2015-06-14 08:41:51 +00:00
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/*
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* Builtin "git pull"
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*
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* Based on git-pull.sh by Junio C Hamano
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*
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* Fetch one or more remote refs and merge it/them into the current HEAD.
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*/
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#include "cache.h"
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#include "builtin.h"
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#include "parse-options.h"
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#include "exec_cmd.h"
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2015-06-14 08:41:52 +00:00
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#include "run-command.h"
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2015-06-14 08:41:51 +00:00
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static const char * const pull_usage[] = {
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2015-06-14 08:41:52 +00:00
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N_("git pull [options] [<repository> [<refspec>...]]"),
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2015-06-14 08:41:51 +00:00
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NULL
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};
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2015-06-14 08:41:53 +00:00
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/* Shared options */
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static int opt_verbosity;
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static char *opt_progress;
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2015-06-14 08:41:51 +00:00
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static struct option pull_options[] = {
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2015-06-14 08:41:53 +00:00
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/* Shared options */
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OPT__VERBOSITY(&opt_verbosity),
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OPT_PASSTHRU(0, "progress", &opt_progress, NULL,
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N_("force progress reporting"),
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PARSE_OPT_NOARG),
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2015-06-14 08:41:51 +00:00
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OPT_END()
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};
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2015-06-14 08:41:53 +00:00
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/**
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* Pushes "-q" or "-v" switches into arr to match the opt_verbosity level.
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*/
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static void argv_push_verbosity(struct argv_array *arr)
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{
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int verbosity;
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for (verbosity = opt_verbosity; verbosity > 0; verbosity--)
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argv_array_push(arr, "-v");
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for (verbosity = opt_verbosity; verbosity < 0; verbosity++)
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argv_array_push(arr, "-q");
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}
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2015-06-14 08:41:52 +00:00
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/**
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* Parses argv into [<repo> [<refspecs>...]], returning their values in `repo`
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* as a string and `refspecs` as a null-terminated array of strings. If `repo`
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* is not provided in argv, it is set to NULL.
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*/
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static void parse_repo_refspecs(int argc, const char **argv, const char **repo,
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const char ***refspecs)
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{
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if (argc > 0) {
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*repo = *argv++;
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argc--;
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} else
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*repo = NULL;
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*refspecs = argv;
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}
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/**
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* Runs git-fetch, returning its exit status. `repo` and `refspecs` are the
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* repository and refspecs to fetch, or NULL if they are not provided.
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*/
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static int run_fetch(const char *repo, const char **refspecs)
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{
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struct argv_array args = ARGV_ARRAY_INIT;
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int ret;
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argv_array_pushl(&args, "fetch", "--update-head-ok", NULL);
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2015-06-14 08:41:53 +00:00
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/* Shared options */
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argv_push_verbosity(&args);
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if (opt_progress)
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argv_array_push(&args, opt_progress);
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2015-06-14 08:41:52 +00:00
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if (repo) {
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argv_array_push(&args, repo);
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argv_array_pushv(&args, refspecs);
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} else if (*refspecs)
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die("BUG: refspecs without repo?");
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ret = run_command_v_opt(args.argv, RUN_GIT_CMD);
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argv_array_clear(&args);
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return ret;
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}
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/**
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* Runs git-merge, returning its exit status.
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*/
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static int run_merge(void)
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{
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int ret;
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struct argv_array args = ARGV_ARRAY_INIT;
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argv_array_pushl(&args, "merge", NULL);
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2015-06-14 08:41:53 +00:00
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/* Shared options */
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argv_push_verbosity(&args);
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if (opt_progress)
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argv_array_push(&args, opt_progress);
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2015-06-14 08:41:52 +00:00
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argv_array_push(&args, "FETCH_HEAD");
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ret = run_command_v_opt(args.argv, RUN_GIT_CMD);
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argv_array_clear(&args);
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return ret;
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}
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2015-06-14 08:41:51 +00:00
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int cmd_pull(int argc, const char **argv, const char *prefix)
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{
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2015-06-14 08:41:52 +00:00
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const char *repo, **refspecs;
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2015-06-14 08:41:51 +00:00
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if (!getenv("_GIT_USE_BUILTIN_PULL")) {
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const char *path = mkpath("%s/git-pull", git_exec_path());
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if (sane_execvp(path, (char **)argv) < 0)
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die_errno("could not exec %s", path);
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}
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argc = parse_options(argc, argv, prefix, pull_options, pull_usage, 0);
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2015-06-14 08:41:52 +00:00
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parse_repo_refspecs(argc, argv, &repo, &refspecs);
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if (run_fetch(repo, refspecs))
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return 1;
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return run_merge();
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2015-06-14 08:41:51 +00:00
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}
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