Add exif info about git-annex managed photos in git-notes under the namespace "pictures"

git-photo

#!/usr/bin/env bash

set -eu

COMMAND=''

usage() {
    cat<<HELP
    usage: git photo <add|show|rm> <file>
HELP
}

do_rm() {
    local sum="$1"

    set -x
    git notes --ref=pictures remove "$sum"
    set +x
}

do_show() {
    local sum="$1"

    set -x
    git notes --ref=pictures show "$sum"
    set +x
}

do_add() {
        local sum="$1"
        local exif

        # Explode if exiftool isn't a thing
        command -v exiftool &>/dev/null

        exif=$(exiftool -S \
            -filename \
            -filetypeextension \
            -make \
            -model \
            -lensid \
            -focallength \
            -fnumber \
            -iso "$file")

        set -x
        git notes --ref=pictures add -m "$exif" "$sum"
        set +x
}


main() {
    subcommand="$1"
    shift

    for cmd in 'add' 'show' 'rm'; do
        if [[ "$subcommand" == "$cmd" ]]; then
            COMMAND="do_${cmd}"
        fi
    done

    if [[ -z "$COMMAND" ]]; then
        usage
        exit 1
    fi

    for file in "$@"; do
        content=$( readlink "$file" )
        sum=$( printf 'blob %s\0%s' "${#content}" "$content" | sha1sum )
        sum="${sum:0:32}"

        $COMMAND "$sum"
    done
}

main "$@"