#!/bin/bash

# This script automatically sets the version and short version string of
# an Xcode project from the Git repository containing the project.
#
# To use this script in Xcode, add the script's path to a "Run Script" build
# phase for your application target.

set -o errexit
set -o nounset

# First, check for git in $PATH
hash git 2>/dev/null || { echo >&2 "Git required, not installed.  Aborting build number update script."; exit 0; }

# Alternatively, we could use Xcode's copy of the Git binary,
# but old Xcodes don't have this.
#GIT=$(xcrun -find git)

# Run Script build phases that operate on product files of the target that defines them should use the value of this build setting [TARGET_BUILD_DIR]. But Run Script build phases that operate on product files of other targets should use ?BUILT_PRODUCTS_DIR? instead.
INFO_PLIST="${TARGET_BUILD_DIR}/${INFOPLIST_PATH}"

if [[ $(git ls-files -m "StatusIm/Info.plist") = *"Info.plist"* ]]; then
    echo "version was set in Info.plist"
else
    RELEASE_VERSION=$(cat ../VERSION)
    # Build version (closest-tag-or-branch "-" commits-since-tag "-" short-hash dirty-flag)
    BUILD_VERSION="${RELEASE_VERSION}-$(git describe --always --dirty=+)"

    # Use the latest tag for short version (expected tag format "vn[.n[.n]]")
    # or if there are no tags, we make up version 0.0.<commit count>
    LATEST_TAG=${RELEASE_VERSION} || LATEST_TAG="HEAD"
    if [ $LATEST_TAG = "HEAD" ]
    then COMMIT_COUNT=$(git rev-list --count HEAD)
        LATEST_TAG="0.0.$COMMIT_COUNT"
        COMMIT_COUNT_SINCE_TAG=0
    else
        VERSION_CHANGE_COMMIT=$(git log -n 1 --pretty=format:%H -- ../VERSION)
        COMMIT_COUNT_SINCE_TAG=$(git rev-list --count ${VERSION_CHANGE_COMMIT}..)
        LATEST_TAG=${LATEST_TAG##v} # Remove the "v" from the front of the tag
    fi
    if [ $COMMIT_COUNT_SINCE_TAG = 0 ]; then
        SHORT_VERSION="$LATEST_TAG"
    else
        # increment final digit of tag and append "d" + commit-count-since-tag
        # e.g. commit after 1.0 is 1.1d1, commit after 1.0.0 is 1.0.1d1
        # this is the bit that requires /bin/bash
        OLD_IFS=$IFS
        IFS="."
        VERSION_PARTS=($LATEST_TAG)
        LAST_PART=$((${#VERSION_PARTS[@]}-1))
        VERSION_PARTS[$LAST_PART]=$((${VERSION_PARTS[${LAST_PART}]}+1))
        SHORT_VERSION="${VERSION_PARTS[*]}d${COMMIT_COUNT_SINCE_TAG}"
        IFS=$OLD_IFS
    fi

    # For debugging:
    echo "BUILD VERSION: $BUILD_VERSION"
    echo "LATEST_TAG: $LATEST_TAG"
    echo "COMMIT_COUNT_SINCE_TAG: $COMMIT_COUNT_SINCE_TAG"
    echo "SHORT VERSION: $SHORT_VERSION"

    /usr/libexec/PlistBuddy -c "Add :CFBundleBuildVersion string $BUILD_VERSION" "$INFO_PLIST" 2>/dev/null || /usr/libexec/PlistBuddy -c "Set :CFBundleBuildVersion $BUILD_VERSION" "$INFO_PLIST"
    /usr/libexec/PlistBuddy -c "Set :CFBundleShortVersionString $SHORT_VERSION" "$INFO_PLIST"
fi