Andrew's git - gitweb.git/blob

   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 "cache.h"
   8#include "blob.h"
   9#include "quote.h"
  10#include "parse-options.h"
  11
  12static void hash_fd(int fd, const char *type, int write_object, const char *path)
  13{
  14        struct stat st;
  15        unsigned char sha1[20];
  16        if (fstat(fd, &st) < 0 ||
  17            index_fd(sha1, fd, &st, write_object, type_from_string(type), path))
  18                die(write_object
  19                    ? "Unable to add %s to database"
  20                    : "Unable to hash %s", path);
  21        printf("%s\n", sha1_to_hex(sha1));
  22        maybe_flush_or_die(stdout, "hash to stdout");
  23}
  24
  25static void hash_object(const char *path, const char *type, int write_object)
  26{
  27        int fd;
  28        fd = open(path, O_RDONLY);
  29        if (fd < 0)
  30                die("Cannot open %s", path);
  31        hash_fd(fd, type, write_object, path);
  32}
  33
  34static void hash_stdin_paths(const char *type, int write_objects)
  35{
  36        struct strbuf buf, nbuf;
  37
  38        strbuf_init(&buf, 0);
  39        strbuf_init(&nbuf, 0);
  40        while (strbuf_getline(&buf, stdin, '\n') != EOF) {
  41                if (buf.buf[0] == '"') {
  42                        strbuf_reset(&nbuf);
  43                        if (unquote_c_style(&nbuf, buf.buf, NULL))
  44                                die("line is badly quoted");
  45                        strbuf_swap(&buf, &nbuf);
  46                }
  47                hash_object(buf.buf, type, write_objects);
  48        }
  49        strbuf_release(&buf);
  50        strbuf_release(&nbuf);
  51}
  52
  53static const char * const hash_object_usage[] = {
  54        "git hash-object [-t <type>] [-w] [--stdin] [--] <file>...",
  55        "git hash-object  --stdin-paths < <list-of-paths>",
  56        NULL
  57};
  58
  59static const char *type;
  60static int write_object;
  61static int hashstdin;
  62static int stdin_paths;
  63
  64static const struct option hash_object_options[] = {
  65        OPT_STRING('t', NULL, &type, "type", "object type"),
  66        OPT_BOOLEAN('w', NULL, &write_object, "write the object into the object database"),
  67        OPT_BOOLEAN( 0 , "stdin", &hashstdin, "read the object from stdin"),
  68        OPT_BOOLEAN( 0 , "stdin-paths", &stdin_paths, "read file names from stdin"),
  69        OPT_END()
  70};
  71
  72int main(int argc, const char **argv)
  73{
  74        int i;
  75        const char *prefix = NULL;
  76        int prefix_length = -1;
  77        const char *errstr = NULL;
  78
  79        type = blob_type;
  80
  81        git_config(git_default_config, NULL);
  82
  83        argc = parse_options(argc, argv, hash_object_options, hash_object_usage, 0);
  84
  85        if (write_object) {
  86                prefix = setup_git_directory();
  87                prefix_length = prefix ? strlen(prefix) : 0;
  88        }
  89
  90        if (stdin_paths) {
  91                if (hashstdin)
  92                        errstr = "Can't use --stdin-paths with --stdin";
  93                else if (argc)
  94                        errstr = "Can't specify files with --stdin-paths";
  95        }
  96        else if (hashstdin > 1)
  97                errstr = "Multiple --stdin arguments are not supported";
  98
  99        if (errstr) {
 100                error (errstr);
 101                usage_with_options(hash_object_usage, hash_object_options);
 102        }
 103
 104        if (hashstdin)
 105                hash_fd(0, type, write_object, NULL);
 106
 107        for (i = 0 ; i < argc; i++) {
 108                const char *arg = argv[i];
 109
 110                if (0 <= prefix_length)
 111                        arg = prefix_filename(prefix, prefix_length, arg);
 112                hash_object(arg, type, write_object);
 113        }
 114
 115        if (stdin_paths)
 116                hash_stdin_paths(type, write_object);
 117
 118        return 0;
 119}