X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=setup.c;h=3653092ab657942639b6183fb04b3af783b77e7a;hb=e90fdc39b6903502192b2dd11e5503cea721a1ad;hp=14f62c42e3ac6ead75d4963ee705b9a110da3de0;hpb=5bd148bfe8a4f2df8487e029cd4ee6809bc4c963;p=thirdparty%2Fgit.git

diff --git a/setup.c b/setup.c
index 14f62c42e3..3653092ab6 100644
--- a/setup.c
+++ b/setup.c
@@ -1,4 +1,8 @@
 #include "cache.h"
+#include "dir.h"
+
+static int inside_git_dir = -1;
+static int inside_work_tree = -1;
 
 const char *prefix_path(const char *prefix, int len, const char *path)
 {
@@ -95,7 +99,7 @@ void verify_non_filename(const char *prefix, const char *arg)
 	const char *name;
 	struct stat st;
 
-	if (is_inside_git_dir())
+	if (!is_inside_work_tree() || is_inside_git_dir())
 		return;
 	if (*arg == '-')
 		return; /* flag */
@@ -170,30 +174,71 @@ static int is_git_directory(const char *suspect)
 	return 1;
 }
 
-static int inside_git_dir = -1;
-
 int is_inside_git_dir(void)
 {
-	if (inside_git_dir < 0) {
-		char buffer[1024];
-
-		if (is_bare_repository())
-			return (inside_git_dir = 1);
-		if (getcwd(buffer, sizeof(buffer))) {
-			const char *git_dir = get_git_dir(), *cwd = buffer;
-			while (*git_dir && *git_dir == *cwd) {
-				git_dir++;
-				cwd++;
-			}
-			inside_git_dir = !*git_dir;
-		} else
-			inside_git_dir = 0;
-	}
+	if (inside_git_dir < 0)
+		inside_git_dir = is_inside_dir(get_git_dir());
 	return inside_git_dir;
 }
 
+int is_inside_work_tree(void)
+{
+	if (inside_work_tree < 0)
+		inside_work_tree = is_inside_dir(get_git_work_tree());
+	return inside_work_tree;
+}
+
+/*
+ * If no worktree was given, and we are outside of a default work tree,
+ * now is the time to set it.
+ *
+ * In other words, if the user calls git with something like
+ *
+ *	git --git-dir=/some/where/else/.git bla
+ *
+ * default to /some/where/else as working directory; if the specified
+ * git-dir does not end in "/.git", the cwd is used as working directory.
+ */
+const char *set_work_tree(const char *dir)
+{
+	char dir_buffer[PATH_MAX];
+	static char buffer[PATH_MAX + 1], *rel = NULL;
+	int len, postfix_len = strlen(DEFAULT_GIT_DIR_ENVIRONMENT) + 1;
+
+	/* strip the variable 'dir' of the postfix "/.git" if it has it */
+	len = strlen(dir);
+	if (len > postfix_len && !strcmp(dir + len - postfix_len,
+				"/" DEFAULT_GIT_DIR_ENVIRONMENT)) {
+			strncpy(dir_buffer, dir, len - postfix_len);
+
+		/* are we inside the default work tree? */
+		rel = get_relative_cwd(buffer, sizeof(buffer), dir_buffer);
+	}
+	/* if rel is set, the cwd is _not_ the current working tree */
+	if (rel && *rel) {
+		if (!is_absolute_path(dir))
+			set_git_dir(make_absolute_path(dir));
+		dir = dir_buffer;
+		chdir(dir);
+		strcat(rel, "/");
+		inside_git_dir = 0;
+	} else {
+		rel = NULL;
+		dir = getcwd(buffer, sizeof(buffer));
+	}
+	git_work_tree_cfg = xstrdup(dir);
+	inside_work_tree = 1;
+
+	return rel;
+}
+
+/*
+ * We cannot decide in this function whether we are in the work tree or
+ * not, since the config can only be read _after_ this function was called.
+ */
 const char *setup_git_directory_gently(int *nongit_ok)
 {
+	const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
 	static char cwd[PATH_MAX+1];
 	const char *gitdirenv;
 	int len, offset;
@@ -207,8 +252,11 @@ const char *setup_git_directory_gently(int *nongit_ok)
 	if (gitdirenv) {
 		if (PATH_MAX - 40 < strlen(gitdirenv))
 			die("'$%s' too big", GIT_DIR_ENVIRONMENT);
-		if (is_git_directory(gitdirenv))
+		if (is_git_directory(gitdirenv)) {
+			if (!work_tree_env)
+				return set_work_tree(gitdirenv);
 			return NULL;
+		}
 		if (nongit_ok) {
 			*nongit_ok = 1;
 			return NULL;
@@ -216,23 +264,32 @@ const char *setup_git_directory_gently(int *nongit_ok)
 		die("Not a git repository: '%s'", gitdirenv);
 	}
 
