From 14480732a8194c8e1fe54ef83e67c3838be276bd Mon Sep 17 00:00:00 2001
From: Alex Karle <alex@karle.co>
Date: Wed, 13 May 2020 00:17:33 -0400
Subject: [PATCH] make: Add proper dependency logic to build/release

As mentioned in the top comment, building webpack take both over a
minute on my development laptop and gets my fans spinning real good.

So for cutting a release where no public content has changed, it's
reallllly painful to have to sit through that! (ok, I exaggerate, but my
hobby time is precious!)

Thankfully, this is exactly what make was built for -- only building
that which has changed. Throw in a couple `find`'s and some dependency
magic with timestamp files and boom, we don't have to rebuild webpack
anymore!
---
 .gitignore |  1 +
 Makefile   | 23 ++++++++++++++++++++---
 build.sh   |  9 ---------
 3 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/.gitignore b/.gitignore
index 8366403..3ddb444 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ public/asset
 tags
 /build/
 /build.*/
+.public.ts
diff --git a/Makefile b/Makefile
index cc6bc2b..538a5b3 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,8 @@
+# Rebuilding the webpack for a server-only release is a painful
+# few minutes on my poor old thinkpad. We can do better
+PUBLIC_FILES := $(shell find public -type f)
+LIB_FILES := $(shell find lib -type f)
+
 .PHONY: all
 all: test tags
 
@@ -10,12 +15,24 @@ test:
 	perl -c gloat.pl
 	perl t/Rules.t
 
-.PHONY: release
-release: test
+# If no public files have changed, don't rebuild the webpack!
+# We make this timestamp file the dependency for build to
+# ensure we don't do it too often...
+.public.ts: $(PUBLIC_FILES)
 	./build.sh
+	touch .public.ts
+
+# Only rebuild if any of public/ or the Perl stuff has changed
+build: .public.ts $(LIB_FILES) gloat.pl
+	mkdir -p build
+	cp -a gloat.pl public lib build
+	@echo ">>> Build Success! <<<"
+
+.PHONY: release
+release: build test
 	scp -r build/* www@euchre.live:/var/www/euchre-live
 	ssh www@euchre.live sh /var/www/deploy.sh
 
 .PHONY: clean
 clean:
-	rm -rf build build.1*
+	rm -rf build
diff --git a/build.sh b/build.sh
index 64310f8..529d909 100755
--- a/build.sh
+++ b/build.sh
@@ -15,12 +15,3 @@ export MOJO_WEBPACK_BUILD=1
 
 # Run an effectively no-op (non daemonizing) command to kick it off
 ./gloat.pl routes
-
-# Make the build directory
-[ -d "build" ] && mv build build.`date +%s`
-mkdir build
-cp -a public lib gloat.pl build
-
-echo "---------------------------------------------------------------"
-echo "                        Build Success!"
-echo "---------------------------------------------------------------"
--
libgit2 1.1.1