#include "parse-options.h"
#include "exec_cmd.h"
#include "run-command.h"
+#include "sha1-array.h"
+#include "remote.h"
+#include "dir.h"
static const char * const pull_usage[] = {
N_("git pull [options] [<repository> [<refspec>...]]"),
NULL
};
+/* Shared options */
+static int opt_verbosity;
+static char *opt_progress;
+
+/* Options passed to git-merge */
+static char *opt_diffstat;
+static char *opt_log;
+static char *opt_squash;
+static char *opt_commit;
+static char *opt_edit;
+static char *opt_ff;
+static char *opt_verify_signatures;
+static struct argv_array opt_strategies = ARGV_ARRAY_INIT;
+static struct argv_array opt_strategy_opts = ARGV_ARRAY_INIT;
+static char *opt_gpg_sign;
+
+/* Options passed to git-fetch */
+static char *opt_all;
+static char *opt_append;
+static char *opt_upload_pack;
+static int opt_force;
+static char *opt_tags;
+static char *opt_prune;
+static char *opt_recurse_submodules;
+static int opt_dry_run;
+static char *opt_keep;
+static char *opt_depth;
+static char *opt_unshallow;
+static char *opt_update_shallow;
+static char *opt_refmap;
+
static struct option pull_options[] = {
+ /* Shared options */
+ OPT__VERBOSITY(&opt_verbosity),
+ OPT_PASSTHRU(0, "progress", &opt_progress, NULL,
+ N_("force progress reporting"),
+ PARSE_OPT_NOARG),
+
+ /* Options passed to git-merge */
+ OPT_GROUP(N_("Options related to merging")),
+ OPT_PASSTHRU('n', NULL, &opt_diffstat, NULL,
+ N_("do not show a diffstat at the end of the merge"),
+ PARSE_OPT_NOARG | PARSE_OPT_NONEG),
+ OPT_PASSTHRU(0, "stat", &opt_diffstat, NULL,
+ N_("show a diffstat at the end of the merge"),
+ PARSE_OPT_NOARG),
+ OPT_PASSTHRU(0, "summary", &opt_diffstat, NULL,
+ N_("(synonym to --stat)"),
+ PARSE_OPT_NOARG | PARSE_OPT_HIDDEN),
+ OPT_PASSTHRU(0, "log", &opt_log, N_("n"),
+ N_("add (at most <n>) entries from shortlog to merge commit message"),
+ PARSE_OPT_OPTARG),
+ OPT_PASSTHRU(0, "squash", &opt_squash, NULL,
+ N_("create a single commit instead of doing a merge"),
+ PARSE_OPT_NOARG),
+ OPT_PASSTHRU(0, "commit", &opt_commit, NULL,
+ N_("perform a commit if the merge succeeds (default)"),
+ PARSE_OPT_NOARG),
+ OPT_PASSTHRU(0, "edit", &opt_edit, NULL,
+ N_("edit message before committing"),
+ PARSE_OPT_NOARG),
+ OPT_PASSTHRU(0, "ff", &opt_ff, NULL,
+ N_("allow fast-forward"),
+ PARSE_OPT_NOARG),
+ OPT_PASSTHRU(0, "ff-only", &opt_ff, NULL,
+ N_("abort if fast-forward is not possible"),
+ PARSE_OPT_NOARG | PARSE_OPT_NONEG),
+ OPT_PASSTHRU(0, "verify-signatures", &opt_verify_signatures, NULL,
+ N_("verify that the named commit has a valid GPG signature"),
+ PARSE_OPT_NOARG),
+ OPT_PASSTHRU_ARGV('s', "strategy", &opt_strategies, N_("strategy"),
+ N_("merge strategy to use"),
+ 0),
+ OPT_PASSTHRU_ARGV('X', "strategy-option", &opt_strategy_opts,
+ N_("option=value"),
+ N_("option for selected merge strategy"),
+ 0),
