Git as a key/value store

README.md

git-store

$ git init mystore
$ cd mystore

$ git store set foo "this is foo"
$ git store get foo
this is foo

$ echo "this is bar" | git store set bar
$ git store get bar
this is bar

$ git store keys
bar
foo

$ git store delete bar
$ git store keys
foo

$ git store clear
$ git store keys

git-store

#!/usr/bin/env bash

function _git_store_set() {
    key=$1
    shift
    value=$@

    if [ -z "$value" ]; then
        value=$(cat)
    fi

    blob=$(echo "$value" | git hash-object -w --stdin)
    git update-index --add --cacheinfo 100644 $blob $key
    _git_store_save "set '$key'"
}

function _git_store_get() {
    key=$1
    value=$(git show master:$1 2> /dev/null)

    if [ $? -eq 0 ]; then
        echo "$value"
    fi
}

function _git_store_delete() {
    key=$1
    git update-index --remove $key
    _git_store_save "delete '$key'"
}

function _git_store_keys() {
    git ls-tree --name-only master
}

function _git_store_clear() {
    keys=$(_git_store_keys)
    for key in $keys; do
        git update-index --remove $key
    done
    _git_store_save "clear"
}

function _git_store_save() {
    message=$1
    tree=$(git write-tree)
    master=$(git show-ref refs/heads/master | cut -d ' ' -f 1)

    if [ -z $master ]; then
        commit=$(echo $message | git commit-tree $tree)
    else
        commit=$(echo $message | git commit-tree $tree -p $master)
    fi

    git update-ref refs/heads/master $commit
}

eval "_git_store_$@"