Render both about page and tree's text blobs in cgit.

blob-formatting.sh

#!/usr/bin/env bash

# @file      blob-formatting.sh
# @brief     Format text blobs for CGit.
# @author    Alexandre Martos
# @email     contact@amartos.fr
# @year      2023
# @copyright GPLv3
#
# This script is designed to be used for both `about-filter` and
# `source-filter` in the CGit config file (see `cgitrc(5)`).
#
# The `about` tab behavior is the same as the `about-formatting.sh` filter
# script (part of this script is copied from it, other parts from the
# `syntax-highlighting.sh` script).
# For text blobs in the `tree` tab, the rendering is done as for the `about`
# tab, instead of displaying synctactically highlighted raw text.
#
# One caveat is that, in order to easily display text blobs without huge
# modifications of neither the CSS nor the source code, the blob table
# usually used to display the code is prematurely terminated.
# For both tabs, this means that *there will be* some dangling closing tags,
# either before or after the rendered HTML. As browsers should properly
# handle those (ie. not show them), this should not be a huge issue.
#
# The dependencies are the same as the `about-formatting.sh` and
# `syntax-highlighting.sh` scripts, plus those of org2html if you use it.

BASENAME="$1"
EXTENSION="${BASENAME##*.}"
NOTCODE="</code></pre></td></tr></tbody></table><style>table.blob{display:none}</style>"

[ -z "$EXTENSION" -o "$BASENAME" = "$EXTENSION" ] && EXTENSION=txt
[ "${BASENAME%%.*}" = "Makefile" ] && EXTENSION=mk

case "$EXTENSION" in
    org|markdown|mdown|md|mkd|rst|htm|html|txt|[1-9]) echo "$NOTCODE"; ;;
    *);;
esac

cd "$(dirname $0)/html-converters/"
case "$EXTENSION" in
    # see https://github.com/amartos/cgit-org2html for Org conversion support.
    #org) exec ./org2html "$1"; ;; # $1 for not overwriting cached files
    markdown|mdown|md|mkd) exec ./md2html; ;;
    rst) exec ./rst2html; ;;
    [1-9]) exec ./man2html; ;;
    html|html) exec cat; ;;
    txt) exec ./txt2html; ;;
    #*) exec highlight --force -f -I -X -S "$EXTENSION" 2>/dev/null; ;; #v2
    *) exec highlight --force -f -I -O xhtml -S "$EXTENSION" 2>/dev/null; ;; #v3
esac