X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=setup.c;h=258da176150081749a2ca2faeebc316911f0fba1;hb=89bc8c785e20258efba3b2b5ffc26098fa0b8bc8;hp=453bddbb17365c8b090757c544edcc0a61fc96fb;hpb=d288a70030eaa5c205a72b4548635e17f8e523c0;p=git.git

diff --git a/setup.c b/setup.c
index 453bddbb..258da176 100644
--- a/setup.c
+++ b/setup.c
@@ -1,23 +1,60 @@
 #include "cache.h"
 
+char *prefix_path(const char *prefix, int len, char *path)
+{
+	char *orig = path;
+	for (;;) {
+		char c;
+		if (*path != '.')
+			break;
+		c = path[1];
+		/* "." */
+		if (!c) {
+			path++;
+			break;
+		}
+		/* "./" */
+		if (c == '/') {
+			path += 2;
+			continue;
+		}
+		if (c != '.')
+			break;
+		c = path[2];
+		if (!c)
+			path += 2;
+		else if (c == '/')
+			path += 3;
+		else
+			break;
+		/* ".." and "../" */
+		/* Remove last component of the prefix */
+		do {
+			if (!len)
+				die("'%s' is outside repository", orig);
+			len--;
+		} while (len && prefix[len-1] != '/');
+		continue;
+	}
+	if (len) {
+		int speclen = strlen(path);
+		char *n = xmalloc(speclen + len + 1);
+	
+		memcpy(n, prefix, len);
+		memcpy(n + len, path, speclen+1);
+		path = n;
+	}
+	return path;
+}
+
 const char **get_pathspec(const char *prefix, char **pathspec)
 {
 	char *entry = *pathspec;
 	char **p;
 	int prefixlen;
 
-	if (!prefix) {
-		char **p;
-		if (!entry)
-			return NULL;
-		p = pathspec;
-		do {
-			if (*entry != '.')
-				continue;
-			/* fixup ? */
-		} while ((entry = *++p) != NULL);
-		return (const char **) pathspec;
-	}
+	if (!prefix && !entry)
+		return NULL;
 
 	if (!entry) {
 		static const char *spec[2];
@@ -27,42 +64,32 @@ const char **get_pathspec(const char *prefix, char **pathspec)
 	}
 
 	/* Otherwise we have to re-write the entries.. */
-	prefixlen = strlen(prefix);
 	p = pathspec;
+	prefixlen = prefix ? strlen(prefix) : 0;
 	do {
-		int speclen, len = prefixlen;
-		char *n;
-
-		for (;;) {
-			if (!strcmp(entry, ".")) {
-				entry++;
-				break;
-			}
-			if (!strncmp(entry, "./", 2)) {
-				entry += 2;
-				continue;
-			}
-			if (!strncmp(entry, "../", 3)) {
-				do {
-					if (!len)
-						die("'%s' is outside repository", *p);
-					len--;
-				} while (len && prefix[len-1] != '/');
-				entry += 3;
-				continue;
-			}
-			break;
-		}
-		speclen = strlen(entry);
-		n = xmalloc(speclen + len + 1);
-		
-		memcpy(n, prefix, len);
-		memcpy(n + len, entry, speclen+1);
-		*p = n;
+		*p = prefix_path(prefix, prefixlen, entry);
 	} while ((entry = *++p) != NULL);
 	return (const char **) pathspec;
 }
 
+/*
+ * Test it it looks like we're at the top
+ * level git directory. We want to see a
+ *
+ *  - a HEAD symlink and a refs/ directory under ".git"
+ *  - either a .git/objects/ directory _or_ the proper
+ *    GIT_OBJECT_DIRECTORY environment variable
+ */
+static int is_toplevel_directory(void)
+{
+	struct stat st;
+
+	return	!lstat(".git/HEAD", &st) &&
+		S_ISLNK(st.st_mode) &&
+		!access(".git/refs/", X_OK) &&
+		(gitenv(DB_ENVIRONMENT) || !access(".git/objects/", X_OK));
+}
+
 const char *setup_git_directory(void)
 {
 	static char cwd[PATH_MAX+1];
@@ -80,18 +107,8 @@ const char *setup_git_directory(void)
 
 	offset = len = strlen(cwd);
 	for (;;) {
-		/*
-		 * We always want to see a .git/HEAD and a .git/refs/
-		 * subdirectory
-		 */
-		if (!access(".git/HEAD", R_OK) && !access(".git/refs/", X_OK)) {
-			/*
-			 * Then we need either a GIT_OBJECT_DIRECTORY define
-			 * or a .git/objects/ directory
-			 */
-			if (gitenv(DB_ENVIRONMENT) || !access(".git/objects/", X_OK))
-				break;
-		}
+		if (is_toplevel_directory())
+			break;
 		chdir("..");
 		do {
 			if (!offset)