git-svn: make the $GIT_DIR/svn/*/revs directory obsolete

This is a very intrusive change, so I've beefed up the tests
significantly.  Added 'full-test' a target to the Makefile,
to test different possible configurations.  This is intended
for maintainers only.  Users should only be concerned with
'test' succeeding.

We now have a very simple custom database format for handling
mapping of svn revisions => git commits.  Of course, we're
not really using it yet, either.

Also disabled automatic branch-finding on new trees for now.
It's too easily broken.  revisions_eq() function should be
helpful for branch detection.

Also removed an extra assertion in fetch_cmd() that wasn't
correctly done.  This bug was found by full-test.

Signed-off-by: Eric Wong <normalperson@yhbt.net>

contrib/git-svn/Makefile

@@ -29,8 +29,16 @@ git-svn.html : git-svn.txt
 	asciidoc -b xhtml11 -d manpage \
 		-f ../../Documentation/asciidoc.conf $<
 test: git-svn
-	cd t && $(SHELL) ./t0000-contrib-git-svn.sh
-	cd t && $(SHELL) ./t0001-contrib-git-svn-props.sh
+	cd t && $(SHELL) ./t0000-contrib-git-svn.sh $(TEST_FLAGS)
+	cd t && $(SHELL) ./t0001-contrib-git-svn-props.sh $(TEST_FLAGS)
+
+full-test:
+	$(MAKE) test GIT_SVN_NO_LIB=1 GIT_SVN_NO_OPTIMIZE_COMMITS=1
+	$(MAKE) test GIT_SVN_NO_LIB=0 GIT_SVN_NO_OPTIMIZE_COMMITS=1
+	$(MAKE) test GIT_SVN_NO_LIB=1 GIT_SVN_NO_OPTIMIZE_COMMITS=0 \
+							LC_ALL=en_US.UTF-8
+	$(MAKE) test GIT_SVN_NO_LIB=0 GIT_SVN_NO_OPTIMIZE_COMMITS=0 \
+							LC_ALL=en_US.UTF-8
 
 clean:
 	rm -f git-svn *.xml *.html *.1