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cgitsb/filters/syntax-highlighting.sh
Georg Lukas 56522ebe13 syntax highlighting for all formats supported by "highlight"
The highlight tool can be given any of the supported file extensions
as its -S parameter. This patch replaces the case-switch by extracting
the extension from the supplied file name and passing it to highlight.
However, this requires a shell supporting the ${var##pattern} syntax,
like dash or bash.

Unknown extensions cause a fall-back to plain text using the --force
switch. Error messages are redirected to /dev/null.

A special case maps Makefile and Makefile.* to the "mk" extension.

The total overhead is reduced by calling "exec highlight". No forks are
needed during script execution.

Signed-off-by: Georg Lukas <georg@op-co.de>
2009-11-19 12:14:45 +01:00

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#!/bin/sh
# This script can be used to implement syntax highlighting in the cgit
# tree-view by refering to this file with the source-filter or repo.source-
# filter options in cgitrc.
#
# This script requires a shell supporting the ${var##pattern} syntax.
# It is supported by at least dash and bash, however busybox environments
# might have to use an external call to sed instead.
#
# Note: the highlight command (http://www.andre-simon.de/) uses css for syntax
# highlighting, so you'll probably want something like the following included
# in your css file (generated by highlight 2.4.8 and adapted for cgit):
#
# table.blob .num { color:#2928ff; }
# table.blob .esc { color:#ff00ff; }
# table.blob .str { color:#ff0000; }
# table.blob .dstr { color:#818100; }
# table.blob .slc { color:#838183; font-style:italic; }
# table.blob .com { color:#838183; font-style:italic; }
# table.blob .dir { color:#008200; }
# table.blob .sym { color:#000000; }
# table.blob .kwa { color:#000000; font-weight:bold; }
# table.blob .kwb { color:#830000; }
# table.blob .kwc { color:#000000; font-weight:bold; }
# table.blob .kwd { color:#010181; }
# store filename and extension in local vars
BASENAME="$1"
EXTENSION="${BASENAME##*.}"
# map Makefile and Makefile.* to .mk
[ "${BASENAME%%.*}" == "Makefile" ] && EXTENSION=mk
exec highlight --force -f -I -X -S $EXTENSION 2>/dev/null