1 files changed, 286 insertions, 0 deletions
diff --git a/environment.c b/environment.c
new file mode 100644
index 0000000000..5c4815dbe1
--- /dev/null
+++ b/environment.c
@@ -0,0 +1,286 @@
+/*
+ * We put all the git config variables in this same object
+ * file, so that programs can link against the config parser
+ * without having to link against all the rest of git.
+ *
+ * In particular, no need to bring in libz etc unless needed,
+ * even if you might want to know where the git directory etc
+ * are.
+ */
+#include "cache.h"
+#include "refs.h"
+#include "fmt-merge-msg.h"
+#include "commit.h"
+
+int trust_executable_bit = 1;
+int trust_ctime = 1;
+int check_stat = 1;
+int has_symlinks = 1;
+int minimum_abbrev = 4, default_abbrev = 7;
+int ignore_case;
+int assume_unchanged;
+int prefer_symlink_refs;
+int is_bare_repository_cfg = -1; /* unspecified */
+int log_all_ref_updates = -1; /* unspecified */
+int warn_ambiguous_refs = 1;
+int warn_on_object_refname_ambiguity = 1;
+int repository_format_version;
+const char *git_commit_encoding;
+const char *git_log_output_encoding;
+int shared_repository = PERM_UMASK;
+const char *apply_default_whitespace;
+const char *apply_default_ignorewhitespace;
+const char *git_attributes_file;
+int zlib_compression_level = Z_BEST_SPEED;
+int core_compression_level;
+int core_compression_seen;
+int fsync_object_files;
+size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
+size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
+size_t delta_base_cache_limit = 16 * 1024 * 1024;
+unsigned long big_file_threshold = 512 * 1024 * 1024;
+const char *pager_program;
+int pager_use_color = 1;
+const char *editor_program;
+const char *askpass_program;
+const char *excludes_file;
+enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
+int check_replace_refs = 1;
+enum eol core_eol = EOL_UNSET;
+enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
+unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
+enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
+enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
+enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
+#ifndef OBJECT_CREATION_MODE
+#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
+#endif
+enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
+char *notes_ref_name;
+int grafts_replace_parents = 1;
+int core_apply_sparse_checkout;
+int merge_log_config = -1;
+int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
+struct startup_info *startup_info;
+unsigned long pack_size_limit_cfg;
+
+/*
+ * The character that begins a commented line in user-editable file
+ * that is subject to stripspace.
+ */
+char comment_line_char = '#';
+
+/* Parallel index stat data preload? */
+int core_preload_index = 0;
+
+/* This is set by setup_git_dir_gently() and/or git_default_config() */
+char *git_work_tree_cfg;
+static char *work_tree;
+
+static const char *namespace;
+static size_t namespace_len;
+
+static const char *git_dir;
+static char *git_object_dir, *git_index_file, *git_graft_file;
+
+/*
+ * Repository-local GIT_* environment variables; see cache.h for details.
+ */
+const char * const local_repo_env[] = {
+	ALTERNATE_DB_ENVIRONMENT,
+	CONFIG_ENVIRONMENT,
+	CONFIG_DATA_ENVIRONMENT,
+	DB_ENVIRONMENT,
+	GIT_DIR_ENVIRONMENT,
+	GIT_WORK_TREE_ENVIRONMENT,
+	GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
+	GRAFT_ENVIRONMENT,
+	INDEX_ENVIRONMENT,
+	NO_REPLACE_OBJECTS_ENVIRONMENT,
+	GIT_PREFIX_ENVIRONMENT,
+	GIT_SHALLOW_FILE_ENVIRONMENT,
+	NULL
+};
+
+static char *expand_namespace(const char *raw_namespace)
+{
+	struct strbuf buf = STRBUF_INIT;
+	struct strbuf **components, **c;
+
+	if (!raw_namespace || !*raw_namespace)
+		return xstrdup("");
+
+	strbuf_addstr(&buf, raw_namespace);
+	components = strbuf_split(&buf, '/');
+	strbuf_reset(&buf);
+	for (c = components; *c; c++)
+		if (strcmp((*c)->buf, "/") != 0)
+			strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
+	strbuf_list_free(components);
+	if (check_refname_format(buf.buf, 0))
