Git 2.23
[gitweb.git] / builtin / pull.c
index 1f2ecf3a88d95de5f819285aa1fc1558b63b6c4e..f1eaf6e6edb154417e1b38b4f0cfd9d93ef89130 100644 (file)
@@ -5,6 +5,7 @@
  *
  * Fetch one or more remote refs and merge it/them into the current HEAD.
  */
+#define USE_THE_INDEX_COMPATIBILITY_MACROS
 #include "cache.h"
 #include "config.h"
 #include "builtin.h"
@@ -22,6 +23,8 @@
 #include "tempfile.h"
 #include "lockfile.h"
 #include "wt-status.h"
+#include "commit-reach.h"
+#include "sequencer.h"
 
 enum rebase_type {
        REBASE_INVALID = -1,
@@ -48,12 +51,16 @@ static enum rebase_type parse_config_rebase(const char *key, const char *value,
                return REBASE_FALSE;
        else if (v > 0)
                return REBASE_TRUE;
-       else if (!strcmp(value, "preserve"))
+       else if (!strcmp(value, "preserve") || !strcmp(value, "p"))
                return REBASE_PRESERVE;
-       else if (!strcmp(value, "merges"))
+       else if (!strcmp(value, "merges") || !strcmp(value, "m"))
                return REBASE_MERGES;
-       else if (!strcmp(value, "interactive"))
+       else if (!strcmp(value, "interactive") || !strcmp(value, "i"))
                return REBASE_INTERACTIVE;
+       /*
+        * Please update _git_config() in git-completion.bash when you
+        * add new rebase modes.
+        */
 
        if (fatal)
                die(_("Invalid value for %s: %s"), key, value);
@@ -95,6 +102,7 @@ static char *opt_signoff;
 static char *opt_squash;
 static char *opt_commit;
 static char *opt_edit;
+static char *cleanup_arg;
 static char *opt_ff;
 static char *opt_verify_signatures;
 static int opt_autostash = -1;
@@ -120,6 +128,7 @@ static char *opt_update_shallow;
 static char *opt_refmap;
 static char *opt_ipv4;
 static char *opt_ipv6;
+static int opt_show_forced_updates = -1;
 
 static struct option pull_options[] = {
        /* Shared options */
@@ -135,7 +144,7 @@ static struct option pull_options[] = {
        /* Options passed to git-merge or git-rebase */
        OPT_GROUP(N_("Options related to merging")),
        { OPTION_CALLBACK, 'r', "rebase", &opt_rebase,
-         "false|true|merges|preserve|interactive",
+         "(false|true|merges|preserve|interactive)",
          N_("incorporate changes by rebasing rather than merging"),
          PARSE_OPT_OPTARG, parse_opt_rebase },
        OPT_PASSTHRU('n', NULL, &opt_diffstat, NULL,
@@ -162,6 +171,7 @@ static struct option pull_options[] = {
        OPT_PASSTHRU(0, "edit", &opt_edit, NULL,
                N_("edit message before committing"),
                PARSE_OPT_NOARG),
+       OPT_CLEANUP(&cleanup_arg),
        OPT_PASSTHRU(0, "ff", &opt_ff, NULL,
                N_("allow fast-forward"),
                PARSE_OPT_NOARG),
@@ -231,6 +241,8 @@ static struct option pull_options[] = {
        OPT_PASSTHRU('6',  "ipv6", &opt_ipv6, NULL,
                N_("use IPv6 addresses only"),
                PARSE_OPT_NOARG),
+       OPT_BOOL(0, "show-forced-updates", &opt_show_forced_updates,
+                N_("check for forced-updates on all updated branches")),
 
        OPT_END()
 };
@@ -356,16 +368,17 @@ static int git_pull_config(const char *var, const char *value, void *cb)
  */
 static void get_merge_heads(struct oid_array *merge_heads)
 {
-       const char *filename = git_path_fetch_head();
+       const char *filename = git_path_fetch_head(the_repository);
        FILE *fp;
        struct strbuf sb = STRBUF_INIT;
        struct object_id oid;
 
