, int size)
+{
+    RESERVE(*iot, size);
+    memcpy(T(*iot)+S(*iot), bfr, size);
+    S(*iot) += size;
+    return size;
+}
+
+
+/* reparse() into a cstring
+ */
+void
+Csreparse(Cstring *iot, char *buf, int size, mkd_flag_t flags)
+{
+    MMIOT f;
+    ___mkd_initmmiot(&f, 0);
+    ___mkd_reparse(buf, size, flags, &f, 0);
+    ___mkd_emblock(&f);
+    SUFFIX(*iot, T(f.out), S(f.out));
+    ___mkd_freemmiot(&f, 0);
+}

thirdparty/discount-2.2.6-patched/INSTALL

+
+		    HOW TO BUILD AND INSTALL DISCOUNT
+
+1) Unpacking the distribution
+
+The DISCOUNT sources are distributed in tarballs.  After extracting from
+the tarball, you should end up with all the source and build files in the
+directory
+		discount-(version)
+
+2) Installing the distribution
+
+DISCOUNT uses configure.sh to set itself up for compilation.   To run
+configure, just do ``./configure.sh'' and it will check your system for
+build dependencies and build makefiles for you.   If configure.sh finishes
+without complaint, you can then do a ``make'' to compile everything and a
+``make install'' to install the binaries.
+
+Configure.sh has a few options that can be set:
+
+--src=DIR		where the source lives (.)
+--prefix=DIR		where to install the final product (/usr/local)
+--execdir=DIR		where to put executables (prefix/bin)
+--sbindir=DIR		where to put static executables (prefix/sbin)
+--confdir=DIR		where to put configuration information (/etc)
+--libdir=DIR		where to put libraries (prefix/lib)
+--libexecdir=DIR	where to put private executables
+--mandir=DIR		where to put manpages
+--with-amalloc		Use my paranoid malloc library to catch memory leaks
+--shared		Build shared libraries
+--debian-glitch		When mangling email addresses, do them deterministically
+			so the Debian regression tester won't complain
+--pkg-config		Build & install a pkg-config(1) .pc file for
+			the discount library.
+--h1-title		Have theme & mkd2html use the first h1 in a document
+			as the title if there's no pandoc header or title
+			specified on the command line.
+--cxx-binding		Wrap mkdio.h with (conditional) 'extern "C"' for c++
+			binding.
+
+3) Testing
+
+``make test'' runs discount against a collection of test cases.
+
+
+4) Installing sample programs and manpages
+
+The standard ``make install'' rule just installs the binaries. If you
+want to install the sample programs, they are installed with
+``make install.samples'';  to install manpages, ``make install.man''.
+A shortcut to install everything is ``make install.everything''
+
+
+5) Assorted platform gotchas
+
+   1.  On NetBSD (version 8 for certain) running configure.sh by
+       itself will result in logging output being mixed in with diagnostic
+       output on the screen instead of having it written to config.log.
+       If, instead, you do `ksh ./configure.sh`, it will be much less
+       garbled (the shell defaults all fds > stderr to close on exec,
+       so my redirecting stdout fails after the first subprocess.)
+   2.  On 9Front (and maybe every other extant plan9 variant) the
+       system mkfile sets the `T' flag in CFLAGS; there are several
+       places where I typedef voids to opaque structure pointers and
+       this makes the build die when it attempts to link anything.