+		die("bad git namespace path \"%s\"", raw_namespace);
+	strbuf_addch(&buf, '/');
+	return strbuf_detach(&buf, NULL);
+}
+
+static void setup_git_env(void)
+{
+	const char *gitfile;
+	const char *shallow_file;
+
+	git_dir = getenv(GIT_DIR_ENVIRONMENT);
+	if (!git_dir)
+		git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
+	gitfile = read_gitfile(git_dir);
+	git_dir = xstrdup(gitfile ? gitfile : git_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);
+	}
+	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);
+	}
+	git_graft_file = getenv(GRAFT_ENVIRONMENT);
+	if (!git_graft_file)
+		git_graft_file = git_pathdup("info/grafts");
+	if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
+		check_replace_refs = 0;
+	namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
+	namespace_len = strlen(namespace);
+	shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
+	if (shallow_file)
+		set_alternate_shallow_file(shallow_file, 0);
+}
+
+int is_bare_repository(void)
+{
+	/* if core.bare is not 'false', let's see if there is a work tree */
+	return is_bare_repository_cfg && !get_git_work_tree();
+}
+
+const char *get_git_dir(void)
+{
+	if (!git_dir)
+		setup_git_env();
+	return git_dir;
+}
+
+const char *get_git_namespace(void)
+{
+	if (!namespace)
+		setup_git_env();
+	return namespace;
+}
+
+const char *strip_namespace(const char *namespaced_ref)
+{
+	if (!starts_with(namespaced_ref, get_git_namespace()))
+		return NULL;
+	return namespaced_ref + namespace_len;
+}
+
+static int git_work_tree_initialized;
+
+/*
+ * Note.  This works only before you used a work tree.  This was added
+ * primarily to support git-clone to work in a new repository it just
+ * created, and is not meant to flip between different work trees.
+ */
+void set_git_work_tree(const char *new_work_tree)
+{
+	if (git_work_tree_initialized) {
+		new_work_tree = real_path(new_work_tree);
+		if (strcmp(new_work_tree, work_tree))
+			die("internal error: work tree has already been set\n"
+			    "Current worktree: %s\nNew worktree: %s",
+			    work_tree, new_work_tree);
+		return;
+	}
+	git_work_tree_initialized = 1;
+	work_tree = xstrdup(real_path(new_work_tree));
+}
+
+const char *get_git_work_tree(void)
+{
+	return work_tree;
+}
+
+char *get_object_directory(void)
+{
+	if (!git_object_dir)
+		setup_git_env();
+	return git_object_dir;
+}
+
+int odb_mkstemp(char *template, size_t limit, const char *pattern)
+{
+	int fd;
+	/*
+	 * we let the umask do its job, don't try to be more
+	 * restrictive except to remove write permission.
+	 */
+	int mode = 0444;
+	snprintf(template, limit, "%s/%s",
+		 get_object_directory(), pattern);
+	fd = git_mkstemp_mode(template, mode);
+	if (0 <= fd)
+		return fd;
+
+	/* slow path */
+	/* some mkstemp implementations erase template on failure */
+	snprintf(template, limit, "%s/%s",
+		 get_object_directory(), pattern);
+	safe_create_leading_directories(template);
+	return xmkstemp_mode(template, mode);
+}
+
+int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
+{
+	int fd;
+
+	snprintf(name, namesz, "%s/pack/pack-%s.keep",
+		 get_object_directory(), sha1_to_hex(sha1));
+	fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
+	if (0 <= fd)
+		return fd;
+
+	/* slow path */
+	safe_create_leading_directories(name);
+	return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
+}
+
+char *get_index_file(void)
+{
+	if (!git_index_file)
+		setup_git_env();
+	return git_index_file;
+}
+
+char *get_graft_file(void)
+{
+	if (!git_graft_file)
+		setup_git_env();
+	return git_graft_file;
+}
+
+int set_git_dir(const char *path)
+{
+	if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
+		return error("Could not set GIT_DIR to '%s'", path);
+	setup_git_env();
+	return 0;
+}
+
+const char *get_log_output_encoding(void)
+{
+	return git_log_output_encoding ? git_log_output_encoding
+		: get_commit_output_encoding();
+}
+
+const char *get_commit_output_encoding(void)
+{
+	return git_commit_encoding ? git_commit_encoding : "UTF-8";
+}