Merge first wave of gvfs-helper feature

Includes commits from these pull requests:

	#191
	#205
	#206
	#207
	#208
	#215
	#220
	#221

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>

.gitignore

@@ -73,6 +73,7 @@
 /git-gc
 /git-get-tar-commit-id
 /git-grep
+/git-gvfs-helper
 /git-hash-object
 /git-help
 /git-http-backend

Documentation/config.txt

@@ -378,6 +378,8 @@ include::config/gui.txt[]
 
 include::config/guitool.txt[]
 
+include::config/gvfs.txt[]
+
 include::config/help.txt[]
 
 include::config/http.txt[]

Documentation/config/core.txt

@@ -672,6 +672,9 @@ core.gvfs::
 		flag just blocks them from occurring at all.
 --
 
+core.useGvfsHelper::
+	TODO
+
 core.sparseCheckout::
 	Enable "sparse checkout" feature. See linkgit:git-sparse-checkout[1]
 	for more information.

Documentation/config/gvfs.txt

@@ -0,0 +1,5 @@
+gvfs.cache-server::
+	TODO
+
+gvfs.sharedcache::
+	TODO

Makefile

@@ -902,6 +902,7 @@ LIB_OBJS += gpg-interface.o
 LIB_OBJS += graph.o
 LIB_OBJS += grep.o
 LIB_OBJS += gvfs.o
+LIB_OBJS += gvfs-helper-client.o
 LIB_OBJS += hashmap.o
 LIB_OBJS += help.o
 LIB_OBJS += hex.o
@@ -1417,6 +1418,9 @@ else
 	endif
 	BASIC_CFLAGS += $(CURL_CFLAGS)
 
+	PROGRAM_OBJS += gvfs-helper.o
+	TEST_PROGRAMS_NEED_X += test-gvfs-protocol
+
 	REMOTE_CURL_PRIMARY = git-remote-http$X
 	REMOTE_CURL_ALIASES = git-remote-https$X git-remote-ftp$X git-remote-ftps$X
 	REMOTE_CURL_NAMES = $(REMOTE_CURL_PRIMARY) $(REMOTE_CURL_ALIASES)
@@ -2536,6 +2540,10 @@ $(REMOTE_CURL_PRIMARY): remote-curl.o http.o http-walker.o GIT-LDFLAGS $(GITLIBS
 	$(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) \
 		$(CURL_LIBCURL) $(EXPAT_LIBEXPAT) $(LIBS)
 
+git-gvfs-helper$X: gvfs-helper.o http.o GIT-LDFLAGS $(GITLIBS)
+	$(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) \
+		$(CURL_LIBCURL) $(EXPAT_LIBEXPAT) $(LIBS)
+
 $(LIB_FILE): $(LIB_OBJS)
 	$(QUIET_AR)$(RM) $@ && $(AR) $(ARFLAGS) $@ $^
 

builtin/index-pack.c

@@ -810,7 +810,7 @@ static void sha1_object(const void *data, struct object_entry *obj_entry,
 	if (startup_info->have_repository) {
 		read_lock();
 		collision_test_needed =
-			has_object_file_with_flags(oid, OBJECT_INFO_QUICK);
+			has_object_file_with_flags(oid, OBJECT_INFO_FOR_PREFETCH);
 		read_unlock();
 	}
 

cache.h

@@ -961,6 +961,9 @@ extern int precomposed_unicode;
 extern int protect_hfs;
 extern int protect_ntfs;
 extern const char *core_fsmonitor;
+extern int core_use_gvfs_helper;
+extern const char *gvfs_cache_server_url;
+extern struct strbuf gvfs_shared_cache_pathname;
 
 extern int core_apply_sparse_checkout;
 extern int core_sparse_checkout_cone;

config.c

@@ -21,6 +21,7 @@
 #include "color.h"
 #include "refs.h"
 #include "gvfs.h"
+#include "transport.h"
 
 struct config_source {
 	struct config_source *prev;
@@ -1380,6 +1381,11 @@ static int git_default_core_config(const char *var, const char *value, void *cb)
 		return 0;
 	}
 
+	if (!strcmp(var, "core.usegvfshelper")) {
+		core_use_gvfs_helper = git_config_bool(var, value);
+		return 0;
+	}
+
 	if (!strcmp(var, "core.sparsecheckout")) {
 		/* virtual file system relies on the sparse checkout logic so force it on */
 		if (core_virtualfilesystem)
@@ -1505,6 +1511,35 @@ static int git_default_mailmap_config(const char *var, const char *value)
 	return 0;
 }
 
