commit, merge: initialize static strbuf

[git.git] / builtin-cat-file.c

diff --git a/builtin-cat-file.c b/builtin-cat-file.c
index f132d583d3e2a2ac0fe696b66723c846902d0a19..7441a56acdbefdd8044a406f4d756ce8a4f06644 100644 (file)
--- a/builtin-cat-file.c
+++ b/builtin-cat-file.c
@@ -8,6 +8,10 @@
 #include "tag.h"
 #include "tree.h"
 #include "builtin.h"
+#include "parse-options.h"
+
+#define BATCH 1
+#define BATCH_CHECK 2
 
 static void pprint_tag(const unsigned char *sha1, const char *buf, unsigned long size)
 {
@@ -76,31 +80,16 @@ static void pprint_tag(const unsigned char *sha1, const char *buf, unsigned long
                write_or_die(1, cp, endp - cp);
 }
 
-int cmd_cat_file(int argc, const char **argv, const char *prefix)
+static int cat_one_file(int opt, const char *exp_type, const char *obj_name)
 {
        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':
@@ -157,3 +146,113 @@ int cmd_cat_file(int argc, const char **argv, const char *prefix)
        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);
+               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(&buf, 0);
+       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>] <sha1>",
+       "git cat-file [--batch|--batch-check] < <list_of_sha1s>",
+       NULL
+};
+
+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, "batch", &batch,
+                           "show info and content of objects feeded on stdin", BATCH),
+               OPT_SET_INT(0, "batch-check", &batch,
+                           "show info about objects feeded on stdin",
+                           BATCH_CHECK),
+               OPT_END()
+       };
+
+       git_config(git_default_config, NULL);
+
+       if (argc != 3 && argc != 2)
+               usage_with_options(cat_file_usage, options);
+
+       argc = parse_options(argc, argv, 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);
+}