thirdparty/discount-2.2.6-patched/Makefile.in

+CC=@CC@
+CFLAGS=@CFLAGS@
+LDFLAGS=@LDFLAGS@
+AR=@AR@
+RANLIB=@RANLIB@
+INSTALL_PROGRAM=@INSTALL_PROGRAM@
+INSTALL_DIR=@INSTALL_DIR@
+INSTALL_DATA=@INSTALL_DATA@
+
+BUILD=$(CC) -fPIC -I. $(CFLAGS)
+LINK=$(CC) -fPIC -L. $(LDFLAGS)
+
+.c.o:
+	$(BUILD) -c -o $@ $<
+
+
+BINDIR=@exedir@
+MANDIR=@mandir@
+LIBDIR=@libdir@
+INCDIR=@prefix@/include
+@MK_PKGCONFIG@PKGDIR=$(LIBDIR)/pkgconfig
+
+PGMS=markdown
+SAMPLE_PGMS=mkd2html makepage
+@THEME@SAMPLE_PGMS+= theme
+MKDLIB=libmarkdown
+OBJS=mkdio.o markdown.o dumptree.o generate.o \
+     resource.o docheader.o version.o toc.o css.o \
+     xml.o Csio.o xmlpage.o basename.o emmatch.o \
+     github_flavoured.o setup.o tags.o html5.o \
+     @AMALLOC@ @H1TITLE@ flags.o
+TESTFRAMEWORK=echo cols branch pandoc_headers
+
+# modules that markdown, makepage, mkd2html, &tc use
+COMMON=pgm_options.o gethopt.o notspecial.o
+
+MAN3PAGES=mkd-callbacks.3 mkd-functions.3 markdown.3 mkd-line.3
+
+all: $(PGMS) $(SAMPLE_PGMS) $(TESTFRAMEWORK)
+
+install: $(PGMS) $(DESTDIR)$(BINDIR) $(DESTDIR)$(LIBDIR) $(DESTDIR)$(INCDIR) $(DESTDIR)$(PKGDIR)
+	$(INSTALL_PROGRAM) $(PGMS) $(DESTDIR)$(BINDIR)
+	./librarian.sh install libmarkdown VERSION $(DESTDIR)$(LIBDIR)
+	$(INSTALL_DATA) mkdio.h $(DESTDIR)$(INCDIR)
+	@MK_PKGCONFIG@$(INSTALL_DATA) $(MKDLIB).pc $(DESTDIR)$(PKGDIR)
+
+install.everything: install install.samples install.man
+
+install.samples: $(SAMPLE_PGMS) install $(DESTDIR)$(BINDIR)
+	$(INSTALL_DIR) $(DESTDIR)$(MANDIR)/man1
+	for x in $(SAMPLE_PGMS); do \
+	    $(INSTALL_PROGRAM) $$x $(DESTDIR)$(BINDIR)/$(SAMPLE_PFX)$$x; \
+	    $(INSTALL_DATA) $$x.1 $(DESTDIR)$(MANDIR)/man1/$(SAMPLE_PFX)$$x.1; \
+	done
+
+install.man:
+	$(INSTALL_DIR) $(DESTDIR)$(MANDIR)/man3
+	$(INSTALL_DATA) $(MAN3PAGES) $(DESTDIR)$(MANDIR)/man3
+	for x in mkd_line mkd_generateline; do \
+	    ( echo '.\"' ; echo ".so man3/mkd-line.3" ) > $(DESTDIR)$(MANDIR)/man3/$$x.3;\
+	done
+	for x in mkd_in mkd_string; do \
+	    ( echo '.\"' ; echo ".so man3/markdown.3" ) > $(DESTDIR)$(MANDIR)/man3/$$x.3;\
+	done
+	for x in mkd_compile mkd_css mkd_generatecss mkd_generatehtml mkd_cleanup mkd_doc_title mkd_doc_author mkd_doc_date; do \
+	    ( echo '.\"' ; echo ".so man3/mkd-functions.3" ) > $(DESTDIR)$(MANDIR)/man3/$$x.3; \
+	done
+	$(INSTALL_DIR) $(DESTDIR)$(MANDIR)/man7
+	$(INSTALL_DATA) markdown.7 mkd-extensions.7 $(DESTDIR)$(MANDIR)/man7
+	$(INSTALL_DIR) $(DESTDIR)$(MANDIR)/man1
+	$(INSTALL_DATA) markdown.1 $(DESTDIR)$(MANDIR)/man1
+
+install.everything: install install.man
+
+$(DESTDIR)$(BINDIR):
+	$(INSTALL_DIR) $(DESTDIR)$(BINDIR)
+
+$(DESTDIR)$(INCDIR):
+	$(INSTALL_DIR) $(DESTDIR)$(INCDIR)
+
+$(DESTDIR)$(LIBDIR):
+	$(INSTALL_DIR) $(DESTDIR)$(LIBDIR)
+
+@MK_PKGCONFIG@$(DESTDIR)$(PKGDIR):
+@MK_PKGCONFIG@	$(INSTALL_DIR) $(DESTDIR)$(PKGDIR)
+
+version.o: version.c VERSION branch
+	$(BUILD) -DBRANCH=`./branch` -DVERSION=\"`cat VERSION`\" -c version.c
+
+VERSION:
+	@true
+
+tags.o: tags.c cstring.h tags.h blocktags
+
+blocktags: mktags
+	./mktags > blocktags
+
+mktags: mktags.o
+	$(LINK) -o mktags mktags.o
+
+# example programs