        fp = xfopen(filename, "r");
        while (strbuf_getline_lf(&sb, fp) != EOF) {
-               if (get_oid_hex(sb.buf, &oid))
-                       continue;  /* invalid line: does not start with SHA1 */
-               if (starts_with(sb.buf + GIT_SHA1_HEXSZ, "\tnot-for-merge\t"))
+               const char *p;
+               if (parse_oid_hex(sb.buf, &oid, &p))
+                       continue;  /* invalid line: does not start with object ID */
+               if (starts_with(p, "\tnot-for-merge\t"))
                        continue;  /* ref is not-for-merge */
                oid_array_append(merge_heads, &oid);
        }
@@ -539,6 +552,10 @@ static int run_fetch(const char *repo, const char **refspecs)
                argv_array_push(&args, opt_ipv4);
        if (opt_ipv6)
                argv_array_push(&args, opt_ipv6);
+       if (opt_show_forced_updates > 0)
+               argv_array_push(&args, "--show-forced-updates");
+       else if (opt_show_forced_updates == 0)
+               argv_array_push(&args, "--no-show-forced-updates");
 
        if (repo) {
                argv_array_push(&args, repo);
@@ -556,13 +573,26 @@ static int run_fetch(const char *repo, const char **refspecs)
 static int pull_into_void(const struct object_id *merge_head,
                const struct object_id *curr_head)
 {
+       if (opt_verify_signatures) {
+               struct commit *commit;
+
+               commit = lookup_commit(the_repository, merge_head);
+               if (!commit)
+                       die(_("unable to access commit %s"),
+                           oid_to_hex(merge_head));
+
+               verify_merge_signature(commit, opt_verbosity);
+       }
+
        /*
         * Two-way merge: we treat the index as based on an empty tree,
         * and try to fast-forward to HEAD. This ensures we will not lose
         * index/worktree changes that the user already made on the unborn
         * branch.
         */
-       if (checkout_fast_forward(the_hash_algo->empty_tree, merge_head, 0))
+       if (checkout_fast_forward(the_repository,
+                                 the_hash_algo->empty_tree,
+                                 merge_head, 0))
                return 1;
 
        if (update_ref("initial pull", "HEAD", merge_head, curr_head, 0, UPDATE_REFS_DIE_ON_ERR))
@@ -625,6 +655,8 @@ static int run_merge(void)
                argv_array_push(&args, opt_commit);
        if (opt_edit)
                argv_array_push(&args, opt_edit);
+       if (cleanup_arg)
+               argv_array_pushf(&args, "--cleanup=%s", cleanup_arg);
        if (opt_ff)
                argv_array_push(&args, opt_ff);
        if (opt_verify_signatures)
@@ -673,7 +705,7 @@ static const char *get_upstream_branch(const char *remote)
 }
 
 /**
- * Derives the remote tracking branch from the remote and refspec.
+ * Derives the remote-tracking branch from the remote and refspec.
  *
  * FIXME: The current implementation assumes the default mapping of
  * refs/heads/<branch_name> to refs/remotes/<remote_name>/<branch_name>.
@@ -684,7 +716,7 @@ static const char *get_tracking_branch(const char *remote, const char *refspec)
        const char *spec_src;
        const char *merge_branch;
 
-       refspec_item_init(&spec, refspec, REFSPEC_FETCH);
+       refspec_item_init_or_die(&spec, refspec, REFSPEC_FETCH);
        spec_src = spec.src;
        if (!*spec_src || !strcmp(spec_src, "HEAD"))
                spec_src = "HEAD";
@@ -711,7 +743,7 @@ static const char *get_tracking_branch(const char *remote, const char *refspec)
 
 /**
  * Given the repo and refspecs, sets fork_point to the point at which the
- * current branch forked from its remote tracking branch. Returns 0 on success,
+ * current branch forked from its remote-tracking branch. Returns 0 on success,
  * -1 on failure.
  */
 static int get_rebase_fork_point(struct object_id *fork_point, const char *repo,
@@ -741,7 +773,7 @@ static int get_rebase_fork_point(struct object_id *fork_point, const char *repo,
        cp.no_stderr = 1;
        cp.git_cmd = 1;
 
-       ret = capture_command(&cp, &sb, GIT_SHA1_HEXSZ);
+       ret = capture_command(&cp, &sb, GIT_MAX_HEXSZ);
        if (ret)
                goto cleanup;
 
@@ -765,10 +797,13 @@ static int get_octopus_merge_base(struct object_id *merge_base,
 {
        struct commit_list *revs = NULL, *result;
 
