X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=init-db.c;h=aabc09f4e1f714f5b4c1adba388fc47b41e16b0b;hb=794f9fe7db30e2aff8f8f0543c6d18bf579cdbc2;hp=65898fa582e973b1cb98171cd4494598dd8bc36d;hpb=7fa6b4e7692926d2d07adee1ef8e277157929058;p=git.git

diff --git a/init-db.c b/init-db.c
index 65898fa5..aabc09f4 100644
--- a/init-db.c
+++ b/init-db.c
@@ -5,52 +5,252 @@
  */
 #include "cache.h"
 
+#ifndef DEFAULT_GIT_TEMPLATE_DIR
+#define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates/"
+#endif
+
+static void safe_create_dir(const char *dir)
+{
+	if (mkdir(dir, 0777) < 0) {
+		if (errno != EEXIST) {
+			perror(dir);
+			exit(1);
+		}
+	}
+}
+
+static int copy_file(const char *dst, const char *src, int mode)
+{
+	int fdi, fdo;
+
+	mode = (mode & 0111) ? 0777 : 0666;
+	if ((fdi = open(src, O_RDONLY)) < 0)
+		return fdi;
+	if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) {
+		close(fdi);
+		return fdo;
+	}
+	while (1) {
+		char buf[BUFSIZ];
+		ssize_t leni, leno, ofs;
+		leni = read(fdi, buf, sizeof(buf));
+		if (leni < 0) {
+		error_return:
+			close(fdo);
+			close(fdi);
+			return -1;
+		}
+		if (!leni)
+			break;
+		ofs = 0;
+		do {
+			leno = write(fdo, buf+ofs, leni);
+			if (leno < 0)
+				goto error_return;
+			leni -= leno;
+			ofs += leno;
+		} while (0 < leni);
+	}
+	close(fdo);
+	close(fdi);
+	return 0;
+}
+
+static void copy_templates_1(char *path, int baselen,
+			     char *template, int template_baselen,
+			     DIR *dir)
+{
+	struct dirent *de;
+
+	/* Note: if ".git/hooks" file exists in the repository being
+	 * re-initialized, /etc/core-git/templates/hooks/update would
+	 * cause git-init-db to fail here.  I think this is sane but
+	 * it means that the set of templates we ship by default, along
+	 * with the way the namespace under .git/ is organized, should
+	 * be really carefully chosen.
+	 */
+	safe_create_dir(path);
+	while ((de = readdir(dir)) != NULL) {
+		struct stat st_git, st_template;
+		int namelen;
+		int exists = 0;
+
+		if (de->d_name[0] == '.')
+			continue;
+		namelen = strlen(de->d_name);
+		if ((PATH_MAX <= baselen + namelen) ||
+		    (PATH_MAX <= template_baselen + namelen))
+			die("insanely long template name %s", de->d_name);
+		memcpy(path + baselen, de->d_name, namelen+1);
+		memcpy(template + template_baselen, de->d_name, namelen+1);
+		if (lstat(path, &st_git)) {
+			if (errno != ENOENT)
+				die("cannot stat %s", path);
+		}
+		else
+			exists = 1;
+
+		if (lstat(template, &st_template))
+			die("cannot stat template %s", template);
+
+		if (S_ISDIR(st_template.st_mode)) {
+			DIR *subdir = opendir(template);
+			int baselen_sub = baselen + namelen;
+			int template_baselen_sub = template_baselen + namelen;
+			if (!subdir)
+				die("cannot opendir %s", template);
+			path[baselen_sub++] =
+				template[template_baselen_sub++] = '/';
+			path[baselen_sub] =
+				template[template_baselen_sub] = 0;
+			copy_templates_1(path, baselen_sub,
+					 template, template_baselen_sub,
+					 subdir);
+			closedir(subdir);
+		}
+		else if (exists)
+			continue;
+		else if (S_ISLNK(st_template.st_mode)) {
+			char lnk[256];
+			int len;
+			len = readlink(template, lnk, sizeof(lnk));
+			if (len < 0)
+				die("cannot readlink %s", template);
+			if (sizeof(lnk) <= len)
+				die("insanely long symlink %s", template);
+			lnk[len] = 0;
+			if (symlink(lnk, path))
+				die("cannot symlink %s %s", lnk, path);
+		}
+		else if (S_ISREG(st_template.st_mode)) {
+			if (copy_file(path, template, st_template.st_mode))
+				die("cannot copy %s to %s", template, path);
+		}
+		else
+			error("ignoring template %s", template);
+	}
+}
+
+static void copy_templates(const char *git_dir, int len, char *template_dir)
+{
+	char path[PATH_MAX];
+	char template_path[PATH_MAX];
+	int template_len;
+	DIR *dir;
+
+	if (!template_dir)
+		template_dir = DEFAULT_GIT_TEMPLATE_DIR;
+	strcpy(template_path, template_dir);
+	template_len = strlen(template_path);
+	if (template_path[template_len-1] != '/') {
+		template_path[template_len++] = '/';
+		template_path[template_len] = 0;
+	}
+	dir = opendir(template_path);
+	if (!dir) {
+		fprintf(stderr, "warning: templates not found %s\n",
+			template_dir);
+		return;
+	}
+
+	memcpy(path, git_dir, len);
+	path[len] = 0;
+	copy_templates_1(path, len,
+			 template_path, template_len,
+			 dir);
+	closedir(dir);
+}
+
+static void create_default_files(const char *git_dir,
+				 char *template_path)
+{
+	unsigned len = strlen(git_dir);
+	static char path[PATH_MAX];
+	unsigned char sha1[20];
+
+	if (len > sizeof(path)-50)
+		die("insane git directory %s", git_dir);
+	memcpy(path, git_dir, len);
+
+	if (len && path[len-1] != '/')
+		path[len++] = '/';
+
+	/*
+	 * Create .git/refs/{heads,tags}
+	 */
+	strcpy(path + len, "refs");
+	safe_create_dir(path);
+	strcpy(path + len, "refs/heads");
+	safe_create_dir(path);
+	strcpy(path + len, "refs/tags");
+	safe_create_dir(path);
+
+	/*
+	 * Create the default symlink from ".git/HEAD" to the "master"
+	 * branch, if it does not exist yet.
+	 */
+	strcpy(path + len, "HEAD");
+	if (read_ref(path, sha1) < 0) {
+		if (create_symref(path, "refs/heads/master") < 0)
+			exit(1);
+	}
+	path[len] = 0;
+	copy_templates(path, len, template_path);
+}
+
+static const char init_db_usage[] =
+"git-init-db [--template=<template-directory>]";
+
+/*
+ * If you want to, you can share the DB area with any number of branches.
+ * That has advantages: you can save space by sharing all the SHA1 objects.
+ * On the other hand, it might just make lookup slower and messier. You
+ * be the judge.  The default case is to have one DB per managed directory.
+ */
 int main(int argc, char **argv)
 {
-	char *sha1_dir = getenv(DB_ENVIRONMENT), *path;
+	const char *git_dir;
+	const char *sha1_dir;
+	char *path, *template_dir = NULL;
 	int len, i;
 