+ OPT_PASSTHRU('S', "gpg-sign", &opt_gpg_sign, N_("key-id"),
+ N_("GPG sign commit"),
+ PARSE_OPT_OPTARG),
+
+ /* Options passed to git-fetch */
+ OPT_GROUP(N_("Options related to fetching")),
+ OPT_PASSTHRU(0, "all", &opt_all, NULL,
+ N_("fetch from all remotes"),
+ PARSE_OPT_NOARG),
+ OPT_PASSTHRU('a', "append", &opt_append, NULL,
+ N_("append to .git/FETCH_HEAD instead of overwriting"),
+ PARSE_OPT_NOARG),
+ OPT_PASSTHRU(0, "upload-pack", &opt_upload_pack, N_("path"),
+ N_("path to upload pack on remote end"),
+ 0),
+ OPT__FORCE(&opt_force, N_("force overwrite of local branch")),
+ OPT_PASSTHRU('t', "tags", &opt_tags, NULL,
+ N_("fetch all tags and associated objects"),
+ PARSE_OPT_NOARG),
+ OPT_PASSTHRU('p', "prune", &opt_prune, NULL,
+ N_("prune remote-tracking branches no longer on remote"),
+ PARSE_OPT_NOARG),
+ OPT_PASSTHRU(0, "recurse-submodules", &opt_recurse_submodules,
+ N_("on-demand"),
+ N_("control recursive fetching of submodules"),
+ PARSE_OPT_OPTARG),
+ OPT_BOOL(0, "dry-run", &opt_dry_run,
+ N_("dry run")),
+ OPT_PASSTHRU('k', "keep", &opt_keep, NULL,
+ N_("keep downloaded pack"),
+ PARSE_OPT_NOARG),
+ OPT_PASSTHRU(0, "depth", &opt_depth, N_("depth"),
+ N_("deepen history of shallow clone"),
+ 0),
+ OPT_PASSTHRU(0, "unshallow", &opt_unshallow, NULL,
+ N_("convert to a complete repository"),
+ PARSE_OPT_NONEG | PARSE_OPT_NOARG),
+ OPT_PASSTHRU(0, "update-shallow", &opt_update_shallow, NULL,
+ N_("accept refs that update .git/shallow"),
+ PARSE_OPT_NOARG),
+ OPT_PASSTHRU(0, "refmap", &opt_refmap, N_("refmap"),
+ N_("specify fetch refmap"),
+ PARSE_OPT_NONEG),
+
OPT_END()
};
+/**
+ * Pushes "-q" or "-v" switches into arr to match the opt_verbosity level.
+ */
+static void argv_push_verbosity(struct argv_array *arr)
+{
+ int verbosity;
+
+ for (verbosity = opt_verbosity; verbosity > 0; verbosity--)
+ argv_array_push(arr, "-v");
+
+ for (verbosity = opt_verbosity; verbosity < 0; verbosity++)
+ argv_array_push(arr, "-q");
+}
+
+/**
+ * Pushes "-f" switches into arr to match the opt_force level.
+ */
+static void argv_push_force(struct argv_array *arr)
+{
+ int force = opt_force;
+ while (force-- > 0)
+ argv_array_push(arr, "-f");
+}
+
+/**
+ * If pull.ff is unset, returns NULL. If pull.ff is "true", returns "--ff". If
+ * pull.ff is "false", returns "--no-ff". If pull.ff is "only", returns
+ * "--ff-only". Otherwise, if pull.ff is set to an invalid value, die with an
+ * error.
+ */
+static const char *config_get_ff(void)
+{
+ const char *value;
+
+ if (git_config_get_value("pull.ff", &value))
+ return NULL;
+
+ switch (git_config_maybe_bool("pull.ff", value)) {
+ case 0:
+ return "--no-ff";
+ case 1:
+ return "--ff";
+ }
+
+ if (!strcmp(value, "only"))
+ return "--ff-only";
+
+ die(_("Invalid value for pull.ff: %s"), value);
+}
+
+/**
+ * Appends merge candidates from FETCH_HEAD that are not marked not-for-merge
+ * into merge_heads.
