builtin / bundle.con commit fast-import: Improve robustness when D->F changes provided in wrong order (253fb5f)
   1#include "builtin.h"
   2#include "cache.h"
   3#include "bundle.h"
   4
   5/*
   6 * Basic handler for bundle files to connect repositories via sneakernet.
   7 * Invocation must include action.
   8 * This function can create a bundle or provide information on an existing
   9 * bundle supporting "fetch", "pull", and "ls-remote".
  10 */
  11
  12static const char builtin_bundle_usage[] =
  13  "git bundle create <file> <git-rev-list args>\n"
  14  "   or: git bundle verify <file>\n"
  15  "   or: git bundle list-heads <file> [refname...]\n"
  16  "   or: git bundle unbundle <file> [refname...]";
  17
  18int cmd_bundle(int argc, const char **argv, const char *prefix)
  19{
  20        struct bundle_header header;
  21        int nongit;
  22        const char *cmd, *bundle_file;
  23        int bundle_fd = -1;
  24        char buffer[PATH_MAX];
  25
  26        if (argc < 3)
  27                usage(builtin_bundle_usage);
  28
  29        cmd = argv[1];
  30        bundle_file = argv[2];
  31        argc -= 2;
  32        argv += 2;
  33
  34        prefix = setup_git_directory_gently(&nongit);
  35        if (prefix && bundle_file[0] != '/') {
  36                snprintf(buffer, sizeof(buffer), "%s/%s", prefix, bundle_file);
  37                bundle_file = buffer;
  38        }
  39
  40        memset(&header, 0, sizeof(header));
  41        if (strcmp(cmd, "create") && (bundle_fd =
  42                                read_bundle_header(bundle_file, &header)) < 0)
  43                return 1;
  44
  45        if (!strcmp(cmd, "verify")) {
  46                close(bundle_fd);
  47                if (verify_bundle(&header, 1))
  48                        return 1;
  49                fprintf(stderr, "%s is okay\n", bundle_file);
  50                return 0;
  51        }
  52        if (!strcmp(cmd, "list-heads")) {
  53                close(bundle_fd);
  54                return !!list_bundle_refs(&header, argc, argv);
  55        }
  56        if (!strcmp(cmd, "create")) {
  57                if (nongit)
  58                        die("Need a repository to create a bundle.");
  59                return !!create_bundle(&header, bundle_file, argc, argv);
  60        } else if (!strcmp(cmd, "unbundle")) {
  61                if (nongit)
  62                        die("Need a repository to unbundle.");
  63                return !!unbundle(&header, bundle_fd) ||
  64                        list_bundle_refs(&header, argc, argv);
  65        } else
  66                usage(builtin_bundle_usage);
  67}