diff options
Diffstat (limited to 'builtin-cat-file.c')
| -rw-r--r-- | builtin-cat-file.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/builtin-cat-file.c b/builtin-cat-file.c new file mode 100644 index 0000000..f132d58 --- /dev/null +++ b/builtin-cat-file.c @@ -0,0 +1,159 @@ +/* + * GIT - The information manager from hell + * + * Copyright (C) Linus Torvalds, 2005 + */ +#include "cache.h" +#include "exec_cmd.h" +#include "tag.h" +#include "tree.h" +#include "builtin.h" + +static void pprint_tag(const unsigned char *sha1, const char *buf, unsigned long size) +{ + /* the parser in tag.c is useless here. */ + const char *endp = buf + size; + const char *cp = buf; + + while (cp < endp) { + char c = *cp++; + if (c != '\n') + continue; + if (7 <= endp - cp && !memcmp("tagger ", cp, 7)) { + const char *tagger = cp; + + /* Found the tagger line. Copy out the contents + * of the buffer so far. + */ + write_or_die(1, buf, cp - buf); + + /* + * Do something intelligent, like pretty-printing + * the date. + */ + while (cp < endp) { + if (*cp++ == '\n') { + /* tagger to cp is a line + * that has ident and time. + */ + const char *sp = tagger; + char *ep; + unsigned long date; + long tz; + while (sp < cp && *sp != '>') + sp++; + if (sp == cp) { + /* give up */ + write_or_die(1, tagger, + cp - tagger); + break; + } + while (sp < cp && + !('0' <= *sp && *sp <= '9')) + sp++; + write_or_die(1, tagger, sp - tagger); + date = strtoul(sp, &ep, 10); + tz = strtol(ep, NULL, 10); + sp = show_date(date, tz, 0); + write_or_die(1, sp, strlen(sp)); + xwrite(1, "\n", 1); + break; + } + } + break; + } + if (cp < endp && *cp == '\n') + /* end of header */ + break; + } + /* At this point, we have copied out the header up to the end of + * the tagger line and cp points at one past \n. It could be the + * next header line after the tagger line, or it could be another + * \n that marks the end of the headers. We need to copy out the + * remainder as is. + */ + if (cp < endp) + write_or_die(1, cp, endp - cp); +} + +int cmd_cat_file(int argc, const char **argv, const char *prefix) +{ + unsigned char sha1[20]; + enum object_type type; + void *buf; + unsigned long size; + int opt; + const char *exp_type, *obj_name; + + git_config(git_default_config); + if (argc != 3) + usage("git-cat-file [-t|-s|-e|-p|<type>] <sha1>"); + exp_type = argv[1]; + obj_name = argv[2]; + + if (get_sha1(obj_name, sha1)) + die("Not a valid object name %s", obj_name); + + opt = 0; + if ( exp_type[0] == '-' ) { + opt = exp_type[1]; + if ( !opt || exp_type[2] ) + opt = -1; /* Not a single character option */ + } + + buf = NULL; + switch (opt) { + case 't': + type = sha1_object_info(sha1, NULL); + if (type > 0) { + printf("%s\n", typename(type)); + return 0; + } + break; + + case 's': + type = sha1_object_info(sha1, &size); + if (type > 0) { + printf("%lu\n", size); + return 0; + } + break; + + case 'e': + return !has_sha1_file(sha1); + + case 'p': + type = sha1_object_info(sha1, NULL); + if (type < 0) + die("Not a valid object name %s", obj_name); + + /* custom pretty-print here */ + if (type == OBJ_TREE) { + const char *ls_args[3] = {"ls-tree", obj_name, NULL}; + return cmd_ls_tree(2, ls_args, NULL); + } + + buf = read_sha1_file(sha1, &type, &size); + if (!buf) + die("Cannot read object %s", obj_name); + if (type == OBJ_TAG) { + pprint_tag(sha1, buf, size); + return 0; + } + + /* otherwise just spit out the data */ + break; + case 0: + buf = read_object_with_reference(sha1, exp_type, &size, NULL); + break; + + default: + die("git-cat-file: unknown option: %s\n", exp_type); + } + + if (!buf) + die("git-cat-file %s: bad file", obj_name); + + write_or_die(1, buf, size); + return 0; +} |