-	if (mkdir(".git", 0755) < 0) {
-		perror("unable to create .git directory");
-		exit(1);
+	for (i = 1; i < argc; i++, argv++) {
+		char *arg = argv[1];
+		if (arg[0] != '-')
+			break;
+		else if (!strncmp(arg, "--template=", 11))
+			template_dir = arg+11;
+		else
+			die(init_db_usage);
 	}
 
 	/*
-	 * If you want to, you can share the DB area with any number of branches.
-	 * That has advantages: you can save space by sharing all the SHA1 objects.
-	 * On the other hand, it might just make lookup slower and messier. You
-	 * be the judge.
+	 * Set up the default .git directory contents
 	 */
-	sha1_dir = getenv(DB_ENVIRONMENT);
-	if (sha1_dir) {
-		struct stat st;
-		if (!stat(sha1_dir, &st) && S_ISDIR(st.st_mode))
-			return 0;
-		fprintf(stderr, "DB_ENVIRONMENT set to bad directory %s: ", sha1_dir);
+	git_dir = getenv(GIT_DIR_ENVIRONMENT);
+	if (!git_dir) {
+		git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
+		fprintf(stderr, "defaulting to local storage area\n");
 	}
+	safe_create_dir(git_dir);
+	create_default_files(git_dir, template_dir);
 
 	/*
-	 * The default case is to have a DB per managed directory.
+	 * And set up the object store.
 	 */
-	sha1_dir = DEFAULT_DB_ENVIRONMENT;
-	fprintf(stderr, "defaulting to private storage area\n");
+	sha1_dir = get_object_directory();
 	len = strlen(sha1_dir);
-	if (mkdir(sha1_dir, 0755) < 0) {
-		if (errno != EEXIST) {
-			perror(sha1_dir);
-			exit(1);
-		}
-	}
-	path = malloc(len + 40);
+	path = xmalloc(len + 40);
 	memcpy(path, sha1_dir, len);
+
+	safe_create_dir(sha1_dir);
 	for (i = 0; i < 256; i++) {
 		sprintf(path+len, "/%02x", i);
-		if (mkdir(path, 0755) < 0) {
-			if (errno != EEXIST) {
-				perror(path);
-				exit(1);
-			}
-		}
+		safe_create_dir(path);
 	}
+	strcpy(path+len, "/pack");
+	safe_create_dir(path);
+	strcpy(path+len, "/info");
+	safe_create_dir(path);
 	return 0;
 }