Andrew's git / gitweb.git / builtin/submodule--helper.c
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builtin / submodule--helper.con commit Merge branch 'rs/use-modern-git-merge-syntax' of git-gui into rs/git-gui-use-modern-git-merge-syntax (ff65e79)
   1#include "builtin.h"
   2#include "cache.h"
   3#include "parse-options.h"
   4#include "quote.h"
   5#include "pathspec.h"
   6#include "dir.h"
   7#include "utf8.h"
   8#include "submodule.h"
   9#include "submodule-config.h"
  10#include "string-list.h"
  11#include "run-command.h"
  12
  13struct module_list {
  14        const struct cache_entry **entries;
  15        int alloc, nr;
  16};
  17#define MODULE_LIST_INIT { NULL, 0, 0 }
  18
  19static int module_list_compute(int argc, const char **argv,
  20                               const char *prefix,
  21                               struct pathspec *pathspec,
  22                               struct module_list *list)
  23{
  24        int i, result = 0;
  25        char *ps_matched = NULL;
  26        parse_pathspec(pathspec, 0,
  27                       PATHSPEC_PREFER_FULL |
  28                       PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP,
  29                       prefix, argv);
  30
  31        if (pathspec->nr)
  32                ps_matched = xcalloc(pathspec->nr, 1);
  33
  34        if (read_cache() < 0)
  35                die(_("index file corrupt"));
  36
  37        for (i = 0; i < active_nr; i++) {
  38                const struct cache_entry *ce = active_cache[i];
  39
  40                if (!match_pathspec(pathspec, ce->name, ce_namelen(ce),
  41                                    0, ps_matched, 1) ||
  42                    !S_ISGITLINK(ce->ce_mode))
  43                        continue;
  44
  45                ALLOC_GROW(list->entries, list->nr + 1, list->alloc);
  46                list->entries[list->nr++] = ce;
  47                while (i + 1 < active_nr &&
  48                       !strcmp(ce->name, active_cache[i + 1]->name))
  49                        /*
  50                         * Skip entries with the same name in different stages
  51                         * to make sure an entry is returned only once.
  52                         */
  53                        i++;
  54        }
  55
  56        if (ps_matched && report_path_error(ps_matched, pathspec, prefix))
  57                result = -1;
  58
  59        free(ps_matched);
  60
  61        return result;
  62}
  63
  64static int module_list(int argc, const char **argv, const char *prefix)
  65{
  66        int i;
  67        struct pathspec pathspec;
  68        struct module_list list = MODULE_LIST_INIT;
  69
  70        struct option module_list_options[] = {
  71                OPT_STRING(0, "prefix", &prefix,
  72                           N_("path"),
  73                           N_("alternative anchor for relative paths")),
  74                OPT_END()
  75        };
  76
  77        const char *const git_submodule_helper_usage[] = {
  78                N_("git submodule--helper list [--prefix=<path>] [<path>...]"),
  79                NULL
  80        };
  81
  82        argc = parse_options(argc, argv, prefix, module_list_options,
  83                             git_submodule_helper_usage, 0);
  84
  85        if (module_list_compute(argc, argv, prefix, &pathspec, &list) < 0) {
  86                printf("#unmatched\n");
  87                return 1;
  88        }
  89
  90        for (i = 0; i < list.nr; i++) {
  91                const struct cache_entry *ce = list.entries[i];
  92
  93                if (ce_stage(ce))
  94                        printf("%06o %s U\t", ce->ce_mode, sha1_to_hex(null_sha1));
  95                else
  96                        printf("%06o %s %d\t", ce->ce_mode, sha1_to_hex(ce->sha1), ce_stage(ce));
  97
  98                utf8_fprintf(stdout, "%s\n", ce->name);
  99        }
 100        return 0;
 101}
 102
 103static int module_name(int argc, const char **argv, const char *prefix)
 104{
 105        const struct submodule *sub;
 106
 107        if (argc != 2)
 108                usage(_("git submodule--helper name <path>"));
 109
 110        gitmodules_config();
 111        sub = submodule_from_path(null_sha1, argv[1]);
 112
 113        if (!sub)
 114                die(_("no submodule mapping found in .gitmodules for path '%s'"),
 115                    argv[1]);
 116
 117        printf("%s\n", sub->name);
 118
 119        return 0;
 120}
 121static int clone_submodule(const char *path, const char *gitdir, const char *url,
 122                           const char *depth, const char *reference, int quiet)
 123{
 124        struct child_process cp;
 125        child_process_init(&cp);
 126
 127        argv_array_push(&cp.args, "clone");
 128        argv_array_push(&cp.args, "--no-checkout");
 129        if (quiet)
 130                argv_array_push(&cp.args, "--quiet");
 131        if (depth && *depth)
 132                argv_array_pushl(&cp.args, "--depth", depth, NULL);
 133        if (reference && *reference)
 134                argv_array_pushl(&cp.args, "--reference", reference, NULL);
 135        if (gitdir && *gitdir)
 136                argv_array_pushl(&cp.args, "--separate-git-dir", gitdir, NULL);
 137
 138        argv_array_push(&cp.args, url);
 139        argv_array_push(&cp.args, path);
 140
 141        cp.git_cmd = 1;
 142        cp.env = local_repo_env;
 143        cp.no_stdin = 1;
 144
 145        return run_command(&cp);
