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git-history.bash

#!/bin/bash

file="$1"

# Date flag
if [[ "$file" == "-v" ]]
then
	file="$2"
	verbose=1
fi

export file
export verbose

if [ "X" == "X$file" ]
then
	echo "Usage: git-history <path>"
	exit 1
fi

function difference_engine() {
	printf -- "---------- $1:$file\n\n"
	if [[ "$verbose" ]]
	then
		git shortlog "$1" | tail -n 2
		printf -- "----------\n\n"
	fi
	git --no-pager show "$1:$file"
	printf "\n\n"
}

export -f difference_engine

cd "`dirname \"$file\"`" && git rev-list --reverse --children --all -- "$file" | sed -e 's/ .*//' | xargs -n 1 -I % bash -c 'difference_engine %'