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 = STRBUF_INIT, nbuf = STRBUF_INIT;
  38
  39        while (strbuf_getline(&buf, stdin, '\n') != EOF) {
  40                if (buf.buf[0] == '"') {
  41                        strbuf_reset(&nbuf);
  42                        if (unquote_c_style(&nbuf, buf.buf, NULL))
  43                                die("line is badly quoted");
  44                        strbuf_swap(&buf, &nbuf);
  45                }
  46                hash_object(buf.buf, type, write_objects, buf.buf);
  47        }
  48        strbuf_release(&buf);
  49        strbuf_release(&nbuf);
  50}
  51
  52static const char * const hash_object_usage[] = {
  53        "git hash-object [-t <type>] [-w] [--path=<file>|--no-filters] [--stdin] [--] <file>...",
  54        "git hash-object  --stdin-paths < <list-of-paths>",
  55        NULL
  56};
  57
  58static const char *type;
  59static int write_object;
  60static int hashstdin;
  61static int stdin_paths;
  62static int no_filters;
  63static const char *vpath;
  64
  65static const struct option hash_object_options[] = {
  66        OPT_STRING('t', NULL, &type, "type", "object type"),
  67        OPT_BOOLEAN('w', NULL, &write_object, "write the object into the object database"),
  68        OPT_BOOLEAN( 0 , "stdin", &hashstdin, "read the object from stdin"),
  69        OPT_BOOLEAN( 0 , "stdin-paths", &stdin_paths, "read file names from stdin"),
  70        OPT_BOOLEAN( 0 , "no-filters", &no_filters, "store file as is without filters"),
  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        argc = parse_options(argc, argv, hash_object_options, 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                else if (no_filters)
 103                        errstr = "Can't use --stdin-paths with --no-filters";
 104        }
 105        else {
 106                if (hashstdin > 1)
 107                        errstr = "Multiple --stdin arguments are not supported";
 108                if (vpath && no_filters)
 109                        errstr = "Can't use --path with --no-filters";
 110        }
 111
 112        if (errstr) {
 113                error("%s", errstr);
 114                usage_with_options(hash_object_usage, hash_object_options);
 115        }
 116
 117        if (hashstdin)
 118                hash_fd(0, type, write_object, vpath);
 119
 120        for (i = 0 ; i < argc; i++) {
 121                const char *arg = argv[i];
 122
 123                if (0 <= prefix_length)
 124                        arg = prefix_filename(prefix, prefix_length, arg);
 125                hash_object(arg, type, write_object,
 126                            no_filters ? NULL : vpath ? vpath : arg);
 127        }
 128
 129        if (stdin_paths)
 130                hash_stdin_paths(type, write_object);
 131
 132        return 0;
 133}