git-cat

#!/bin/bash

# For debugging
#set -x

prog="${0##*/}"

if [ $# -lt 2 ]; then
	branch=HEAD
	# echo "Usage: $prog branch file [file..]"
	# exit 1
else
	branch="$1"
fi

root="$(git rev-parse --show-toplevel)"
# check to see if we should stick "origin/" in front
if [[ ! -r "${root}/.git/refs/heads/${branch}" ]]; then
	# grep for the branch name fromthe list of branches, pinning it to the end
	branches=($(git branch -r | grep -i "${branch}$"))
	if [[ ${#branches[@]} == 1 ]]; then
		branch="${branches}"
		echo "${prog}: using branch $branch"
	elif [[ ${#branches[@]} == 0 ]]; then
		if [[ $(git cat-file -t ${branch} 2>/dev/null) != "commit" ]]; then
			echo "${prog}: Cannot find branch or commit locally or on any server: $branch"
			exit 1
		fi
	else
		echo "${prog}: branch name is ambiguous: ${branch}"
		for br in "${branches[@]}"; do
			echo "    $br"
		done
		exit 1
	fi
fi

shift

for file; do
	if [[ "${file}" != /* && "${file}" != ./* ]]; then
		file="./${file}"
	fi
	echo git show "${branch}":"${file}"
	git show "${branch}":"${file}"
done