pre-push

#!/bin/bash

# Originally writtten by Stefans Mezulis <stefans.mezulis@gmail.com> for
# https://github.com/pipeseroni/packaging-aur
# Released into the public domain via the CC0 waiver.

# Ensure that the name of the remote matches the name of the branch.
# That is, we are pushing the correct branch to the correct repository.
#
# Also check that the remote URL matches the remote name. That is, if
# the remote name is "pipes.c", the URL should end in "/pipes.c.git".
#
# Finally, check that the hashes in the .SRCINFO match those in the PKGBUILD.
#
# This hook is called with the following parameters:
#
# $1 -- Name of the remote to which the push is being done
# $2 -- URL to which the push is being done
#

remote="$1"
url="$2"
branch=$(git rev-parse --abbrev-ref HEAD)
aur_url="ssh://aur@aur.archlinux.org/"

if [[ "$url" == $aur_url* && "$remote" != "$branch" ]]; then
    echo "Remote repository name '$remote' " \
         "does not match branch name '$branch'" \
         >&2
    exit 1
fi

if [[ "$url" == $aur_url* && "$url" != *"/$remote.git" ]]; then
    echo "Remote name '$remote' does not match the remote URL '$url'." \
         "The autoupdate script expects remote names and URLs to correspond." \
         >&2
    exit 2
fi

if [[ "$branch" == "pipes."* ]]; then

    # Here, we compare the .SRCINFO generated from indexed PKGBUILD with the
    # indexed .SRCINFO. Do this by extracting the indexed PKGBUILD to a
    # temporary directory and comparing it to the indexed .SRCINFO.
    tmpdir=$(mktemp -d pipes-tmp.XXXXXXXXXX)
    git show HEAD:PKGBUILD > "$tmpdir/PKGBUILD"
    diff_output=$(\
        diff -u --label indexed/.SRCINFO --label generated/.SRCINFO \
            <(git show HEAD:.SRCINFO) \
            <(cd "$tmpdir" && makepkg --printsrcinfo))
    diff_exit=$?
    rm -rf "$tmpdir"

    if [[ $diff_exit != 0 ]]; then
        echo "Contents of .SRCINFO in git index do not match contents of" \
             ".SRCINFO generated from indexed PKGBUILD. Diff:" \
             >&2
        echo "$diff_output" >&2
        exit 1
    fi
fi