+@THEME@theme:  theme.o $(COMMON) $(MKDLIB) mkdio.h
+@THEME@	$(LINK) -o theme theme.o $(COMMON) -lmarkdown @LIBS@
+
+
+mkd2html:  mkd2html.o $(MKDLIB) mkdio.h gethopt.h $(COMMON)
+	$(LINK) -o mkd2html mkd2html.o $(COMMON) -lmarkdown @LIBS@
+
+markdown: main.o $(COMMON) $(MKDLIB)
+	$(LINK) -o markdown main.o $(COMMON) -lmarkdown @LIBS@
+
+makepage.o: makepage.c mkdio.h
+	$(BUILD) -c makepage.c
+makepage:  makepage.o $(COMMON) $(MKDLIB)
+	$(LINK) -o makepage makepage.o $(COMMON) -lmarkdown @LIBS@
+
+pgm_options.o: pgm_options.c mkdio.h config.h
+	$(BUILD) -c pgm_options.c
+
+notspecial.o: notspecial.c
+	$(BUILD) -c notspecial.c
+
+gethopt.o: gethopt.c
+	$(BUILD) -c gethopt.c
+
+main.o: main.c mkdio.h config.h
+	$(BUILD) -c main.c
+
+$(MKDLIB): $(OBJS)
+	./librarian.sh make $(MKDLIB) VERSION $(OBJS)
+
+verify: echo tools/checkbits.sh
+	@./echo -n "headers ... "; tools/checkbits.sh && echo "GOOD"
+
+test:	$(PGMS) $(TESTFRAMEWORK) verify
+	@for x in $${TESTS:-tests/*.t}; do \
+	    @LD_LIBRARY_PATH@=`pwd` sh $$x || exit 1; \
+	done
+
+pandoc_headers.o: tools/pandoc_headers.c config.h
+	$(BUILD) -c -o pandoc_headers.o tools/pandoc_headers.c
+pandoc_headers: pandoc_headers.o
+	$(LINK) -o pandoc_headers pandoc_headers.o $(COMMON) -lmarkdown
+
+branch.o: tools/branch.c config.h
+	$(BUILD) -c -o branch.o tools/branch.c
+branch: branch.o
+	$(LINK) -o branch branch.o
+
+cols.o:	tools/cols.c config.h
+	$(BUILD) -c -o cols.o tools/cols.c
+cols:   cols.o
+	$(LINK) -o cols cols.o
+
+echo.o:	tools/echo.c config.h
+	$(BUILD) -c -o echo.o tools/echo.c
+echo:   echo.o
+	$(LINK) -o echo echo.o
+
+clean:
+	rm -f $(PGMS) $(TESTFRAMEWORK) $(SAMPLE_PGMS) *.o
+	rm -f $(MKDLIB) `./librarian.sh files $(MKDLIB) VERSION`
+
+distclean spotless: clean
+	@DISTCLEAN@ @GENERATED_FILES@ @CONFIGURE_FILES@ ./mktags ./blocktags
+
+Csio.o: Csio.c cstring.h amalloc.h config.h markdown.h
+amalloc.o: amalloc.c
+basename.o: basename.c config.h cstring.h amalloc.h markdown.h
+css.o: css.c config.h cstring.h amalloc.h markdown.h
+docheader.o: docheader.c config.h cstring.h amalloc.h markdown.h
+dumptree.o: dumptree.c markdown.h cstring.h amalloc.h config.h
+emmatch.o: emmatch.c config.h cstring.h amalloc.h markdown.h
+generate.o: generate.c config.h cstring.h amalloc.h markdown.h
+main.o: main.c config.h amalloc.h
+pgm_options.o: pgm_options.c pgm_options.h config.h amalloc.h
+makepage.o: makepage.c
+markdown.o: markdown.c config.h cstring.h amalloc.h markdown.h
+mkd2html.o: mkd2html.c config.h mkdio.h cstring.h amalloc.h
+mkdio.o: mkdio.c config.h cstring.h amalloc.h markdown.h
+resource.o: resource.c config.h cstring.h amalloc.h markdown.h
+theme.o: theme.c config.h mkdio.h cstring.h amalloc.h
+toc.o: toc.c config.h cstring.h amalloc.h markdown.h
+version.o: version.c config.h
+xml.o: xml.c config.h cstring.h amalloc.h markdown.h
+xmlpage.o: xmlpage.c config.h cstring.h amalloc.h markdown.h
+setup.o: setup.c config.h cstring.h amalloc.h markdown.h
+github_flavoured.o: github_flavoured.c config.h cstring.h amalloc.h markdown.h
+gethopt.o: gethopt.c gethopt.h
+h1title.o: h1title.c markdown.h
+notspecial.o: notspecial.c config.h

