diff options
Diffstat (limited to 'builtin-checkout-index.c')
| -rw-r--r-- | builtin-checkout-index.c | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/builtin-checkout-index.c b/builtin-checkout-index.c new file mode 100644 index 0000000000..75377b9cab --- /dev/null +++ b/builtin-checkout-index.c @@ -0,0 +1,306 @@ +/* + * 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 "strbuf.h" +#include "quote.h" +#include "cache-tree.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("", 0, name + prefix_length, + line_termination, stdout); + putchar(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 checkout_cache_usage[] = +"git-checkout-index [-u] [-q] [-a] [-f] [-n] [--stage=[123]|all] [--prefix=<string>] [--temp] [--] <file>..."; + +static struct lock_file lock_file; + +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; + + git_config(git_default_config); + state.base_dir = ""; + prefix_length = prefix ? strlen(prefix) : 0; + + if (read_cache() < 0) { + die("invalid cache"); + } + + for (i = 1; i < argc; i++) { + const char *arg = argv[i]; + + if (!strcmp(arg, "--")) { + i++; + break; + } + if (!strcmp(arg, "-a") || !strcmp(arg, "--all")) { + all = 1; + continue; + } + if (!strcmp(arg, "-f") || !strcmp(arg, "--force")) { + state.force = 1; + continue; + } + if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet")) { + state.quiet = 1; + continue; + } + if (!strcmp(arg, "-n") || !strcmp(arg, "--no-create")) { + state.not_new = 1; + continue; + } + if (!strcmp(arg, "-u") || !strcmp(arg, "--index")) { + state.refresh_cache = 1; + if (newfd < 0) + newfd = hold_locked_index(&lock_file, 1); + continue; + } + if (!strcmp(arg, "-z")) { + line_termination = 0; + continue; + } + if (!strcmp(arg, "--stdin")) { + if (i != argc - 1) + die("--stdin must be at the end"); + read_from_stdin = 1; + i++; /* do not consider arg as a file name */ + break; + } + if (!strcmp(arg, "--temp")) { + to_tempfile = 1; + continue; + } + if (!prefixcmp(arg, "--prefix=")) { + state.base_dir = arg+9; + state.base_dir_len = strlen(state.base_dir); + continue; + } + if (!prefixcmp(arg, "--stage=")) { + if (!strcmp(arg + 8, "all")) { + to_tempfile = 1; + checkout_stage = CHECKOUT_ALL; + } else { + int ch = arg[8]; + if ('1' <= ch && ch <= '3') + checkout_stage = arg[8] - '0'; + else + die("stage should be between 1 and 3 or all"); + } + continue; + } + if (arg[0] == '-') + usage(checkout_cache_usage); + break; + } + + if (state.base_dir_len || to_tempfile) { + /* when --prefix is specified we do not + * want to update cache. + */ + if (state.refresh_cache) { + close(newfd); newfd = -1; + rollback_lock_file(&lock_file); + } + state.refresh_cache = 0; + } + + /* Check out named files first */ + for ( ; 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; + if (all) + die("git-checkout-index: don't mix '--all' and '--stdin'"); + strbuf_init(&buf); + while (1) { + char *path_name; + const char *p; + + read_line(&buf, stdin, line_termination); + if (buf.eof) + break; + if (line_termination && buf.buf[0] == '"') + path_name = unquote_c_style(buf.buf, NULL); + else + path_name = buf.buf; + p = prefix_path(prefix, prefix_length, path_name); + checkout_file(p, prefix_length); + if (p < path_name || p > path_name + strlen(path_name)) + free((char *)p); + if (path_name != buf.buf) + free(path_name); + } + } + + if (all) + checkout_all(prefix, prefix_length); + + if (0 <= newfd && + (write_cache(newfd, active_cache, active_nr) || + close(newfd) || commit_locked_index(&lock_file))) + die("Unable to write new index file"); + return 0; +} |