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>] [--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 const char *vpath;
  65
  66static const struct option hash_object_options[] = {
  67        OPT_STRING('t', NULL, &type, "type", "object type"),
  68        OPT_BOOLEAN('w', NULL, &write_object, "write the object into the object database"),
  69        OPT_BOOLEAN( 0 , "stdin", &hashstdin, "read the object from stdin"),
  70        OPT_BOOLEAN( 0 , "stdin-paths", &stdin_paths, "read file names from stdin"),
  71        OPT_STRING( 0 , "path", &vpath, "file", "process file as it were from this path"),
  72        OPT_END()
  73};
  74
  75int main(int argc, const char **argv)
  76{
  77        int i;
  78        const char *prefix = NULL;
  79        int prefix_length = -1;
  80        const char *errstr = NULL;
  81
  82        type = blob_type;
  83
  84        git_config(git_default_config, NULL);
  85
  86        argc = parse_options(argc, argv, hash_object_options, hash_object_usage, 0);
  87
  88        if (write_object) {
  89                prefix = setup_git_directory();
  90                prefix_length = prefix ? strlen(prefix) : 0;
  91                if (vpath && prefix)
  92                        vpath = prefix_filename(prefix, prefix_length, vpath);
  93        }
  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 if (hashstdin > 1)
 104                errstr = "Multiple --stdin arguments are not supported";
 105
 106        if (errstr) {
 107                error (errstr);
 108                usage_with_options(hash_object_usage, hash_object_options);
 109        }
 110
 111        if (hashstdin)
 112                hash_fd(0, type, write_object, vpath);
 113
 114        for (i = 0 ; i < argc; i++) {
 115                const char *arg = argv[i];
 116
 117                if (0 <= prefix_length)
 118                        arg = prefix_filename(prefix, prefix_length, arg);
 119                hash_object(arg, type, write_object, vpath ? vpath : arg);
 120        }
 121
 122        if (stdin_paths)
 123                hash_stdin_paths(type, write_object);
 124
 125        return 0;
 126}