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-rw-r--r--builtin-checkout-index.c315
1 files changed, 315 insertions, 0 deletions
diff --git a/builtin-checkout-index.c b/builtin-checkout-index.c
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+/*
+ * Check-out files from the "current cache directory"
+ *
+ * Copyright (C) 2005 Linus Torvalds
+ *
+ * Careful: order of argument flags does matter. For example,
+ *
+ * git checkout-index -a -f file.c
+ *
+ * Will first check out all files listed in the cache (but not
+ * overwrite any old ones), and then force-checkout "file.c" a
+ * second time (ie that one _will_ overwrite any old contents
+ * with the same filename).
+ *
+ * Also, just doing "git checkout-index" does nothing. You probably
+ * meant "git checkout-index -a". And if you want to force it, you
+ * want "git checkout-index -f -a".
+ *
+ * Intuitiveness is not the goal here. Repeatability is. The
+ * reason for the "no arguments means no work" thing is that
+ * from scripts you are supposed to be able to do things like
+ *
+ * find . -name '*.h' -print0 | xargs -0 git checkout-index -f --
+ *
+ * or:
+ *
+ * find . -name '*.h' -print0 | git checkout-index -f -z --stdin
+ *
+ * which will force all existing *.h files to be replaced with
+ * their cached copies. If an empty command line implied "all",
+ * then this would force-refresh everything in the cache, which
+ * was not the point.
+ *
+ * Oh, and the "--" is just a good idea when you know the rest
+ * will be filenames. Just so that you wouldn't have a filename
+ * of "-a" causing problems (not possible in the above example,
+ * but get used to it in scripting!).
+ */
+#include "builtin.h"
+#include "cache.h"
+#include "quote.h"
+#include "cache-tree.h"
+#include "parse-options.h"
+
+#define CHECKOUT_ALL 4
+static int line_termination = '\n';
+static int checkout_stage; /* default to checkout stage0 */
+static int to_tempfile;
+static char topath[4][PATH_MAX + 1];
+
+static struct checkout state;
+
+static void write_tempfile_record(const char *name, int prefix_length)
+{
+ int i;
+
+ if (CHECKOUT_ALL == checkout_stage) {
+ for (i = 1; i < 4; i++) {
+ if (i > 1)
+ putchar(' ');
+ if (topath[i][0])
+ fputs(topath[i], stdout);
+ else
+ putchar('.');
+ }
+ } else
+ fputs(topath[checkout_stage], stdout);
+
+ putchar('\t');
+ write_name_quoted(name + prefix_length, stdout, line_termination);
+
+ for (i = 0; i < 4; i++) {
+ topath[i][0] = 0;
+ }
+}
+
+static int checkout_file(const char *name, int prefix_length)
+{
+ int namelen = strlen(name);
+ int pos = cache_name_pos(name, namelen);
+ int has_same_name = 0;
+ int did_checkout = 0;
+ int errs = 0;
+
+ if (pos < 0)
+ pos = -pos - 1;
+
+ while (pos < active_nr) {
+ struct cache_entry *ce = active_cache[pos];
+ if (ce_namelen(ce) != namelen ||
+ memcmp(ce->name, name, namelen))
+ break;
+ has_same_name = 1;
+ pos++;
+ if (ce_stage(ce) != checkout_stage
+ && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
+ continue;
+ did_checkout = 1;
+ if (checkout_entry(ce, &state,
+ to_tempfile ? topath[ce_stage(ce)] : NULL) < 0)
+ errs++;
+ }
+
+ if (did_checkout) {
+ if (to_tempfile)
+ write_tempfile_record(name, prefix_length);
+ return errs > 0 ? -1 : 0;
+ }
+
+ if (!state.quiet) {
+ fprintf(stderr, "git checkout-index: %s ", name);
+ if (!has_same_name)
+ fprintf(stderr, "is not in the cache");
+ else if (checkout_stage)
+ fprintf(stderr, "does not exist at stage %d",
+ checkout_stage);
+ else
+ fprintf(stderr, "is unmerged");
+ fputc('\n', stderr);
+ }
+ return -1;
+}
+
+static void checkout_all(const char *prefix, int prefix_length)
+{
+ int i, errs = 0;
+ struct cache_entry* last_ce = NULL;
+
+ for (i = 0; i < active_nr ; i++) {
+ struct cache_entry *ce = active_cache[i];
+ if (ce_stage(ce) != checkout_stage
+ && (CHECKOUT_ALL != checkout_stage || !ce_stage(ce)))
+ continue;
+ if (prefix && *prefix &&
+ (ce_namelen(ce) <= prefix_length ||
+ memcmp(prefix, ce->name, prefix_length)))
+ continue;
+ if (last_ce && to_tempfile) {
+ if (ce_namelen(last_ce) != ce_namelen(ce)
+ || memcmp(last_ce->name, ce->name, ce_namelen(ce)))
+ write_tempfile_record(last_ce->name, prefix_length);
+ }
+ if (checkout_entry(ce, &state,
+ to_tempfile ? topath[ce_stage(ce)] : NULL) < 0)
+ errs++;
+ last_ce = ce;
+ }
+ if (last_ce && to_tempfile)
+ write_tempfile_record(last_ce->name, prefix_length);
+ if (errs)
+ /* we have already done our error reporting.
+ * exit with the same code as die().
