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syntax highlighting for all formats supported by "highlight"

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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>
This commit is contained in:
Georg Lukas 2009-11-19 12:14:45 +01:00
parent e633ccf714
commit 56522ebe13
1 changed files with 12 additions and 17 deletions
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29
filters/syntax-highlighting.sh
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@ -3,6 +3,10 @@
# tree-view by refering to this file with the source-filter or repo.source- # tree-view by refering to this file with the source-filter or repo.source-
# filter options in cgitrc. # 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 # Note: the highlight command (http://www.andre-simon.de/) uses css for syntax
# highlighting, so you'll probably want something like the following included # 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): # in your css file (generated by highlight 2.4.8 and adapted for cgit):
@ -20,20 +24,11 @@
# table.blob .kwc { color:#000000; font-weight:bold; } # table.blob .kwc { color:#000000; font-weight:bold; }
# table.blob .kwd { color:#010181; } # table.blob .kwd { color:#010181; }
case "$1" in # store filename and extension in local vars
*.c) BASENAME="$1"
highlight -f -I -X -S c EXTENSION="${BASENAME##*.}"
;;
*.h) # map Makefile and Makefile.* to .mk
highlight -f -I -X -S c [ "${BASENAME%%.*}" == "Makefile" ] && EXTENSION=mk
;;
*.sh) exec highlight --force -f -I -X -S $EXTENSION 2>/dev/null
highlight -f -I -X -S sh
;;
*.css)
highlight -f -I -X -S css
;;
*)
highlight -f -I -X -S txt
;;
esac