thirdparty/discount-2.2.6-patched/Plan9/README.md

+# *Discount* Markdown compiler on Plan 9
+
+## Build
+    % CONFIG='--with-tabstops=7' mk config
+    % mk test
+    % mk install
+    % markdown -V
+    markdown: discount X.Y.Z TAB=7
+
+### Configuration
+To select features and extensions, `--with-tabstops=7` may be replaced by zero or more of:
+
+* `--enable-pandoc-header`:  Use pandoc-style header blocks
+* `--enable-superscript`:  `A^B` becomes A<sup>B</sup>
+* `--enable-amalloc`:  Enable memory allocation debugging
+* `--with-tabstops=`*N*:  Set tabstops to *N* characters (default 4)
+* `--enable-alpha-list`:  Enable `(a)/(b)/(c)` list markers
+* `--enable-all-features`:  Turn on all stable optional features
+
+## Notes
+1. This is not a port from POSIX to native Plan 9 APIs. The supplied
+`mkfile` merely drives Discount's own `configure.sh` through Plan 9's
+*APE* environment (in *pcc*(1)) to build the Discount source, then
+copies the result to locations appropriate for system-wide use on
+Plan 9.
+
+2. There are a few other *mk*(1) targets:
+    * `install.libs`:  Discount includes a C library and header.
+Installation is optional.  Plan 9 binaries are statically linked.
+    * `install.man`:  Add manual pages for *markdown* in sections 1, 2, and 6.
+    * `install.progs`:  Extra programs.  *makepage* writes complete XHTML
+documents, rather than fragments.  *mkd2html* is similar, but produces
+HTML.

thirdparty/discount-2.2.6-patched/Plan9/markdown.1

+.TH MARKDOWN 1 
+.SH NAME
+markdown \- convert Markdown text to HTML
+.SH SYNOPSIS
+.B markdown
+[
+.B -dTV
+]
+[
+.BI -b " url-base
+]
+[
+.BI -F " bitmap
+]
+[
+.BI -f " flags
+]
+[
+.BI -o " ofile
+]
+[
+.BI -s " text
+]
+[
+.BI -t " text
+]
+[
+.I file
+]
+.SH DESCRIPTION
+The
+.I markdown
+utility reads the
+.IR Markdown (6)-formatted
+.I file
+(or standard input) and writes its
+.SM HTML
+fragment representation on standard output.
+.PP
+The options are:
+.TF dfdoptions
+.TP
+.BI -b " url-base
+Links in source begining with
+.B /
+will be prefixed with
+.I url-base
+in the output.
+.TP
+.B -d
+Instead of printing an
+.SM HTML
+fragment, print a parse tree.
+.TP
+.BI -F " bitmap
+Set translation flags.
+.I Bitmap
+is a bit map of the various configuration options described in
+.IR markdown (2).
+.TP
+.BI -f " flags
+Set or clear various translation
+.IR flags ,
+described below.
+.I Flags
+are in a comma-delimited list, with an optional
+.B +
+(set) prefix on each flag.
+.TP
+.BI -o " ofile
+Write the generated
+.SM HTML
+to
+.IR ofile .
+.TP
+.BI -s " text
+Use the
+.IR markdown (2)
+function to format the
+.I text
+on standard input.
+.TP
+.B -T
+Under
+.B -f
+.BR toc ,
+print the table of contents as an unordered list before the usual
+.SM HTML
+output.
+.TP
+.BI -t " text
+Use
+.IR mkd_text
+(in
+.IR markdown (2))
+to format
+.I text
+instead of processing standard input with
+.IR markdown .
+.TP
+.B -V
+Show version number and configuration. If the version includes the string
+.BR DL_TAG ,
+.I markdown
+was configured with definition list support. If the version includes the string
+.BR HEADER ,
+.I markdown
+was configured to support pandoc header blocks.
+.PD
+.SS TRANSLATION FLAGS
+The translation flags understood by
+.B -f
+are:
+.TF \ noheader
+.TP
+.B noimage
+Don't allow image tags.
+.TP
+.B nolinks
+Don't allow links.
+.TP
+.B nohtml
+Don't allow any embedded HTML.
+.TP
+.B cdata
+Generate valid XML output.
+.TP
+.B noheader
+Do not process pandoc headers.
+.TP
+.B notables
+Do not process the syntax extension for tables.
+.TP
+.B tabstops
+Use Markdown-standard 4-space tabstops.
+.TP
+.B strict
+Disable superscript and relaxed emphasis.
+.TP