From 6372d2674cffcab8e6426cba80ef216c3ae1d0cf Mon Sep 17 00:00:00 2001
From: Tyler Hughes <artman41@gmail.com>
Date: Sun, 29 Jan 2023 18:02:44 +0000
Subject: Allow git + hex deps to be cached to XDG_CACHE_HOME

---
 test/Makefile     |  4 +++-
 test/core_deps.mk | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+), 1 deletion(-)

(limited to 'test')

diff --git a/test/Makefile b/test/Makefile
index f341345..82873f0 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -13,6 +13,8 @@ endif
 # Temporary application name, taken from rule name.
 
 APP = test_$(subst -,_,$@)
+CACHE_DIR = $(CURDIR)/$(APP).cache
+export CACHE_DIR
 
 # Erlang, quickly!
 
@@ -126,7 +128,7 @@ endef
 all:: core
 
 clean::
-	$t rm -rf erl_crash.dump packages/ $(filter-out test_rebar_git/,$(wildcard test_*/))
+	$t rm -rf erl_crash.dump packages/ $(filter-out test_rebar_git/,$(wildcard test_*/)) $(CACHE_DIR)
 
 init: clean
 	$i "Prefetch Rebar if necessary"
diff --git a/test/core_deps.mk b/test/core_deps.mk
index 1dbf7b8..1d7eefc 100644
--- a/test/core_deps.mk
+++ b/test/core_deps.mk
@@ -1476,3 +1476,54 @@ core-deps-test: init
 		{ok, Deps} = application:get_key($(APP), applications), \
 		false = lists:member(triq, Deps), \
 		halt()"
+
+# Checks that the cache is populate and reused
+core-deps-cache-creation: init
+	$i "Bootstrap a new OTP library named $(APP)"
+	$t mkdir $(APP)/
+	$t cp ../erlang.mk $(APP)/
+	$t $(MAKE) -C $(APP) -f erlang.mk bootstrap-lib $v
+	$t tmp=`mktemp` && { echo 'DEPS += cowlib' && echo 'CACHE_DEPS=1' && cat $(APP)/Makefile; } >> $$tmp && mv $$tmp $(APP)/Makefile
+	$i "Check that the Cache Directory doesn't exist yet"
+	$t test ! -d $(CACHE_DIR)
+	$i "Pull down & Cache the deps"
+	$t $(MAKE) -C $(APP) deps
+	$i "Check that the Cache Directory has been created"
+	$t test -d $(CACHE_DIR)
+	$i "Check that cowlib was cloned"
+	$t test -d $(CACHE_DIR)/gits/cowlib
+	$t $(MAKE) -C $(APP) distclean
+	$i "Check that cowlib is still in the cache"
+	$t test -d $(CACHE_DIR)/gits/cowlib
+	$i "Break cowlib git link so we're forced to use the cache"
+	$t echo 'dep_cowlib = git bad_url master' >> $(APP)/Makefile
+	$i "Pull down the deps from the cache"
+	$t $(MAKE) -C $(APP) deps
+	$i "Check that cowlib was cloned"
+	$t test -d $(CACHE_DIR)/gits/cowlib
+
+# Checks that 2 apps can reuse the cache
+#  with different versions of the same dep
+core-deps-cache-reuse: init
+	$i "Bootstrap a new OTP library named $(APP)_1"
+	$t mkdir $(APP)_1/
+	$t cp ../erlang.mk $(APP)_1/
+	$t $(MAKE) -C $(APP)_1 -f erlang.mk bootstrap-lib $v
+	$t tmp=`mktemp` && { echo 'DEPS += cowlib' && echo 'dep_cowlib = git $$(pkg_cowlib_repo) 1.0.0' && echo 'CACHE_DEPS=1' && cat $(APP)_1/Makefile; } >> $$tmp && mv $$tmp $(APP)_1/Makefile
+	$i "Bootstrap a new OTP library named $(APP)_2"
+	$t mkdir $(APP)_2/
+	$t cp ../erlang.mk $(APP)_2/
+	$t $(MAKE) -C $(APP)_2 -f erlang.mk bootstrap-lib $v
+	$t tmp=`mktemp` && { echo 'DEPS += cowlib' && echo 'dep_cowlib = git $$(pkg_cowlib_repo) 2.0.0' && echo 'CACHE_DEPS=1' && cat $(APP)_2/Makefile; } >> $$tmp && mv $$tmp $(APP)_2/Makefile
+	$i "Clone & Cache deps in $(APP)_1"
+	$t $(MAKE) -C $(APP)_1 deps
+	$i "Check that the Cache Directory has been created"
+	$t test -d $(CACHE_DIR)
+	$i "Check that cowlib was cloned"
+	$t test -d $(CACHE_DIR)/gits/cowlib
+	$i "Clone & Re-use cached deps in $(APP)_2"
+	$t $(MAKE) -C $(APP)_2 deps
+	$i "Check that $(APP)_1 cloned cowlib 1.x.x"
+	$t test "$$(cat $(APP)_1/deps/cowlib/.git/HEAD)" = "d544a494af4dbc810fc9c15eaf5cc050cced1501"
+	$i "Check that $(APP)_2 cloned cowlib 2.x.x"
+	$t test "$$(cat $(APP)_2/deps/cowlib/.git/HEAD)" = "bd37be4d3b065600c3b76b492535e76e5d413fc1"
\ No newline at end of file
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