#!/bin/bash

# Checking out the sources of an official chromium release,
# by Eric Hameleers <alien at slackware.com>:
# In a working directory, the script creates three directories:
# - depot_tools: this contains all the tools needed for creating the tarball
# - src: here almost 7 GB of sourcecode will be checked out
# - output: here the chromium-${VERSION}.tar.xz source tarball will be created.

# --------------------------------------------------------------------------
# Another example:
# https://gitlab.archlinux.org/archlinux/packaging/packages/chromium/-/blob/main/fetch-chromium-release?ref_type=heads
# --------------------------------------------------------------------------

set -e

readonly VERSION=$1
if [[ -z $VERSION ]]; then
  echo >&2 'No version given as an argument'
  exit 1
fi

# Some variables:

TMP=${TMP:-"/tmp"}
WORKING_DIR="$TMP/chromium_src"

DEPOT_TOOLS_REPO="https://chromium.googlesource.com/chromium/tools/depot_tools.git"
CHROMIUM_REPO="https://chromium.googlesource.com/chromium/src"
RELEASES_URL="https://src.chromium.org/chrome/releases"

# The actual work (takes a while to checkout 7 GB of source and pack it up:

rm -rf ${WORKING_DIR}
mkdir -p ${WORKING_DIR}
cd ${WORKING_DIR}

echo "-- [$(date +%Y%m%d_%H%M)] starting the work"
# Clone the tools:
git clone --depth=1 ${DEPOT_TOOLS_REPO}
export PATH="$PWD/depot_tools:$PATH" DEPOT_TOOLS_UPDATE=0

# Use gclient to fetch the source and all the other required stuff:
gclient config --name src ${CHROMIUM_REPO}.git@${VERSION}
echo "target_os = [ 'linux' ]" >> .gclient
# Run the Chromium-specific hooks, which will download additional binaries
# and other stuff we need:
gclient sync --no-history --nohooks
gclient runhooks
# Also needed:
src/third_party/node/update_npm_deps
find src/third_party/jdk/current -type f -delete

# Create the tarball:
mv src chromium-$VERSION
mkdir output
tar -Jcf output/chromium-$VERSION.tar.xz chromium-$VERSION
echo "-- [$(date +%Y%m%d_%H%M)] Tarball for chromium-$VERSION created in $(pwd)/output/"