Andrew's git - gitweb.git/blob

40008e256f496bb0409b35cfe80173ff8c50967e
   1/*
   2 * GIT - The information manager from hell
   3 *
   4 * Copyright (C) Linus Torvalds, 2005
   5 * Copyright (C) Junio C Hamano, 2005
   6 */
   7#include "builtin.h"
   8#include "blob.h"
   9#include "quote.h"
  10#include "parse-options.h"
  11#include "exec_cmd.h"
  12
  13static void hash_fd(int fd, const char *type, int write_object, const char *path)
  14{
  15        struct stat st;
  16        unsigned char sha1[20];
  17        unsigned flags = (HASH_FORMAT_CHECK |
  18                          (write_object ? HASH_WRITE_OBJECT : 0));
  19
  20        if (fstat(fd, &st) < 0 ||
  21            index_fd(sha1, fd, &st, type_from_string(type), path, flags))
  22                die(write_object
  23                    ? "Unable to add %s to database"
  24                    : "Unable to hash %s", path);
  25        printf("%s\n", sha1_to_hex(sha1));
  26        maybe_flush_or_die(stdout, "hash to stdout");
  27}
  28
  29static void hash_object(const char *path, const char *type, int write_object,
  30                        const char *vpath)
  31{
  32        int fd;
  33        fd = open(path, O_RDONLY);
  34        if (fd < 0)
  35                die_errno("Cannot open '%s'", path);
  36        hash_fd(fd, type, write_object, vpath);
  37}
  38
  39static void hash_stdin_paths(const char *type, int write_objects, int no_filters)
  40{
  41        struct strbuf buf = STRBUF_INIT, nbuf = STRBUF_INIT;
  42
  43        while (strbuf_getline(&buf, stdin, '\n') != EOF) {
  44                if (buf.buf[0] == '"') {
  45                        strbuf_reset(&nbuf);
  46                        if (unquote_c_style(&nbuf, buf.buf, NULL))
  47                                die("line is badly quoted");
  48                        strbuf_swap(&buf, &nbuf);
  49                }
  50                hash_object(buf.buf, type, write_objects,
  51                            no_filters ? NULL : buf.buf);
  52        }
  53        strbuf_release(&buf);
  54        strbuf_release(&nbuf);
  55}
  56
  57int cmd_hash_object(int argc, const char **argv, const char *prefix)
  58{
  59        static const char * const hash_object_usage[] = {
  60                N_("git hash-object [-t <type>] [-w] [--path=<file>|--no-filters] [--stdin] [--] <file>..."),
  61                N_("git hash-object  --stdin-paths < <list-of-paths>"),
  62                NULL
  63        };
  64        const char *type = blob_type;
  65        int hashstdin = 0;
  66        int stdin_paths = 0;
  67        int write_object = 0;
  68        int no_filters = 0;
  69        const char *vpath = NULL;
  70        const struct option hash_object_options[] = {
  71                OPT_STRING('t', NULL, &type, N_("type"), N_("object type")),
  72                OPT_BOOL('w', NULL, &write_object, N_("write the object into the object database")),
  73                OPT_COUNTUP( 0 , "stdin", &hashstdin, N_("read the object from stdin")),
  74                OPT_BOOL( 0 , "stdin-paths", &stdin_paths, N_("read file names from stdin")),
  75                OPT_BOOL( 0 , "no-filters", &no_filters, N_("store file as is without filters")),
  76                OPT_STRING( 0 , "path", &vpath, N_("file"), N_("process file as it were from this path")),
  77                OPT_END()
  78        };
  79        int i;
  80        int prefix_length = -1;
  81        const char *errstr = NULL;
  82
  83        argc = parse_options(argc, argv, NULL, hash_object_options,
  84                             hash_object_usage, 0);
  85
  86        if (write_object) {
  87                prefix = setup_git_directory();
  88                prefix_length = prefix ? strlen(prefix) : 0;
  89                if (vpath && prefix)
  90                        vpath = prefix_filename(prefix, prefix_length, vpath);
  91        }
  92
  93        git_config(git_default_config, NULL);
  94
  95        if (stdin_paths) {
  96                if (hashstdin)
  97                        errstr = "Can't use --stdin-paths with --stdin";
  98                else if (argc)
  99                        errstr = "Can't specify files with --stdin-paths";
 100                else if (vpath)
 101                        errstr = "Can't use --stdin-paths with --path";
 102        }
 103        else {
 104                if (hashstdin > 1)
 105                        errstr = "Multiple --stdin arguments are not supported";
 106                if (vpath && no_filters)
 107                        errstr = "Can't use --path with --no-filters";
 108        }
 109
 110        if (errstr) {
 111                error("%s", errstr);
 112                usage_with_options(hash_object_usage, hash_object_options);
 113        }
 114
 115        if (hashstdin)
 116                hash_fd(0, type, write_object, vpath);
 117
 118        for (i = 0 ; i < argc; i++) {
 119                const char *arg = argv[i];
 120
 121                if (0 <= prefix_length)
 122                        arg = prefix_filename(prefix, prefix_length, arg);
 123                hash_object(arg, type, write_object,
 124                            no_filters ? NULL : vpath ? vpath : arg);
 125        }
 126
 127        if (stdin_paths)
 128                hash_stdin_paths(type, write_object, no_filters);
 129
 130        return 0;
 131}