Revert "Make it possible to set up libgit directly (instead of from the environment)"

This reverts commit 0270083ded143fd49841e3d3d0cac5eb06081d2a.

7 files changed, 24 insertions, 114 deletions

diff --git a/cache.h b/cache.h
index 2b8fafbd63..af7740258d 100644
--- a/cache.h
+++ b/cache.h
@@ -117,9 +117,6 @@ extern unsigned int active_nr, active_alloc, active_cache_changed;
 extern struct cache_tree *active_cache_tree;
 extern int cache_errno;
 
-extern void setup_git(char *new_git_dir, char *new_git_object_dir,
-                      char *new_git_index_file, char *new_git_graft_file);
-
 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
diff --git a/commit.c b/commit.c
index 4d5c0c2945..77f0ca175c 100644
--- a/commit.c
+++ b/commit.c
@@ -163,14 +163,6 @@ int register_commit_graft(struct commit_graft *graft, int ignore_dups)
 	return 0;
 }
 
-void free_commit_grafts(void)
-{
-	int pos = commit_graft_nr;
-	while (pos >= 0)
-		free(commit_graft[pos--]);
-	commit_graft_nr = 0;
-}
-
 struct commit_graft *read_graft_line(char *buf, int len)
 {
 	/* The format is just "Commit Parent1 Parent2 ...\n" */
@@ -223,18 +215,11 @@ int read_graft_file(const char *graft_file)
 static void prepare_commit_graft(void)
 {
 	static int commit_graft_prepared;
-	static char *last_graft_file;
-	char *graft_file = get_graft_file();
-
-	if (last_graft_file) {
-		if (!strcmp(graft_file, last_graft_file))
-			return;
-		free_commit_grafts();
-	}
-	if (last_graft_file)
-		free(last_graft_file);
-	last_graft_file = strdup(graft_file);
+	char *graft_file;
 
+	if (commit_graft_prepared)
+		return;
+	graft_file = get_graft_file();
 	read_graft_file(graft_file);
 	commit_graft_prepared = 1;
 }
diff --git a/environment.c b/environment.c
index 1ce34118dd..87162b2572 100644
--- a/environment.c
+++ b/environment.c
@@ -25,61 +25,28 @@ int zlib_compression_level = Z_DEFAULT_COMPRESSION;
 int pager_in_use;
 int pager_use_color = 1;
 
-static int dyn_git_object_dir, dyn_git_index_file, dyn_git_graft_file;
 static char *git_dir, *git_object_dir, *git_index_file, *git_refs_dir,
 	*git_graft_file;
-
-void setup_git(char *new_git_dir, char *new_git_object_dir,
-               char *new_git_index_file, char *new_git_graft_file)
+static void setup_git_env(void)
 {
-	git_dir = new_git_dir;
+	git_dir = getenv(GIT_DIR_ENVIRONMENT);
 	if (!git_dir)
 		git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
-
-	if (dyn_git_object_dir)
-		free(git_object_dir);
-	git_object_dir = new_git_object_dir;
+	git_object_dir = getenv(DB_ENVIRONMENT);
 	if (!git_object_dir) {
 		git_object_dir = xmalloc(strlen(git_dir) + 9);
 		sprintf(git_object_dir, "%s/objects", git_dir);
-		dyn_git_object_dir = 1;
-	} else {
-		dyn_git_object_dir = 0;
 	}
-
-	if (git_refs_dir)
-		free(git_refs_dir);
 	git_refs_dir = xmalloc(strlen(git_dir) + 6);
 	sprintf(git_refs_dir, "%s/refs", git_dir);
-
-	if (dyn_git_index_file)
-		free(git_index_file);
-	git_index_file = new_git_index_file;
+	git_index_file = getenv(INDEX_ENVIRONMENT);
 	if (!git_index_file) {
 		git_index_file = xmalloc(strlen(git_dir) + 7);
 		sprintf(git_index_file, "%s/index", git_dir);
-		dyn_git_index_file = 1;
-	} else {
-		dyn_git_index_file = 0;
 	}
-
-	if (dyn_git_graft_file)
-		free(git_graft_file);
-	git_graft_file = new_git_graft_file;
-	if (!git_graft_file) {
+	git_graft_file = getenv(GRAFT_ENVIRONMENT);
+	if (!git_graft_file)
 		git_graft_file = strdup(git_path("info/grafts"));
-		dyn_git_graft_file = 1;
-	} else {
-		dyn_git_graft_file = 0;
-	}
-}
-
-static void setup_git_env(void)
-{
-	setup_git(getenv(GIT_DIR_ENVIRONMENT),
-	          getenv(DB_ENVIRONMENT),
-	          getenv(INDEX_ENVIRONMENT),
-	          getenv(GRAFT_ENVIRONMENT));
 }
 
 char *get_git_dir(void)
diff --git a/perl/Git.pm b/perl/Git.pm
index 9da15e9c8c..9ce9fcdd3e 100644
--- a/perl/Git.pm
+++ b/perl/Git.pm
@@ -98,8 +98,6 @@ XSLoader::load('Git', $VERSION);
 
 }
 
-my $instance_id = 0;
-
 
 =head1 CONSTRUCTORS
 
@@ -217,7 +215,7 @@ sub repository {
 		delete $opts{Directory};
 	}
 
-	$self = { opts => \%opts, id => $instance_id++ };
+	$self = { opts => \%opts };
 	bless $self, $class;
 }
 
@@ -835,10 +833,11 @@ sub _call_gate {
 	if (defined $self) {
 		# XXX: We ignore the WorkingCopy! To properly support
 		# that will require heavy changes in libgit.
-		# For now, when we will need to do it we could temporarily
-		# chdir() there and then chdir() back after the call is done.
 
