gp_common

#!/bin/bash
# gitpkg common shell functions and variables

# DISTRO should go to some config file
DISTRO=mer

pkg_branch=pkg-$DISTRO

ME=$(basename $0)


# Input: $pkgdir
# Output: $ver  $rel
get_info_from_packaging() {
    _pkgdir=${1:-.}
    # See if there's a yaml or a .spec
    _vrfile=$(cd $_pkgdir; find . -maxdepth 1 -name '*yaml' -print -quit)
    _vrfile=${vrfile:-$(cd $_pkgdir; find . -maxdepth 1 -name '*spec' -print -quit)}
    if [[ -f $_pkgdir/$_vrfile ]]; then
	ver=$(grep Version: $_pkgdir/$_vrfile | cut -f2 -d: | tr -d ' ')
	rel=$(grep Release: $_pkgdir/$_vrfile | cut -f2 -d: | tr -d ' ')
	name=$(grep Name: $_pkgdir/$_vrfile | cut -f2 -d: | tr -d ' ')
	echo "Found Version/Release: $ver-$rel in the packaging"
    fi
}

# Input: 
# Output: 
# http://stackoverflow.com/a/3879077/337649
require_clean_work_tree() {
    # Update the index
    git update-index -q --ignore-submodules --refresh
    local _err=0

    # Disallow unstaged changes in the working tree
    if ! git diff-files --quiet --ignore-submodules --
    then
        echo >&2 "cannot $1: you have unstaged changes."
        git diff-files --name-status -r --ignore-submodules -- >&2
        _err=1
    fi

    # Disallow uncommitted changes in the index
    if ! git diff-index --cached --quiet HEAD --ignore-submodules --
    then
        echo >&2 "cannot $1: your index contains uncommitted changes."
        git diff-index --cached --name-status -r --ignore-submodules HEAD -- >&2
        _err=1
    fi

    if [ $_err = 1 ]
    then
        echo >&2 "Please commit or stash them before using $ME."
        exit 1
    fi
}

count_commits() {
    git rev-list $1..$2 | wc -l
}

# Sets global initial_branch
save_initial_branch() {
    initial_branch=$(git symbolic-ref HEAD)
    initial_branch=${initial_branch##refs/heads/}
}

git_tag_cleanly() {
    git tag $@
    tag_cleanup_list+=" $1"
}

cleanup(){
    echo "Attempting to switch back to $initial_branch in git"
    git checkout -f $initial_branch
    if [[ $tag_cleanup_list ]] ; then
	echo "cleaning up tags: $tag_cleanup_list"
	for tag in $tag_cleanup_list; do
	    git tag -d $tag
	done
    fi
    if [[ $branch_cleanup_list ]]; then
	echo "cleaning up branches: $branch_cleanup_list"
	for branch in $branch_cleanup_list; do
	    git branch -D $branch
	done
    fi
}

# If the first arg is 'usage' then usage() is called right before exit
fatal() {
    if [[ $1 == "usage" ]]; then
	shift
	usage=1
    fi
    if [[ $1 ]]; then
	echo "$@"
    else # support fatal << EOF
	cat
    fi
    [[ $usage ]] && usage
    exit 1
}

export GIT_AUTHOR_EMAIL=${GIT_AUTHOR_EMAIL:-$(git config user.email)}
export GIT_AUTHOR_NAME=${GIT_AUTHOR_NAME:-$(git config user.name)}