cgit/filters/syntax-highlighting.sh



#!/bin/sh
# This script can be used to implement syntax highlighting in the cgit
# tree-view by referring to this file with the source-filter or repo.source-
# filter options in cgitrc.

# Depends: cmark highlight

# The following environment variables can be used to retrieve the configuration
# of the repository for which this script is called:
# CGIT_REPO_URL        ( = repo.url       setting )
# CGIT_REPO_NAME       ( = repo.name      setting )
# CGIT_REPO_PATH       ( = repo.path      setting )
# CGIT_REPO_OWNER      ( = repo.owner     setting )
# CGIT_REPO_DEFBRANCH  ( = repo.defbranch setting )
# CGIT_REPO_SECTION    ( = section        setting )
# CGIT_REPO_CLONE_URL  ( = repo.clone-url setting )

# store filename and extension in local vars
BASENAME="$1"
EXTENSION="${BASENAME##*.}"

[ "${BASENAME}" = "${EXTENSION}" ] && EXTENSION=txt
[ -z "${EXTENSION}" ] && EXTENSION=txt

# map Makefile and Makefile.* to .mk
[ "${BASENAME%%.*}" = "Makefile" ] && EXTENSION=mk

# map less common markdown extensions to .md
case "$(printf '%s' "$EXTENSION" | tr '[:upper:]' '[:lower:]')" in
    markdown|mdown|mkd|mdwn) EXTENSION=md;;
esac

case "$EXTENSION" in
    md) exec cmark;;
    *) exec highlight --force -f -I -O xhtml -S "$EXTENSION" --ordered-list --line-number-ref=n 2>/dev/null;;
esac