-		xs__call_gate($self->{id}, $self->repo_path());
+		# XXX: And we ignore everything else as well. libgit
+		# at least needs to be extended to let us specify
+		# the $GIT_DIR instead of looking it up in environment.
+		#xs_call_gate($self->{opts}->{Repository});
 	}
 
 	# Having to call throw from the C code is a sure path to insanity.
diff --git a/perl/Git.xs b/perl/Git.xs
index 6ed26a29b8..2bbec4365f 100644
--- a/perl/Git.xs
+++ b/perl/Git.xs
@@ -52,21 +52,7 @@ BOOT:
 }
 
 
-void
-xs__call_gate(repoid, git_dir)
-	long repoid;
-	char *git_dir;
-CODE:
-{
-	static long last_repoid;
-	if (repoid != last_repoid) {
-		setup_git(git_dir,
-		          getenv(DB_ENVIRONMENT),
-		          getenv(INDEX_ENVIRONMENT),
-		          getenv(GRAFT_ENVIRONMENT));
-		last_repoid = repoid;
-	}
-}
+# /* TODO: xs_call_gate(). See Git.pm. */
 
 
 char *
diff --git a/sha1_file.c b/sha1_file.c
index ed52d71a1b..842a6f3ae8 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -126,22 +126,16 @@ static void fill_sha1_path(char *pathbuf, const unsigned char *sha1)
 char *sha1_file_name(const unsigned char *sha1)
 {
 	static char *name, *base;
-	static const char *last_objdir;
-	const char *sha1_file_directory = get_object_directory();
 
-	if (!last_objdir || strcmp(last_objdir, sha1_file_directory)) {
+	if (!base) {
+		const char *sha1_file_directory = get_object_directory();
 		int len = strlen(sha1_file_directory);
-		if (base)
-			free(base);
 		base = xmalloc(len + 60);
 		memcpy(base, sha1_file_directory, len);
 		memset(base+len, 0, 60);
 		base[len] = '/';
 		base[len+3] = '/';
 		name = base + len + 1;
-		if (last_objdir)
-			free((char *) last_objdir);
-		last_objdir = strdup(sha1_file_directory);
 	}
 	fill_sha1_path(name, sha1);
 	return base;
@@ -151,20 +145,14 @@ char *sha1_pack_name(const unsigned char *sha1)
 {
 	static const char hex[] = "0123456789abcdef";
 	static char *name, *base, *buf;
-	static const char *last_objdir;
-	const char *sha1_file_directory = get_object_directory();
 	int i;
 
-	if (!last_objdir || strcmp(last_objdir, sha1_file_directory)) {
+	if (!base) {
+		const char *sha1_file_directory = get_object_directory();
 		int len = strlen(sha1_file_directory);
-		if (base)
-			free(base);
 		base = xmalloc(len + 60);
 		sprintf(base, "%s/pack/pack-1234567890123456789012345678901234567890.pack", sha1_file_directory);
 		name = base + len + 11;
-		if (last_objdir)
-			free((char *) last_objdir);
-		last_objdir = strdup(sha1_file_directory);
 	}
 
 	buf = name;
@@ -182,20 +170,14 @@ char *sha1_pack_index_name(const unsigned char *sha1)
 {
 	static const char hex[] = "0123456789abcdef";
 	static char *name, *base, *buf;
-	static const char *last_objdir;
-	const char *sha1_file_directory = get_object_directory();
 	int i;
 
-	if (!last_objdir || strcmp(last_objdir, sha1_file_directory)) {
+	if (!base) {
+		const char *sha1_file_directory = get_object_directory();
 		int len = strlen(sha1_file_directory);
-		if (base)
-			free(base);
 		base = xmalloc(len + 60);
 		sprintf(base, "%s/pack/pack-1234567890123456789012345678901234567890.idx", sha1_file_directory);
 		name = base + len + 11;
-		if (last_objdir)
-			free((char *) last_objdir);
-		last_objdir = strdup(sha1_file_directory);
 	}
 
 	buf = name;
diff --git a/sha1_name.c b/sha1_name.c
index ddabb045a2..c5a05faeb6 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -12,21 +12,15 @@ static int find_short_object_filename(int len, const char *name, unsigned char *
 	char hex[40];
 	int found = 0;
 	static struct alternate_object_database *fakeent;
-	static const char *last_objdir;
-	const char *objdir = get_object_directory();
 
-	if (!last_objdir || strcmp(last_objdir, objdir)) {
+	if (!fakeent) {
+		const char *objdir = get_object_directory();
 		int objdir_len = strlen(objdir);
 		int entlen = objdir_len + 43;
-		if (fakeent)
-			free(fakeent);
 		fakeent = xmalloc(sizeof(*fakeent) + entlen);
 		memcpy(fakeent->base, objdir, objdir_len);
 		fakeent->name = fakeent->base + objdir_len + 1;
 		fakeent->name[-1] = '/';
-		if (last_objdir)
-			free((char *) last_objdir);
-		last_objdir = strdup(objdir);
 	}
 	fakeent->next = alt_odb_list;