#!/bin/sh
# vim: set ts=4:
set -eu

. "$(dirname "$0")"/common.sh

# Prints names of top-level directories (i.e. repositories) that has been
# changed/created in the specified revisions.
changed_repos() {
	local commit_ish="$1"
	local repos="$(find * -type d -maxdepth 0 ! -name '.*')"

	# Print names of dirs in the current directory (it's *not* recursive)
	# that contain some changes and consider only dirs listed in $repos.
	git diff-tree --name-only "$commit_ish" -- $repos
}

# Prints names of repo's subdirs (i.e. abuilds) that contains APKBUILDs which
# has been changed/created in the specified revisions. The abuild names are
# printed in a build order.
changed_abuilds() {
	local repo="$1"
	local commit_ish="$2"

	# Get names of repo's subdirectories with modified APKBUILD,
	# but ignore deleted ones.
	local aports="$(git diff-tree -r --relative="$repo" --name-only --diff-filter=ACMR \
					"$commit_ish" -- '*APKBUILD' | xargs -I% dirname % | xargs)"

	# Sort abuilds by build order.
	ap builddirs -d "$(pwd)/$repo" $aports 2>/dev/null | xargs -I% basename %
}


cd "$CLONE_DIR"

# Workarounds for oddities of TRAVIS_COMMIT_RANGE that:
#   - may be empty when pushing single commit,
#   - uses triple-dot range instead of double-dot that we need,
#   - contains SHA of old (unreachable) commit when rebasing.
commit_range="$(echo "${TRAVIS_COMMIT_RANGE:-}" | sed -E 's/\.{3}/../')"
if ! git rev-parse "$commit_range" >/dev/null 2>&1; then
	commit_range="$(git rev-parse HEAD^1)..HEAD"
fi

failed_pkgs=''
successful_pkgs=''


title "Building abuilds that has been modified/added between $commit_range\n"

echo 'Diffstat:'
git --no-pager diff --color --stat "$commit_range"

for repo in $(changed_repos "$commit_range"); do
	for pkgname in $(changed_abuilds "$repo" "$commit_range"); do
		qname="$repo/$pkgname"

		fold_start "$pkgname" "Building package $qname"

		if APKBUILD="$qname/APKBUILD" abuild -fr; then
			successful_pkgs="$successful_pkgs $qname"
		else
			failed_pkgs="$failed_pkgs $qname"
		fi
		fold_end "$pkgname"
	done
done

printf '\n----\n'
if [ -n "$successful_pkgs" ]; then
	print -s1 -c2 "Successfully build packages:$successful_pkgs\n"
fi
if [ -n "$failed_pkgs" ]; then
	die "Failed to build packages:$failed_pkgs"

elif [ -z "$successful_pkgs" ]; then
	print -s1 -c3 'No packages found to be built.'
fi