Andrew's git - gitweb.git/blob

1fb07ee08573a8d0f90eadd5608ab8471c4196a5
   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, const char *path, unsigned flags)
  14{
  15        struct stat st;
  16        unsigned char sha1[20];
  17
  18        if (fstat(fd, &st) < 0 ||
  19            index_fd(sha1, fd, &st, type_from_string(type), path, flags))
  20                die((flags & HASH_WRITE_OBJECT)
  21                    ? "Unable to add %s to database"
  22                    : "Unable to hash %s", path);
  23        printf("%s\n", sha1_to_hex(sha1));
  24        maybe_flush_or_die(stdout, "hash to stdout");
  25}
  26
  27static void hash_object(const char *path, const char *type, const char *vpath,
  28                        unsigned flags)
  29{
  30        int fd;
  31        fd = open(path, O_RDONLY);
  32        if (fd < 0)
  33                die_errno("Cannot open '%s'", path);
  34        hash_fd(fd, type, vpath, flags);
  35}
  36
  37static void hash_stdin_paths(const char *type, int no_filters, unsigned flags)
  38{
  39        struct strbuf buf = STRBUF_INIT, nbuf = STRBUF_INIT;
  40
  41        while (strbuf_getline(&buf, stdin, '\n') != EOF) {
  42                if (buf.buf[0] == '"') {
  43                        strbuf_reset(&nbuf);
  44                        if (unquote_c_style(&nbuf, buf.buf, NULL))
  45                                die("line is badly quoted");
  46                        strbuf_swap(&buf, &nbuf);
  47                }
  48                hash_object(buf.buf, type, no_filters ? NULL : buf.buf, flags);
  49        }
  50        strbuf_release(&buf);
  51        strbuf_release(&nbuf);
  52}
  53
  54int cmd_hash_object(int argc, const char **argv, const char *prefix)
  55{
  56        static const char * const hash_object_usage[] = {
  57                N_("git hash-object [-t <type>] [-w] [--path=<file>|--no-filters] [--stdin] [--] <file>..."),
  58                N_("git hash-object  --stdin-paths < <list-of-paths>"),
  59                NULL
  60        };
  61        const char *type = blob_type;
  62        int hashstdin = 0;
  63        int stdin_paths = 0;
  64        int no_filters = 0;
  65        unsigned flags = HASH_FORMAT_CHECK;
  66        const char *vpath = NULL;
  67        const struct option hash_object_options[] = {
  68                OPT_STRING('t', NULL, &type, N_("type"), N_("object type")),
  69                OPT_BIT('w', NULL, &flags, N_("write the object into the object database"),
  70                        HASH_WRITE_OBJECT),
  71                OPT_COUNTUP( 0 , "stdin", &hashstdin, N_("read the object from stdin")),
  72                OPT_BOOL( 0 , "stdin-paths", &stdin_paths, N_("read file names from stdin")),
  73                OPT_BOOL( 0 , "no-filters", &no_filters, N_("store file as is without filters")),
  74                OPT_STRING( 0 , "path", &vpath, N_("file"), N_("process file as it were from this path")),
  75                OPT_END()
  76        };
  77        int i;
  78        int prefix_length = -1;
  79        const char *errstr = NULL;
  80
  81        argc = parse_options(argc, argv, NULL, hash_object_options,
  82                             hash_object_usage, 0);
  83
  84        if (flags & HASH_WRITE_OBJECT) {
  85                prefix = setup_git_directory();
  86                prefix_length = prefix ? strlen(prefix) : 0;
  87                if (vpath && prefix)
  88                        vpath = prefix_filename(prefix, prefix_length, vpath);
  89        }
  90
  91        git_config(git_default_config, NULL);
  92
  93        if (stdin_paths) {
  94                if (hashstdin)
  95                        errstr = "Can't use --stdin-paths with --stdin";
  96                else if (argc)
  97                        errstr = "Can't specify files with --stdin-paths";
  98                else if (vpath)
  99                        errstr = "Can't use --stdin-paths with --path";
 100        }
 101        else {
 102                if (hashstdin > 1)
 103                        errstr = "Multiple --stdin arguments are not supported";
 104                if (vpath && no_filters)
 105                        errstr = "Can't use --path with --no-filters";
 106        }
 107
 108        if (errstr) {
 109                error("%s", errstr);
 110                usage_with_options(hash_object_usage, hash_object_options);
 111        }
 112
 113        if (hashstdin)
 114                hash_fd(0, type, vpath, flags);
 115
 116        for (i = 0 ; i < argc; i++) {
 117                const char *arg = argv[i];
 118
 119                if (0 <= prefix_length)
 120                        arg = prefix_filename(prefix, prefix_length, arg);
 121                hash_object(arg, type, no_filters ? NULL : vpath ? vpath : arg,
 122                            flags);
 123        }
 124
 125        if (stdin_paths)
 126                hash_stdin_paths(type, no_filters, flags);
 127
 128        return 0;
 129}