#!/usr/bin/env bash

# extract current branch name
BRANCH=$(git rev-parse --abbrev-ref HEAD 2> /dev/null)

# get name of the most top folder of current directory, used for the
# output filename
ARCHIVE_NAME=$(basename $(pwd))

if [[ $BRANCH = tags* ]]; then
    BRANCH=$(git describe)
    echo Building for tag \"$BRANCH\"
    FILENAME=$ARCHIVE_NAME.$BRANCH.zip
else
    echo Building archive on branch \"$BRANCH\"
    # get a version string, so archives will not be overwritten when creating
    # many of them
    VERSION=$(git describe --always --long)
    # if not on master append branch name into the filename
    if [ "$BRANCH" = $(git_extra_default_branch) ]; then
        FILENAME=$ARCHIVE_NAME.$VERSION.zip
    else
        FILENAME=$ARCHIVE_NAME.$VERSION.$BRANCH.zip
    fi
fi

# rename invalid chars for the file path
FILENAME=${FILENAME//\//-}
FILENAME=${FILENAME//\\/-}
# combine path and filename
OUTPUT=$(pwd)/$FILENAME

# building archive
git archive --format zip --output $OUTPUT $BRANCH

# also display size of the resulting file
echo Saved to \"$FILENAME\" \(`du -h $OUTPUT | cut -f1`\)