+ */
+static void get_merge_heads(struct sha1_array *merge_heads)
+{
+ const char *filename = git_path("FETCH_HEAD");
+ FILE *fp;
+ struct strbuf sb = STRBUF_INIT;
+ unsigned char sha1[GIT_SHA1_RAWSZ];
+
+ if (!(fp = fopen(filename, "r")))
+ die_errno(_("could not open '%s' for reading"), filename);
+ while (strbuf_getline(&sb, fp, '\n') != EOF) {
+ if (get_sha1_hex(sb.buf, sha1))
+ continue; /* invalid line: does not start with SHA1 */
+ if (starts_with(sb.buf + GIT_SHA1_HEXSZ, "\tnot-for-merge\t"))
+ continue; /* ref is not-for-merge */
+ sha1_array_append(merge_heads, sha1);
+ }
+ fclose(fp);
+ strbuf_release(&sb);
+}
+
+/**
+ * Used by die_no_merge_candidates() as a for_each_remote() callback to
+ * retrieve the name of the remote if the repository only has one remote.
+ */
+static int get_only_remote(struct remote *remote, void *cb_data)
+{
+ const char **remote_name = cb_data;
+
+ if (*remote_name)
+ return -1;
+
+ *remote_name = remote->name;
+ return 0;
+}
+
+/**
+ * Dies with the appropriate reason for why there are no merge candidates:
+ *
+ * 1. We fetched from a specific remote, and a refspec was given, but it ended
+ * up not fetching anything. This is usually because the user provided a
+ * wildcard refspec which had no matches on the remote end.
+ *
+ * 2. We fetched from a non-default remote, but didn't specify a branch to
+ * merge. We can't use the configured one because it applies to the default
+ * remote, thus the user must specify the branches to merge.
+ *
+ * 3. We fetched from the branch's or repo's default remote, but:
+ *
+ * a. We are not on a branch, so there will never be a configured branch to
+ * merge with.
+ *
+ * b. We are on a branch, but there is no configured branch to merge with.
+ *
+ * 4. We fetched from the branch's or repo's default remote, but the configured
+ * branch to merge didn't get fetched. (Either it doesn't exist, or wasn't
+ * part of the configured fetch refspec.)
+ */
+static void NORETURN die_no_merge_candidates(const char *repo, const char **refspecs)
+{
+ struct branch *curr_branch = branch_get("HEAD");
+ const char *remote = curr_branch ? curr_branch->remote_name : NULL;
+
+ if (*refspecs) {
+ fprintf_ln(stderr, _("There are no candidates for merging among the refs that you just fetched."));
+ fprintf_ln(stderr, _("Generally this means that you provided a wildcard refspec which had no\n"
+ "matches on the remote end."));
+ } else if (repo && curr_branch && (!remote || strcmp(repo, remote))) {
+ fprintf_ln(stderr, _("You asked to pull from the remote '%s', but did not specify\n"
+ "a branch. Because this is not the default configured remote\n"
+ "for your current branch, you must specify a branch on the command line."),
+ repo);
+ } else if (!curr_branch) {
+ fprintf_ln(stderr, _("You are not currently on a branch."));
+ fprintf_ln(stderr, _("Please specify which branch you want to merge with."));
+ fprintf_ln(stderr, _("See git-pull(1) for details."));
+ fprintf(stderr, "\n");
+ fprintf_ln(stderr, " git pull <remote> <branch>");
+ fprintf(stderr, "\n");
+ } else if (!curr_branch->merge_nr) {
+ const char *remote_name = NULL;
+
+ if (for_each_remote(get_only_remote, &remote_name) || !remote_name)
+ remote_name = "<remote>";
+
+ fprintf_ln(stderr, _("There is no tracking information for the current branch."));
+ fprintf_ln(stderr, _("Please specify which branch you want to merge with."));
