Git aliases and hooks for CPython workflow

gitconfig

# Aliases for working with a hg-git enabled mercurial repository in .git/hg
[alias]
	hg-dir = "!echo ${GIT_DIR:-.git}/hg"
	hg-run = "!hg -R $(git hg-dir)"
	hg-git-dir = "!echo $(git hg-dir)/.hg/git"
	hg-git-branch = "!f() { [ \"$1\" = default ] && echo master || echo \"$1\"; }; f"
	hg-update-bookmarks = "!git hg-run branches | while read branch rev rest; do target=$(git hg-git-branch $branch); rev=$(echo $rev | sed -r \"s/([0-9]+):.*/\\1/\"); git hg-run bookmark -f -r $rev $target; done"
	hg-delete-bookmarks = "!git hg-run bookmarks | sed -r 's/[[:space:]]+(.+?)[[:space:]]+.*/\\1/' | xargs -n 1 git hg-run bookmark -d"
	hg-hg2git = "!git hg-update-bookmarks && git hg-run gexport"
	hg-git2hg = "!git hg-delete-bookmarks && git hg-run gimport"
	hg-fetch = "!git hg-run pull && git hg-hg2git"
	hg-outgoing = "!git hg-git2hg && git hg-run outgoing"
	hg-push = "!git hg-git2hg && git hg-run push"

prepare-commit-msg

#!/bin/sh

# Check whether we already have hg-git metadata
grep -r -e "^--HG--$" $1 && grep -r -e "^branch : " $1 && exit 0

branch=$(git symbolic-ref HEAD 2>/dev/null | sed s:refs/heads/::)

if [ -n "$branch" -a "$branch" != "master" ]; then
    printf '\n\n--HG--\nbranch : %s\n' "$branch" > $1.tmp
    cat $1 >> $1.tmp
    mv $1.tmp $1
fi