From ab62d2c6a3b30410d5c1bda92e6bd43cebf8ba52 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karel=20Ko=C4=8D=C3=AD?= <cynerd@email.cz>
Date: Wed, 29 Aug 2018 19:49:30 +0200
Subject: turris4x: replace laminar locks with flock

---
 scripts/utils          | 58 +++++++++++---------------------------------------
 templates/turris4x.run | 26 +++++++++++-----------
 2 files changed, 26 insertions(+), 58 deletions(-)

diff --git a/scripts/utils b/scripts/utils
index 2d549e6..86edaa9 100644
--- a/scripts/utils
+++ b/scripts/utils
@@ -1,19 +1,5 @@
 # vim: ft=sh
 
-# Returns current job's id
-jobid() {
-	basename "$0" | sed 's/\.run$//'
-}
-
-# Return current template's id
-# If this is not template then this returns job's id
-templateid() {
-	basename "$(readlink -f "$0")" | sed 's/\.run$//'
-}
-
-TWORKSPACE="$HOME/workspace/$(templateid)"
-[ "$(jobid)" != "$(templateid)" ] || TWORKSPACE="$HOME/Workspace/notemplate"
-
 ## Simple echo wrappers #########################################################
 echo_stage() {
 	echo -e "\033[1;34m========== $@ ==========\033[0m ($(date))" >&2
@@ -29,24 +15,22 @@ echo_fail() {
 	return 1
 }
 
-## Cleanup handler ##############################################################
-_LAMINAR_LOCKS=""
-_handle_exit() {
-	# Release all locks
-	for LOCK in $_LAMINAR_LOCKS; do
-		laminarc release "$(jobid)-$LOCK"
-	done
+## Job and template IDs #########################################################
+# Returns current job's id
+jobid() {
+	basename "$0" | sed 's/\.run$//'
 }
-trap _handle_exit EXIT
 
-# Verify that we are running in process that was configured with trap (not in
-# subprocess)
-_check_trap() {
-	[ -n "$(trap -p EXIT)" ] || \
-		echo_fail "Unable to use this function as trap handling is not available in subprocess"
+# Return current template's id
+# If this is not template then this returns job's id
+templateid() {
+	basename "$(readlink -f "$0")" | sed 's/\.run$//'
 }
 
-#################################################################################
+TWORKSPACE="$HOME/workspace/$(templateid)"
+[ "$(jobid)" != "$(templateid)" ] || TWORKSPACE="$HOME/workspace/notemplate"
+
+## GIT ##########################################################################
 # Fetch bare git repository
 # First argument has to be a source URL
 # Second argument is path to directory to which will be repository cloned to.
@@ -102,21 +86,3 @@ git_clone() {
 	git checkout FETCH_HEAD
 	)
 }
-
-# Lock special lock for this job
-# Extension appended to lock name has to be provided as first argument
-laminar_self_lock() {
-	_check_trap
-	_LAMINAR_LOCKS="$_LAMINAR_LOCKS $1"
-	laminarc lock "$(jobid)-$1"
-	echo_debug "Locking $1"
-}
-
-# Unlock special lock for this job
-# Extension appended to lock name has to be provided as first argument
-laminar_self_release() {
-	_check_trap
-	laminarc release "$(jobid)-$1"
-	_LAMINAR_LOCKS="$(echo "$_LAMINAR_LOCKS" | sed "s/ $1//")"
-	echo_debug "Releasing $1"
-}
diff --git a/templates/turris4x.run b/templates/turris4x.run
index 9321d90..97aa745 100755
--- a/templates/turris4x.run
+++ b/templates/turris4x.run
@@ -5,16 +5,7 @@ set -e
 
 MAKE="make -j4 IS_TTY=1 BUILD_LOG=1"
 
-laminar_self_lock sdk
-curl "https://repo.turris.cz/$BOARD-$BRANCH/git-hash" > git-hash
-if [ -f "$WORKSPACE/openwrt-git-hash" ] && cmp -s git-hash "$WORKSPACE/openwrt-git-hash"; then
-	echo_info "Using previous version of SDK"
-	cp -a "$WORKSPACE/openwrt-sdk" openwrt
-	cd openwrt
-
-else
-	echo_info "Building new version of SDK"
-
+build_sdk() {
 	echo_stage "Get turris-build"
 	HASH="$(awk '/ \* turris-build\: /{print $3}' git-hash)"
 	git_fetch_t "https://gitlab.labs.nic.cz/turris/turris-build.git" turris-build "$HASH"
@@ -36,10 +27,21 @@ else
 	rm -rf "$WORKSPACE/openwrt-sdk"
 	cp -a openwrt "$WORKSPACE/openwrt-sdk"
 	cp git-hash "$WORKSPACE/openwrt-git-hash"
-	cd openwrt
+}
+
+copy_sdk() {
+	cp -a "$WORKSPACE/openwrt-sdk" openwrt
+}
 
+curl "https://repo.turris.cz/$BOARD-$BRANCH/git-hash" > git-hash
+if [ -f "$WORKSPACE/openwrt-git-hash" ] && cmp -s git-hash "$WORKSPACE/openwrt-git-hash"; then
+	echo_info "Using previous version of SDK"
+	flock --shared "$WORKSPACE/openwrt-sdk.lock" -c copy_sdk
+else
+	echo_info "Building new version of SDK"
+	flock --exclusive "$WORKSPACE/openwrt-sdk.lock" -c build_sdk
 fi
-laminar_self_release sdk
+cd openwrt
 
 echo_stage "Add our repository as feed"
 echo "src-git personal git@cynerd.cz:openwrt-personal-pkgs" >> feeds.conf
-- 
cgit v1.2.3