+static int git_default_gvfs_config(const char *var, const char *value)
+{
+	if (!strcmp(var, "gvfs.cache-server")) {
+		const char *v2 = NULL;
+
+		if (!git_config_string(&v2, var, value) && v2 && *v2)
+			gvfs_cache_server_url = transport_anonymize_url(v2);
+		free((char*)v2);
+		return 0;
+	}
+
+	if (!strcmp(var, "gvfs.sharedcache") && value && *value) {
+		strbuf_setlen(&gvfs_shared_cache_pathname, 0);
+		strbuf_addstr(&gvfs_shared_cache_pathname, value);
+		if (strbuf_normalize_path(&gvfs_shared_cache_pathname) < 0) {
+			/*
+			 * Pretend it wasn't set.  This will cause us to
+			 * fallback to ".git/objects" effectively.
+			 */
+			strbuf_release(&gvfs_shared_cache_pathname);
+			return 0;
+		}
+		strbuf_trim_trailing_dir_sep(&gvfs_shared_cache_pathname);
+		return 0;
+	}
+
+	return 0;
+}
+
 int git_default_config(const char *var, const char *value, void *cb)
 {
 	if (starts_with(var, "core."))
@@ -1551,6 +1586,9 @@ int git_default_config(const char *var, const char *value, void *cb)
 		return 0;
 	}
 
+	if (starts_with(var, "gvfs."))
+		return git_default_gvfs_config(var, value);
+
 	/* Add other config variables here and to Documentation/config.txt. */
 	return 0;
 }

contrib/buildsystems/CMakeLists.txt

@@ -532,7 +532,7 @@ if(NOT CURL_FOUND)
 	add_compile_definitions(NO_CURL)
 	message(WARNING "git-http-push and git-http-fetch will not be built")
 else()
-	list(APPEND PROGRAMS_BUILT git-http-fetch git-http-push git-imap-send git-remote-http)
+	list(APPEND PROGRAMS_BUILT git-http-fetch git-http-push git-imap-send git-remote-http git-gvfs-helper)
 	if(CURL_VERSION_STRING VERSION_GREATER_EQUAL 7.34.0)
 		add_compile_definitions(USE_CURL_FOR_IMAP_SEND)
 	endif()
@@ -671,6 +671,9 @@ if(CURL_FOUND)
 		add_executable(git-http-push ${CMAKE_SOURCE_DIR}/http-push.c)
 		target_link_libraries(git-http-push http_obj common-main ${CURL_LIBRARIES} ${EXPAT_LIBRARIES})
 	endif()
+
+	add_executable(git-gvfs-helper ${CMAKE_SOURCE_DIR}/gvfs-helper.c)
+	target_link_libraries(git-gvfs-helper http_obj common-main ${CURL_LIBRARIES} )
 endif()
 
 set(git_builtin_extra
@@ -872,6 +875,20 @@ set(wrapper_scripts
 set(wrapper_test_scripts
 	test-fake-ssh test-tool)
 
+if(CURL_FOUND)
+	list(APPEND wrapper_test_scripts test-gvfs-protocol)
+
+	add_executable(test-gvfs-protocol ${CMAKE_SOURCE_DIR}/t/helper/test-gvfs-protocol.c)
+	target_link_libraries(test-gvfs-protocol common-main)
+
+	if(MSVC)
+		set_target_properties(test-gvfs-protocol
+					PROPERTIES RUNTIME_OUTPUT_DIRECTORY_DEBUG ${CMAKE_BINARY_DIR}/t/helper)
+		set_target_properties(test-gvfs-protocol
+					PROPERTIES RUNTIME_OUTPUT_DIRECTORY_RELEASE ${CMAKE_BINARY_DIR}/t/helper)
+	endif()
+endif()
+
 
 foreach(script ${wrapper_scripts})
 	file(STRINGS ${CMAKE_SOURCE_DIR}/wrap-for-bin.sh content NEWLINE_CONSUME)

credential.c

@@ -284,6 +284,8 @@ static int run_credential_helper(struct credential *c,
 	else
 		helper.no_stdout = 1;
 
+	helper.trace2_child_class = "cred";
+
 	if (start_command(&helper) < 0)
 		return -1;
 

environment.c

@@ -87,6 +87,9 @@ int protect_hfs = PROTECT_HFS_DEFAULT;
 #endif
 int protect_ntfs = PROTECT_NTFS_DEFAULT;
 const char *core_fsmonitor;
+int core_use_gvfs_helper;
+const char *gvfs_cache_server_url;
+struct strbuf gvfs_shared_cache_pathname = STRBUF_INIT;
 
 /*
  * The character that begins a commented line in user-editable file