test: allow running the tests under "prove"

You can run "make DEFAULT_TEST_TARGET=prove test" to run the test under
"prove" (or $(PROVE) if set).  The output is a bit easier to read when
running many tests in parallel.

Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net>
Liked-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Liked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/Makefile

@@ -11,16 +11,24 @@ SHELL_PATH ?= $(SHELL)
 PERL_PATH ?= /usr/bin/perl
 TAR ?= $(TAR)
 RM ?= rm -f
+PROVE ?= prove
+DEFAULT_TEST_TARGET ?= test
 
 # Shell quote;
 SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
 
 T = $(wildcard t[0-9][0-9][0-9][0-9]-*.sh)
 TSVN = $(wildcard t91[0-9][0-9]-*.sh)
 
-all: pre-clean
+all: $(DEFAULT_TEST_TARGET)
+
+test: pre-clean
 	$(MAKE) aggregate-results-and-cleanup
 
+prove: pre-clean
+	@echo "*** prove ***"; GIT_CONFIG=.git/config $(PROVE) --exec '$(SHELL_PATH_SQ)' $(GIT_PROVE_OPTS) $(T) :: $(GIT_TEST_OPTS)
+	$(MAKE) clean
+
 $(T):
 	@echo "*** $@ ***"; GIT_CONFIG=.git/config '$(SHELL_PATH_SQ)' $@ $(GIT_TEST_OPTS)
 

t/README

@@ -50,6 +50,12 @@ prove and other harnesses come with a lot of useful options. The
     # Repeat until no more failures
     $ prove -j 15 --state=failed,save ./t[0-9]*.sh
 
+You can give DEFAULT_TEST_TARGET=prove on the make command (or define it
+in config.mak) to cause "make test" to run tests under prove.
+GIT_PROVE_OPTS can be used to pass additional options, e.g.
+
+    $ make DEFAULT_TEST_TARGET=prove GIT_PROVE_OPTS='--timer --jobs 16' test
+
 You can also run each test individually from command line, like this:
 
     $ sh ./t3010-ls-files-killed-modified.sh