-	if (!getcwd(cwd, sizeof(cwd)-1) || cwd[0] != '/')
+	if (!getcwd(cwd, sizeof(cwd)-1))
 		die("Unable to read current working directory");
 
+	/*
+	 * Test in the following order (relative to the cwd):
+	 * - .git/
+	 * - ./ (bare)
+	 * - ../.git/
+	 * - ../ (bare)
+	 * - ../../.git/
+	 *   etc.
+	 */
 	offset = len = strlen(cwd);
 	for (;;) {
-		if (is_git_directory(".git"))
+		if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
 			break;
+		if (is_git_directory(".")) {
+			inside_git_dir = 1;
+			if (!work_tree_env)
+				inside_work_tree = 0;
+			setenv(GIT_DIR_ENVIRONMENT, ".", 1);
+			return NULL;
+		}
 		chdir("..");
 		do {
 			if (!offset) {
-				if (is_git_directory(cwd)) {
-					if (chdir(cwd))
-						die("Cannot come back to cwd");
-					setenv(GIT_DIR_ENVIRONMENT, cwd, 1);
-					inside_git_dir = 1;
-					return NULL;
-				}
 				if (nongit_ok) {
 					if (chdir(cwd))
 						die("Cannot come back to cwd");
@@ -244,6 +301,10 @@ const char *setup_git_directory_gently(int *nongit_ok)
 		} while (cwd[--offset] != '/');
 	}
 
+	inside_git_dir = 0;
+	if (!work_tree_env)
+		inside_work_tree = 1;
+	git_work_tree_cfg = xstrndup(cwd, offset);
 	if (offset == len)
 		return NULL;
 
@@ -251,13 +312,13 @@ const char *setup_git_directory_gently(int *nongit_ok)
 	offset++;
 	cwd[len++] = '/';
 	cwd[len] = 0;
-	inside_git_dir = !prefixcmp(cwd + offset, ".git/");
 	return cwd + offset;
 }
 
 int git_config_perm(const char *var, const char *value)
 {
 	if (value) {
+		int i;
 		if (!strcmp(value, "umask"))
 			return PERM_UMASK;
 		if (!strcmp(value, "group"))
@@ -266,17 +327,30 @@ int git_config_perm(const char *var, const char *value)
 		    !strcmp(value, "world") ||
 		    !strcmp(value, "everybody"))
 			return PERM_EVERYBODY;
+		i = atoi(value);
+		if (i > 1)
+			return i;
 	}
 	return git_config_bool(var, value);
 }
 
 int check_repository_format_version(const char *var, const char *value)
 {
-       if (strcmp(var, "core.repositoryformatversion") == 0)
-               repository_format_version = git_config_int(var, value);
+	if (strcmp(var, "core.repositoryformatversion") == 0)
+		repository_format_version = git_config_int(var, value);
 	else if (strcmp(var, "core.sharedrepository") == 0)
 		shared_repository = git_config_perm(var, value);
-       return 0;
+	else if (strcmp(var, "core.bare") == 0) {
+		is_bare_repository_cfg = git_config_bool(var, value);
+		if (is_bare_repository_cfg == 1)
+			inside_work_tree = -1;
+	} else if (strcmp(var, "core.worktree") == 0) {
+		if (git_work_tree_cfg)
+			free(git_work_tree_cfg);
+		git_work_tree_cfg = xstrdup(value);
+		inside_work_tree = -1;
+	}
+	return 0;
 }
 
 int check_repository_format(void)
@@ -292,5 +366,16 @@ const char *setup_git_directory(void)
 {
 	const char *retval = setup_git_directory_gently(NULL);
 	check_repository_format();
+
+	/* If the work tree is not the default one, recompute prefix */
+	if (inside_work_tree < 0) {
+		static char buffer[PATH_MAX + 1];
+		char *rel;
+		if (retval && chdir(retval))
+			die ("Could not jump back into original cwd");
+		rel = get_relative_cwd(buffer, PATH_MAX, get_git_work_tree());
+		return rel && *rel ? strcat(rel, "/") : NULL;
+	}
+
 	return retval;
 }