+ fprintf_ln(stderr, _("See git-pull(1) for details."));
+ fprintf(stderr, "\n");
+ fprintf_ln(stderr, " git pull <remote> <branch>");
+ fprintf(stderr, "\n");
+ fprintf_ln(stderr, _("If you wish to set tracking information for this branch you can do so with:\n"
+ "\n"
+ " git branch --set-upstream-to=%s/<branch> %s\n"),
+ remote_name, curr_branch->name);
+ } else
+ fprintf_ln(stderr, _("Your configuration specifies to merge with the ref '%s'\n"
+ "from the remote, but no such ref was fetched."),
+ *curr_branch->merge_name);
+ exit(1);
+}
+
/**
* Parses argv into [<repo> [<refspecs>...]], returning their values in `repo`
* as a string and `refspecs` as a null-terminated array of strings. If `repo`
int ret;
argv_array_pushl(&args, "fetch", "--update-head-ok", NULL);
+
+ /* Shared options */
+ argv_push_verbosity(&args);
+ if (opt_progress)
+ argv_array_push(&args, opt_progress);
+
+ /* Options passed to git-fetch */
+ if (opt_all)
+ argv_array_push(&args, opt_all);
+ if (opt_append)
+ argv_array_push(&args, opt_append);
+ if (opt_upload_pack)
+ argv_array_push(&args, opt_upload_pack);
+ argv_push_force(&args);
+ if (opt_tags)
+ argv_array_push(&args, opt_tags);
+ if (opt_prune)
+ argv_array_push(&args, opt_prune);
+ if (opt_recurse_submodules)
+ argv_array_push(&args, opt_recurse_submodules);
+ if (opt_dry_run)
+ argv_array_push(&args, "--dry-run");
+ if (opt_keep)
+ argv_array_push(&args, opt_keep);
+ if (opt_depth)
+ argv_array_push(&args, opt_depth);
+ if (opt_unshallow)
+ argv_array_push(&args, opt_unshallow);
+ if (opt_update_shallow)
+ argv_array_push(&args, opt_update_shallow);
+ if (opt_refmap)
+ argv_array_push(&args, opt_refmap);
+
if (repo) {
argv_array_push(&args, repo);
argv_array_pushv(&args, refspecs);
struct argv_array args = ARGV_ARRAY_INIT;
argv_array_pushl(&args, "merge", NULL);
+
+ /* Shared options */
+ argv_push_verbosity(&args);
+ if (opt_progress)
+ argv_array_push(&args, opt_progress);
+
+ /* Options passed to git-merge */
+ if (opt_diffstat)
+ argv_array_push(&args, opt_diffstat);
+ if (opt_log)
+ argv_array_push(&args, opt_log);
+ if (opt_squash)
+ argv_array_push(&args, opt_squash);
+ if (opt_commit)
+ argv_array_push(&args, opt_commit);
+ if (opt_edit)
+ argv_array_push(&args, opt_edit);
+ if (opt_ff)
+ argv_array_push(&args, opt_ff);
+ if (opt_verify_signatures)
+ argv_array_push(&args, opt_verify_signatures);
+ argv_array_pushv(&args, opt_strategies.argv);
+ argv_array_pushv(&args, opt_strategy_opts.argv);
+ if (opt_gpg_sign)
+ argv_array_push(&args, opt_gpg_sign);
+
argv_array_push(&args, "FETCH_HEAD");
ret = run_command_v_opt(args.argv, RUN_GIT_CMD);
argv_array_clear(&args);
int cmd_pull(int argc, const char **argv, const char *prefix)
{
const char *repo, **refspecs;
+ struct sha1_array merge_heads = SHA1_ARRAY_INIT;
if (!getenv("_GIT_USE_BUILTIN_PULL")) {
const char *path = mkpath("%s/git-pull", git_exec_path());
parse_repo_refspecs(argc, argv, &repo, &refspecs);
+ if (!opt_ff)
+ opt_ff = xstrdup_or_null(config_get_ff());
+
+ git_config(git_default_config, NULL);
+
+ if (read_cache_unmerged())
+ die_resolve_conflict("Pull");
+
+ if (file_exists(git_path("MERGE_HEAD")))
+ die_conclude_merge();
+
if (run_fetch(repo, refspecs))
return 1;
+ if (opt_dry_run)
+ return 0;
+
+ get_merge_heads(&merge_heads);
+
+ if (!merge_heads.nr)
+ die_no_merge_candidates(repo, refspecs);
+
return run_merge();
}