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                        const char *vpath)
  27{
  28        int fd;
  29        fd = open(path, O_RDONLY);
  30        if (fd < 0)
  31                die("Cannot open %s", path);
  32        hash_fd(fd, type, write_object, vpath);
  33}
  34
  35static void hash_stdin_paths(const char *type, int write_objects)
  36{
  37        struct strbuf buf, nbuf;
  38
  39        strbuf_init(&buf, 0);
  40        strbuf_init(&nbuf, 0);
  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, write_objects, buf.buf);
  49        }
  50        strbuf_release(&buf);
  51        strbuf_release(&nbuf);
  52}
  53
  54static const char * const hash_object_usage[] = {
  55        "git hash-object [-t <type>] [-w] [--path=<file>|--no-filters] [--stdin] [--] <file>...",
  56        "git hash-object  --stdin-paths < <list-of-paths>",
  57        NULL
  58};
  59
  60static const char *type;
  61static int write_object;
  62static int hashstdin;
  63static int stdin_paths;
  64static int no_filters;
  65static const char *vpath;
  66
  67static const struct option hash_object_options[] = {
  68        OPT_STRING('t', NULL, &type, "type", "object type"),
  69        OPT_BOOLEAN('w', NULL, &write_object, "write the object into the object database"),
  70        OPT_BOOLEAN( 0 , "stdin", &hashstdin, "read the object from stdin"),
  71        OPT_BOOLEAN( 0 , "stdin-paths", &stdin_paths, "read file names from stdin"),
  72        OPT_BOOLEAN( 0 , "no-filters", &no_filters, "store file as is without filters"),
  73        OPT_STRING( 0 , "path", &vpath, "file", "process file as it were from this path"),
  74        OPT_END()
  75};
  76
  77int main(int argc, const char **argv)
  78{
  79        int i;
  80        const char *prefix = NULL;
  81        int prefix_length = -1;
  82        const char *errstr = NULL;
  83
  84        type = blob_type;
  85
  86        git_config(git_default_config, NULL);
  87
  88        argc = parse_options(argc, argv, hash_object_options, hash_object_usage, 0);
  89
  90        if (write_object) {
  91                prefix = setup_git_directory();
  92                prefix_length = prefix ? strlen(prefix) : 0;
  93                if (vpath && prefix)
  94                        vpath = prefix_filename(prefix, prefix_length, vpath);
  95        }
  96
  97        if (stdin_paths) {
  98                if (hashstdin)
  99                        errstr = "Can't use --stdin-paths with --stdin";
 100                else if (argc)
 101                        errstr = "Can't specify files with --stdin-paths";
 102                else if (vpath)
 103                        errstr = "Can't use --stdin-paths with --path";
 104                else if (no_filters)
 105                        errstr = "Can't use --stdin-paths with --no-filters";
 106        }
 107        else {
 108                if (hashstdin > 1)
 109                        errstr = "Multiple --stdin arguments are not supported";
 110                if (vpath && no_filters)
 111                        errstr = "Can't use --path with --no-filters";
 112        }
 113
 114        if (errstr) {
 115                error (errstr);
 116                usage_with_options(hash_object_usage, hash_object_options);
 117        }
 118
 119        if (hashstdin)
 120                hash_fd(0, type, write_object, vpath);
 121
 122        for (i = 0 ; i < argc; i++) {
 123                const char *arg = argv[i];
 124
 125                if (0 <= prefix_length)
 126                        arg = prefix_filename(prefix, prefix_length, arg);
 127                hash_object(arg, type, write_object,
 128                            no_filters ? NULL : vpath ? vpath : arg);
 129        }
 130
 131        if (stdin_paths)
 132                hash_stdin_paths(type, write_object);
 133
 134        return 0;
 135}