#!/bin/sh

# - place this file in the 'hooks' directory of a bare git repository
# - this assumes that repo2html is in your path

# The toplevel path containing directories of static pages
[ "$REPO2HTML_PREFIX" ] || export REPO2HTML_PREFIX=/var/www/git
# The toplevel clone url for repos.
export REPO2HTML_CLONE_URL=git://git.example.com
export REPO2HTML_TITLE=git.example.com
export REPO2HTML_DESCRIPTION="sherry's git repositories"
export REPO2HTML_H1=git.example.com

# hueristic attempt to detect a reasonable default for the name of this repo
# you may want to adjust this if you have e.g. sub-directories containing repos
# whose structure you want to preserve on the webserver.
if repo_name="$(git config repo2html.dirname)"; then
    : # repo name from git config; do nothing else
elif [ "$(git rev-parse --is-bare-repository)" = "true" ]; then
    # bare /foo/bar/baz/myrepo.git -> myrepo
    repo_name="$(basename "$(pwd)" .git)"
    git config repo2html.dirname "$repo_name"
else
    # /foo/bar/baz/myrepo/.git -> myrepo
    repo_name="$(basename "$(dirname "$(pwd)")")"
    git config repo2html.dirname "$repo_name"
fi

# only generate if default branch is modified
headref="$(git symbolic-ref -q HEAD)"
while read -r _ _ ref
do [ "$ref" = "$headref" ] && go=1
done
if [ "$go" ]; then
    echo "$headref was updated; regenerating HTML at: $REPO2HTML_PREFIX/$repo_name"
else
    echo "($headref was not updated so HTML will not be regenerated.)"
    exit 0
fi

# check to see if we can even write to the specified directory
if mkdir -p "$REPO2HTML_PREFIX/$repo_name" && \
    [ -x "$REPO2HTML_PREFIX/$repo_name" ] && \
    [ -w "$REPO2HTML_PREFIX/$repo_name" ]
then
    : # we can write to the directory; seems good
else
    echo "Error: can't generate HTML due to insufficient permissions on path:"
    echo "    $REPO2HTML_PREFIX/$repo_name"
    echo "Set REPO2HTML_PREFIX in the environment or this script:"
    echo "    $0"
    exit 1
fi

repo2html "$REPO2HTML_PREFIX/$repo_name"