 146}
 147
 148static int module_clone(int argc, const char **argv, const char *prefix)
 149{
 150        const char *name = NULL, *url = NULL;
 151        const char *reference = NULL, *depth = NULL;
 152        int quiet = 0;
 153        FILE *submodule_dot_git;
 154        char *p, *path = NULL, *sm_gitdir;
 155        struct strbuf rel_path = STRBUF_INIT;
 156        struct strbuf sb = STRBUF_INIT;
 157
 158        struct option module_clone_options[] = {
 159                OPT_STRING(0, "prefix", &prefix,
 160                           N_("path"),
 161                           N_("alternative anchor for relative paths")),
 162                OPT_STRING(0, "path", &path,
 163                           N_("path"),
 164                           N_("where the new submodule will be cloned to")),
 165                OPT_STRING(0, "name", &name,
 166                           N_("string"),
 167                           N_("name of the new submodule")),
 168                OPT_STRING(0, "url", &url,
 169                           N_("string"),
 170                           N_("url where to clone the submodule from")),
 171                OPT_STRING(0, "reference", &reference,
 172                           N_("string"),
 173                           N_("reference repository")),
 174                OPT_STRING(0, "depth", &depth,
 175                           N_("string"),
 176                           N_("depth for shallow clones")),
 177                OPT__QUIET(&quiet, "Suppress output for cloning a submodule"),
 178                OPT_END()
 179        };
 180
 181        const char *const git_submodule_helper_usage[] = {
 182                N_("git submodule--helper clone [--prefix=<path>] [--quiet] "
 183                   "[--reference <repository>] [--name <name>] [--url <url>]"
 184                   "[--depth <depth>] [--] [<path>...]"),
 185                NULL
 186        };
 187
 188        argc = parse_options(argc, argv, prefix, module_clone_options,
 189                             git_submodule_helper_usage, 0);
 190
 191        if (!path || !*path)
 192                die(_("submodule--helper: unspecified or empty --path"));
 193
 194        strbuf_addf(&sb, "%s/modules/%s", get_git_dir(), name);
 195        sm_gitdir = xstrdup(absolute_path(sb.buf));
 196        strbuf_reset(&sb);
 197
 198        if (!is_absolute_path(path)) {
 199                strbuf_addf(&sb, "%s/%s", get_git_work_tree(), path);
 200                path = strbuf_detach(&sb, NULL);
 201        } else
 202                path = xstrdup(path);
 203
 204        if (!file_exists(sm_gitdir)) {
 205                if (safe_create_leading_directories_const(sm_gitdir) < 0)
 206                        die(_("could not create directory '%s'"), sm_gitdir);
 207                if (clone_submodule(path, sm_gitdir, url, depth, reference, quiet))
 208                        die(_("clone of '%s' into submodule path '%s' failed"),
 209                            url, path);
 210        } else {
 211                if (safe_create_leading_directories_const(path) < 0)
 212                        die(_("could not create directory '%s'"), path);
 213                strbuf_addf(&sb, "%s/index", sm_gitdir);
 214                unlink_or_warn(sb.buf);
 215                strbuf_reset(&sb);
 216        }
 217
 218        /* Write a .git file in the submodule to redirect to the superproject. */
 219        strbuf_addf(&sb, "%s/.git", path);
 220        if (safe_create_leading_directories_const(sb.buf) < 0)
 221                die(_("could not create leading directories of '%s'"), sb.buf);
 222        submodule_dot_git = fopen(sb.buf, "w");
 223        if (!submodule_dot_git)
 224                die_errno(_("cannot open file '%s'"), sb.buf);
 225
 226        fprintf_or_die(submodule_dot_git, "gitdir: %s\n",
 227                       relative_path(sm_gitdir, path, &rel_path));
 228        if (fclose(submodule_dot_git))
 229                die(_("could not close file %s"), sb.buf);
 230        strbuf_reset(&sb);
 231        strbuf_reset(&rel_path);
 232
 233        /* Redirect the worktree of the submodule in the superproject's config */
 234        p = git_pathdup_submodule(path, "config");
 235        if (!p)
 236                die(_("could not get submodule directory for '%s'"), path);
 237        git_config_set_in_file(p, "core.worktree",
 238                               relative_path(path, sm_gitdir, &rel_path));
 239        strbuf_release(&sb);
 240        strbuf_release(&rel_path);
 241        free(sm_gitdir);
 242        free(path);
 243        free(p);
 244        return 0;
 245}
 246
 247struct cmd_struct {
 248        const char *cmd;
 249        int (*fn)(int, const char **, const char *);
 250};
 251
 252static struct cmd_struct commands[] = {
 253        {"list", module_list},
 254        {"name", module_name},
 255        {"clone", module_clone},
 256};
 257
 258int cmd_submodule__helper(int argc, const char **argv, const char *prefix)
 259{
 260        int i;
 261        if (argc < 2)
 262                die(_("fatal: submodule--helper subcommand must be "
 263                      "called with a subcommand"));
 264
 265        for (i = 0; i < ARRAY_SIZE(commands); i++)
 266                if (!strcmp(argv[1], commands[i].cmd))
 267                        return commands[i].fn(argc - 1, argv + 1, prefix);
 268
 269        die(_("fatal: '%s' is not a valid submodule--helper "
 270              "subcommand"), argv[1]);
 271}