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-rw-r--r--builtin/cat-file.c286
1 files changed, 286 insertions, 0 deletions
diff --git a/builtin/cat-file.c b/builtin/cat-file.c
new file mode 100644
index 0000000000..8ed501f220
--- /dev/null
+++ b/builtin/cat-file.c
@@ -0,0 +1,286 @@
+/*
+ * 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"
+#include "parse-options.h"
+#include "diff.h"
+#include "userdiff.h"
+
+#define BATCH 1
+#define BATCH_CHECK 2
+
+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);
+}
+
+static int cat_one_file(int opt, const char *exp_type, const char *obj_name)
+{
+ unsigned char sha1[20];
+ enum object_type type;
+ char *buf;
+ unsigned long size;
+ struct object_context obj_context;
+
+ if (get_sha1_with_context(obj_name, sha1, &obj_context))
+ die("Not a valid object name %s", obj_name);
+
+ 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] = { NULL };
+ ls_args[0] = "ls-tree";
+ ls_args[1] = obj_name;
+ 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 'c':
+ if (!obj_context.path[0])
+ die("git cat-file --textconv %s: <object> must be <sha1:path>",
+ obj_name);
+
+ if (!textconv_object(obj_context.path, obj_context.mode, sha1, &buf, &size))
+ die("git cat-file --textconv: unable to run textconv on %s",
+ obj_name);
+ break;
+
+ case 0:
+ buf = read_object_with_reference(sha1, exp_type, &size, NULL);
+ break;
+
+ default:
+ die("git cat-file: unknown option: %s", exp_type);
+ }
+
+ if (!buf)
+ die("git cat-file %s: bad file", obj_name);
+
+ write_or_die(1, buf, size);
+ return 0;
+}
+
+static int batch_one_object(const char *obj_name, int print_contents)
+{
+ unsigned char sha1[20];
+ enum object_type type = 0;
+ unsigned long size;
+ void *contents = contents;
+
+ if (!obj_name)
+ return 1;
+
+ if (get_sha1(obj_name, sha1)) {
+ printf("%s missing\n", obj_name);
+ fflush(stdout);
+ return 0;
+ }
+
+ if (print_contents == BATCH)
+ contents = read_sha1_file(sha1, &type, &size);
+ else
+ type = sha1_object_info(sha1, &size);
+
+ if (type <= 0) {
+ printf("%s missing\n", obj_name);
+ fflush(stdout);
+ if (print_contents == BATCH)
+ free(contents);
+ return 0;
+ }
+
+ printf("%s %s %lu\n", sha1_to_hex(sha1), typename(type), size);
+ fflush(stdout);
+
+ if (print_contents == BATCH) {
+ write_or_die(1, contents, size);
+ printf("\n");
+ fflush(stdout);
+ free(contents);
+ }
+
+ return 0;
+}
+
+static int batch_objects(int print_contents)
+{
+ struct strbuf buf = STRBUF_INIT;
+
+ while (strbuf_getline(&buf, stdin, '\n') != EOF) {
+ int error = batch_one_object(buf.buf, print_contents);
+ if (error)
+ return error;
+ }
+
+ return 0;
+}
+
+static const char * const cat_file_usage[] = {
+ "git cat-file (-t|-s|-e|-p|<type>|--textconv) <object>",
+ "git cat-file (--batch|--batch-check) < <list_of_objects>",
+ NULL
+};
+
+static int git_cat_file_config(const char *var, const char *value, void *cb)
+{
+ if (userdiff_config(var, value) < 0)
+ return -1;
+
+ return git_default_config(var, value, cb);
+}
+
+int cmd_cat_file(int argc, const char **argv, const char *prefix)
+{
+ int opt = 0, batch = 0;
+ const char *exp_type = NULL, *obj_name = NULL;
+
+ const struct option options[] = {
+ OPT_GROUP("<type> can be one of: blob, tree, commit, tag"),
+ OPT_SET_INT('t', NULL, &opt, "show object type", 't'),
+ OPT_SET_INT('s', NULL, &opt, "show object size", 's'),
+ OPT_SET_INT('e', NULL, &opt,
+ "exit with zero when there's no error", 'e'),
+ OPT_SET_INT('p', NULL, &opt, "pretty-print object's content", 'p'),
+ OPT_SET_INT(0, "textconv", &opt,
+ "for blob objects, run textconv on object's content", 'c'),
+ OPT_SET_INT(0, "batch", &batch,
+ "show info and content of objects fed from the standard input",
+ BATCH),
+ OPT_SET_INT(0, "batch-check", &batch,
+ "show info about objects fed from the standard input",
+ BATCH_CHECK),
+ OPT_END()
+ };
+
+ git_config(git_cat_file_config, NULL);
+
+ if (argc != 3 && argc != 2)
+ usage_with_options(cat_file_usage, options);
+
+ argc = parse_options(argc, argv, prefix, options, cat_file_usage, 0);
+
+ if (opt) {
+ if (argc == 1)
+ obj_name = argv[0];
+ else
+ usage_with_options(cat_file_usage, options);
+ }
+ if (!opt && !batch) {
+ if (argc == 2) {
+ exp_type = argv[0];
+ obj_name = argv[1];
+ } else
+ usage_with_options(cat_file_usage, options);
+ }
+ if (batch && (opt || argc)) {
+ usage_with_options(cat_file_usage, options);
+ }
+
+ if (batch)
+ return batch_objects(batch);
+
+ return cat_one_file(opt, exp_type, obj_name);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-17 21:51:11 +0000