+ */
+ exit(128);
+}
+
+static const char * const builtin_checkout_index_usage[] = {
+ "git checkout-index [options] [--] <file>...",
+ NULL
+};
+
+static struct lock_file lock_file;
+
+static int option_parse_u(const struct option *opt,
+ const char *arg, int unset)
+{
+ int *newfd = opt->value;
+
+ state.refresh_cache = 1;
+ if (*newfd < 0)
+ *newfd = hold_locked_index(&lock_file, 1);
+ return 0;
+}
+
+static int option_parse_z(const struct option *opt,
+ const char *arg, int unset)
+{
+ if (unset)
+ line_termination = '\n';
+ else
+ line_termination = 0;
+ return 0;
+}
+
+static int option_parse_prefix(const struct option *opt,
+ const char *arg, int unset)
+{
+ state.base_dir = arg;
+ state.base_dir_len = strlen(arg);
+ return 0;
+}
+
+static int option_parse_stage(const struct option *opt,
+ const char *arg, int unset)
+{
+ if (!strcmp(arg, "all")) {
+ to_tempfile = 1;
+ checkout_stage = CHECKOUT_ALL;
+ } else {
+ int ch = arg[0];
+ if ('1' <= ch && ch <= '3')
+ checkout_stage = arg[0] - '0';
+ else
+ die("stage should be between 1 and 3 or all");
+ }
+ return 0;
+}
+
+int cmd_checkout_index(int argc, const char **argv, const char *prefix)
+{
+ int i;
+ int newfd = -1;
+ int all = 0;
+ int read_from_stdin = 0;
+ int prefix_length;
+ int force = 0, quiet = 0, not_new = 0;
+ struct option builtin_checkout_index_options[] = {
+ OPT_BOOLEAN('a', "all", &all,
+ "checks out all files in the index"),
+ OPT_BOOLEAN('f', "force", &force,
+ "forces overwrite of existing files"),
+ OPT__QUIET(&quiet),
+ OPT_BOOLEAN('n', "no-create", &not_new,
+ "don't checkout new files"),
+ { OPTION_CALLBACK, 'u', "index", &newfd, NULL,
+ "update stat information in the index file",
+ PARSE_OPT_NOARG, option_parse_u },
+ { OPTION_CALLBACK, 'z', NULL, NULL, NULL,
+ "paths are separated with NUL character",
+ PARSE_OPT_NOARG, option_parse_z },
+ OPT_BOOLEAN(0, "stdin", &read_from_stdin,
+ "read list of paths from the standard input"),
+ OPT_BOOLEAN(0, "temp", &to_tempfile,
+ "write the content to temporary files"),
+ OPT_CALLBACK(0, "prefix", NULL, "string",
+ "when creating files, prepend <string>",
+ option_parse_prefix),
+ OPT_CALLBACK(0, "stage", NULL, NULL,
+ "copy out the files from named stage",
+ option_parse_stage),
+ OPT_END()
+ };
+
+ git_config(git_default_config, NULL);
+ state.base_dir = "";
+ prefix_length = prefix ? strlen(prefix) : 0;
+
+ if (read_cache() < 0) {
+ die("invalid cache");
+ }
+
+ argc = parse_options(argc, argv, builtin_checkout_index_options,
+ builtin_checkout_index_usage, 0);
+ state.force = force;
+ state.quiet = quiet;
+ state.not_new = not_new;
+
+ if (state.base_dir_len || to_tempfile) {
+ /* when --prefix is specified we do not
+ * want to update cache.
+ */
+ if (state.refresh_cache) {
+ rollback_lock_file(&lock_file);
+ newfd = -1;
+ }
+ state.refresh_cache = 0;
+ }
+
+ /* Check out named files first */
+ for (i = 0; i < argc; i++) {
+ const char *arg = argv[i];
+ const char *p;
+
+ if (all)
+ die("git checkout-index: don't mix '--all' and explicit filenames");
+ if (read_from_stdin)
+ die("git checkout-index: don't mix '--stdin' and explicit filenames");
+ p = prefix_path(prefix, prefix_length, arg);
+ checkout_file(p, prefix_length);
+ if (p < arg || p > arg + strlen(arg))
+ free((char*)p);
+ }
+
+ if (read_from_stdin) {
+ struct strbuf buf = STRBUF_INIT, nbuf = STRBUF_INIT;
+
+ if (all)
+ die("git checkout-index: don't mix '--all' and '--stdin'");
+
+ while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
+ const char *p;
+ if (line_termination && buf.buf[0] == '"') {
+ strbuf_reset(&nbuf);
+ if (unquote_c_style(&nbuf, buf.buf, NULL))
+ die("line is badly quoted");
+ strbuf_swap(&buf, &nbuf);
+ }
+ p = prefix_path(prefix, prefix_length, buf.buf);
+ checkout_file(p, prefix_length);
+ if (p < buf.buf || p > buf.buf + buf.len)
+ free((char *)p);
+ }
+ strbuf_release(&nbuf);
+ strbuf_release(&buf);
+ }
+
+ if (all)
+ checkout_all(prefix, prefix_length);
+
+ if (0 <= newfd &&
+ (write_cache(newfd, active_cache, active_nr) ||
+ commit_locked_index(&lock_file)))
+ die("Unable to write new index file");
+ return 0;
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-28 04:28:01 +0000