-       commit_list_insert(lookup_commit_reference(curr_head), &revs);
-       commit_list_insert(lookup_commit_reference(merge_head), &revs);
+       commit_list_insert(lookup_commit_reference(the_repository, curr_head),
+                          &revs);
+       commit_list_insert(lookup_commit_reference(the_repository, merge_head),
+                          &revs);
        if (!is_null_oid(fork_point))
-               commit_list_insert(lookup_commit_reference(fork_point), &revs);
+               commit_list_insert(lookup_commit_reference(the_repository, fork_point),
+                                  &revs);
 
        result = get_octopus_merge_bases(revs);
        free_commit_list(revs);
@@ -783,7 +818,7 @@ static int get_octopus_merge_base(struct object_id *merge_base,
 }
 
 /**
- * Given the current HEAD SHA1, the merge head returned from git-fetch and the
+ * Given the current HEAD oid, the merge head returned from git-fetch and the
  * fork point calculated by get_rebase_fork_point(), runs git-rebase with the
  * appropriate arguments and returns its exit status.
  */
@@ -796,7 +831,7 @@ static int run_rebase(const struct object_id *curr_head,
        struct argv_array args = ARGV_ARRAY_INIT;
 
        if (!get_octopus_merge_base(&oct_merge_base, curr_head, merge_head, fork_point))
-               if (!is_null_oid(fork_point) && !oidcmp(&oct_merge_base, fork_point))
+               if (!is_null_oid(fork_point) && oideq(&oct_merge_base, fork_point))
                        fork_point = NULL;
 
        argv_array_push(&args, "rebase");
@@ -853,6 +888,13 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
 
        argc = parse_options(argc, argv, prefix, pull_options, pull_usage, 0);
 
+       if (cleanup_arg)
+               /*
+                * this only checks the validity of cleanup_arg; we don't need
+                * a valid value for use_editor
+                */
+               get_cleanup_mode(cleanup_arg, 0);
+
        parse_repo_refspecs(argc, argv, &repo, &refspecs);
 
        if (!opt_ff)
@@ -864,7 +906,7 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
        if (read_cache_unmerged())
                die_resolve_conflict("pull");
 
-       if (file_exists(git_path_merge_head()))
+       if (file_exists(git_path_merge_head(the_repository)))
                die_conclude_merge();
 
        if (get_oid("HEAD", &orig_head))
@@ -882,7 +924,8 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
                        die(_("Updating an unborn branch with changes added to the index."));
 
                if (!autostash)
-                       require_clean_work_tree(N_("pull with rebase"),
+                       require_clean_work_tree(the_repository,
+                               N_("pull with rebase"),
                                _("please commit or stash them."), 1, 0);
 
                if (get_rebase_fork_point(&rebase_fork_point, repo, *refspecs))
@@ -899,7 +942,7 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
                oidclr(&curr_head);
 
        if (!is_null_oid(&orig_head) && !is_null_oid(&curr_head) &&
-                       oidcmp(&orig_head, &curr_head)) {
+                       !oideq(&orig_head, &curr_head)) {
                /*
                 * The fetch involved updating the current branch.
                 *
@@ -912,7 +955,8 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
                        "fast-forwarding your working tree from\n"
                        "commit %s."), oid_to_hex(&orig_head));
 
-               if (checkout_fast_forward(&orig_head, &curr_head, 0))
+               if (checkout_fast_forward(the_repository, &orig_head,
+                                         &curr_head, 0))
                        die(_("Cannot fast-forward your working tree.\n"
                                "After making sure that you saved anything precious from\n"
                                "$ git diff %s\n"
@@ -938,15 +982,17 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
                int ret = 0;
                if ((recurse_submodules == RECURSE_SUBMODULES_ON ||
                     recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) &&
-                   submodule_touches_in_range(&rebase_fork_point, &curr_head))
+                   submodule_touches_in_range(the_repository, &rebase_fork_point, &curr_head))
                        die(_("cannot rebase with locally recorded submodule modifications"));
                if (!autostash) {
                        struct commit_list *list = NULL;
                        struct commit *merge_head, *head;
 
-                       head = lookup_commit_reference(&orig_head);
+                       head = lookup_commit_reference(the_repository,
+                                                      &orig_head);
                        commit_list_insert(head, &list);
-                       merge_head = lookup_commit_reference(&merge_heads.oid[0]);
+                       merge_head = lookup_commit_reference(the_repository,
+                                                            &merge_heads.oid[0]);
                        if (is_descendant_of(merge_head, list)) {
                                /* we can fast-forward this without invoking rebase */
                                opt_ff = "--ff-only";