#!/bin/sh

# applypatch-msg for Zsh which extracts X-Seq from the patch and prepends it
# to the commit message.


if test ! -f "$1"; then
    exit 0
fi

# Path to ".git/rebase-apply/" directory.
dotest=`dirname "$1"`
# Path to the patch file which will be applied.
this=`cat "$dotest/next"`
patch="$dotest/`printf '%04d' "$this"`"

# Extract sequence number.
sequence=`grep -E '^X-Seq: ' "$patch" | awk '{ print $2 }'`
if test -z "$sequence"; then
    exit 0
fi

# Prepend sequence number to commit message if not already present.
if ! grep -E '^unposted: ' "$1" > /dev/null &&
   ! grep -E '^[0-9][0-9]*: ' "$1" > /dev/null; then
    printf "%s: " "$sequence" > "$1.tmp"
    cat "$1" >> "$1.tmp"
    mv "$1.tmp" "$1"
fi