33bd598c39
The function takes user input string and returns the object name (binary SHA-1) with mode bits and path when the object was looked up in a tree. Additionally give hints to help disambiguation of abbreviated object names when the caller knows what it is looking for. Signed-off-by: Junio C Hamano <gitster@pobox.com>
293 lines
6.4 KiB
C
293 lines
6.4 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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#include "diff.h"
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#include "userdiff.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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char *buf;
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unsigned long size;
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struct object_context obj_context;
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if (get_sha1_with_context(obj_name, 0, sha1, &obj_context))
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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] = { NULL };
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ls_args[0] = "ls-tree";
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ls_args[1] = obj_name;
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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 'c':
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if (!obj_context.path[0])
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die("git cat-file --textconv %s: <object> must be <sha1:path>",
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obj_name);
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if (!textconv_object(obj_context.path, obj_context.mode, sha1, &buf, &size))
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die("git cat-file --textconv: unable to run textconv on %s",
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obj_name);
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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", 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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if (print_contents == BATCH)
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free(contents);
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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 = STRBUF_INIT;
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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>|--textconv) <object>",
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"git cat-file (--batch|--batch-check) < <list_of_objects>",
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NULL
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};
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static int git_cat_file_config(const char *var, const char *value, void *cb)
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{
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switch (userdiff_config(var, value)) {
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case 0:
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break;
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case -1:
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return -1;
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default:
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return 0;
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}
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return git_default_config(var, value, cb);
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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, "textconv", &opt,
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"for blob objects, run textconv on object's content", 'c'),
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OPT_SET_INT(0, "batch", &batch,
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"show info and content of objects fed from the standard input",
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BATCH),
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OPT_SET_INT(0, "batch-check", &batch,
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"show info about objects fed from the standard input",
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BATCH_CHECK),
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OPT_END()
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};
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git_config(git_cat_file_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, prefix, 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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