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![Stephan Beyer](/assets/img/avatar_default.png)
When you misuse a git command, you are shown the usage string. But this is currently shown in the dashed form. So if you just copy what you see, it will not work, when the dashed form is no longer supported. This patch makes git commands show the dash-less version. For shell scripts that do not specify OPTIONS_SPEC, git-sh-setup.sh generates a dash-less usage string now. Signed-off-by: Stephan Beyer <s-beyer@gmx.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
259 lines
5.6 KiB
C
259 lines
5.6 KiB
C
/*
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* GIT - The information manager from hell
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*
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include "cache.h"
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#include "exec_cmd.h"
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#include "tag.h"
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#include "tree.h"
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#include "builtin.h"
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#include "parse-options.h"
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#define BATCH 1
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#define BATCH_CHECK 2
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static void pprint_tag(const unsigned char *sha1, const char *buf, unsigned long size)
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{
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/* the parser in tag.c is useless here. */
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const char *endp = buf + size;
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const char *cp = buf;
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while (cp < endp) {
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char c = *cp++;
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if (c != '\n')
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continue;
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if (7 <= endp - cp && !memcmp("tagger ", cp, 7)) {
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const char *tagger = cp;
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/* Found the tagger line. Copy out the contents
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* of the buffer so far.
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*/
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write_or_die(1, buf, cp - buf);
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/*
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* Do something intelligent, like pretty-printing
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* the date.
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*/
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while (cp < endp) {
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if (*cp++ == '\n') {
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/* tagger to cp is a line
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* that has ident and time.
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*/
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const char *sp = tagger;
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char *ep;
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unsigned long date;
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long tz;
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while (sp < cp && *sp != '>')
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sp++;
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if (sp == cp) {
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/* give up */
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write_or_die(1, tagger,
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cp - tagger);
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break;
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}
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while (sp < cp &&
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!('0' <= *sp && *sp <= '9'))
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sp++;
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write_or_die(1, tagger, sp - tagger);
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date = strtoul(sp, &ep, 10);
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tz = strtol(ep, NULL, 10);
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sp = show_date(date, tz, 0);
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write_or_die(1, sp, strlen(sp));
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xwrite(1, "\n", 1);
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break;
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}
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}
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break;
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}
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if (cp < endp && *cp == '\n')
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/* end of header */
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break;
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}
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/* At this point, we have copied out the header up to the end of
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* the tagger line and cp points at one past \n. It could be the
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* next header line after the tagger line, or it could be another
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* \n that marks the end of the headers. We need to copy out the
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* remainder as is.
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*/
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if (cp < endp)
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write_or_die(1, cp, endp - cp);
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}
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static int cat_one_file(int opt, const char *exp_type, const char *obj_name)
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{
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unsigned char sha1[20];
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enum object_type type;
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void *buf;
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unsigned long size;
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if (get_sha1(obj_name, sha1))
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die("Not a valid object name %s", obj_name);
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buf = NULL;
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switch (opt) {
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case 't':
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type = sha1_object_info(sha1, NULL);
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if (type > 0) {
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printf("%s\n", typename(type));
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return 0;
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}
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break;
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case 's':
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type = sha1_object_info(sha1, &size);
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if (type > 0) {
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printf("%lu\n", size);
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return 0;
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}
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break;
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case 'e':
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return !has_sha1_file(sha1);
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case 'p':
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type = sha1_object_info(sha1, NULL);
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if (type < 0)
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die("Not a valid object name %s", obj_name);
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/* custom pretty-print here */
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if (type == OBJ_TREE) {
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const char *ls_args[3] = {"ls-tree", obj_name, NULL};
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return cmd_ls_tree(2, ls_args, NULL);
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}
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buf = read_sha1_file(sha1, &type, &size);
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if (!buf)
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die("Cannot read object %s", obj_name);
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if (type == OBJ_TAG) {
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pprint_tag(sha1, buf, size);
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return 0;
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}
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/* otherwise just spit out the data */
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break;
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case 0:
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buf = read_object_with_reference(sha1, exp_type, &size, NULL);
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break;
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default:
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die("git-cat-file: unknown option: %s\n", exp_type);
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}
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if (!buf)
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die("git-cat-file %s: bad file", obj_name);
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write_or_die(1, buf, size);
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return 0;
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}
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static int batch_one_object(const char *obj_name, int print_contents)
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{
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unsigned char sha1[20];
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enum object_type type = 0;
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unsigned long size;
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void *contents = contents;
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if (!obj_name)
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return 1;
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if (get_sha1(obj_name, sha1)) {
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printf("%s missing\n", obj_name);
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fflush(stdout);
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return 0;
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}
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if (print_contents == BATCH)
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contents = read_sha1_file(sha1, &type, &size);
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else
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type = sha1_object_info(sha1, &size);
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if (type <= 0) {
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printf("%s missing\n", obj_name);
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fflush(stdout);
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return 0;
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}
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printf("%s %s %lu\n", sha1_to_hex(sha1), typename(type), size);
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fflush(stdout);
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if (print_contents == BATCH) {
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write_or_die(1, contents, size);
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printf("\n");
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fflush(stdout);
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free(contents);
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}
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return 0;
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}
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static int batch_objects(int print_contents)
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{
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struct strbuf buf;
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strbuf_init(&buf, 0);
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while (strbuf_getline(&buf, stdin, '\n') != EOF) {
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int error = batch_one_object(buf.buf, print_contents);
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if (error)
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return error;
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}
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return 0;
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}
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static const char * const cat_file_usage[] = {
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"git cat-file [-t|-s|-e|-p|<type>] <sha1>",
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"git cat-file [--batch|--batch-check] < <list_of_sha1s>",
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NULL
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};
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int cmd_cat_file(int argc, const char **argv, const char *prefix)
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{
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int opt = 0, batch = 0;
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const char *exp_type = NULL, *obj_name = NULL;
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const struct option options[] = {
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OPT_GROUP("<type> can be one of: blob, tree, commit, tag"),
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OPT_SET_INT('t', NULL, &opt, "show object type", 't'),
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OPT_SET_INT('s', NULL, &opt, "show object size", 's'),
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OPT_SET_INT('e', NULL, &opt,
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"exit with zero when there's no error", 'e'),
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OPT_SET_INT('p', NULL, &opt, "pretty-print object's content", 'p'),
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OPT_SET_INT(0, "batch", &batch,
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"show info and content of objects feeded on stdin", BATCH),
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OPT_SET_INT(0, "batch-check", &batch,
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"show info about objects feeded on stdin",
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BATCH_CHECK),
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OPT_END()
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};
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git_config(git_default_config, NULL);
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if (argc != 3 && argc != 2)
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usage_with_options(cat_file_usage, options);
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argc = parse_options(argc, argv, options, cat_file_usage, 0);
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if (opt) {
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if (argc == 1)
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obj_name = argv[0];
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else
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usage_with_options(cat_file_usage, options);
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}
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if (!opt && !batch) {
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if (argc == 2) {
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exp_type = argv[0];
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obj_name = argv[1];
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} else
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usage_with_options(cat_file_usage, options);
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}
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if (batch && (opt || argc)) {
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usage_with_options(cat_file_usage, options);
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}
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if (batch)
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return batch_objects(batch);
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return cat_one_file(opt, exp_type, obj_name);
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}
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