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[2a01:4f8:120:2468::2]) by smtp.gmail.com with ESMTPSA id g8sm10154691ejt.26.2022.01.28.04.56.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Jan 2022 04:56:46 -0800 (PST) From: =?UTF-8?q?=C3=86var=20Arnfj=C3=B6r=C3=B0=20Bjarmason?= To: git@vger.kernel.org Cc: Junio C Hamano , Atharva Raykar , Christian Couder , Emily Shaffer , Jonathan Nieder , Kaartic Sivaraam , pc44800@gmail.com, Shourya Shukla , Glen Choo , =?UTF-8?q?=C3=86var=20Arnfj=C3=B6r=C3=B0=20Bjarmason?= Subject: [PATCH v5 0/9] submodule: convert the rest of 'update' to C Date: Fri, 28 Jan 2022 13:56:31 +0100 Message-Id: X-Mailer: git-send-email 2.35.0.914.ge5c8aab0d5b In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org A rewrite of "git submodule" in C, except the trivial pass-through wrapping code (basically getopt etc.) in git-submodule.sh. For a greater summary & context see v4's CL: https://lore.kernel.org/git/cover-v4-0.7-00000000000-20220127T143552Z-avarab@gmail.com/ Changes in v5: * Took Glen Choo's suggestion for a code change in 1/8, thanks! * A bit more mid-series churn to make the large commit at the end have a smaller diff. The result is that in v4/v5 we have in that last commit (but see below). - 2 files changed, 389 insertions(+), 418 deletions(-) + 2 files changed, 357 insertions(+), 388 deletions(-) * There were some logic errors in v4 around how we handled error reporting. A new 8/9 adds tests for the existing behavior, and we're now bug-for-bug compatible. It turned out that we were passing around string lists of errors etc. in a way that wasn't needed, i.e. the initial code can just report the error. Much of this was also simplified with my recently added die_message() function. I.e. sometimes we want to have a "fatal: " message, but exit non-128. Atharva Raykar (6): submodule--helper: get remote names from any repository submodule--helper: refactor get_submodule_displaypath() submodule--helper: allow setting superprefix for init_submodule() submodule--helper: run update using child process struct builtin/submodule--helper.c: reformat designated initializers submodule: move core cmd_update() logic to C Ævar Arnfjörð Bjarmason (3): builtin/submodule--helper.c: rename option variables to "opt" submodule--helper: don't use bitfield indirection for parse_options() submodule tests: test for init and update failure output builtin/submodule--helper.c | 706 +++++++++++++++++++-------------- git-submodule.sh | 145 +------ t/t7406-submodule-update.sh | 14 +- t/t7408-submodule-reference.sh | 14 +- 4 files changed, 444 insertions(+), 435 deletions(-) Range-diff against v4: 1: 1a0b1323cd7 ! 1: 088c7236a16 submodule--helper: get remote names from any repository @@ Commit message Mentored-by: Christian Couder Mentored-by: Shourya Shukla + Helped-by: Glen Choo Signed-off-by: Atharva Raykar Signed-off-by: Junio C Hamano Signed-off-by: Ævar Arnfjörð Bjarmason @@ builtin/submodule--helper.c void *cb_data); -static char *get_default_remote(void) -+static char *repo_get_default_remote(struct repository *repo, const char *refname) ++static char *repo_get_default_remote(struct repository *repo) { char *dest = NULL, *ret; struct strbuf sb = STRBUF_INIT; - const char *refname = resolve_ref_unsafe("HEAD", 0, NULL, NULL); ++ struct ref_store *store = get_main_ref_store(repo); ++ int ignore_errno; ++ const char *refname = refs_resolve_ref_unsafe(store, "HEAD", 0, NULL, ++ NULL, &ignore_errno); if (!refname) die(_("No such ref: %s"), "HEAD"); @@ builtin/submodule--helper.c: static char *get_default_remote(void) +static char *get_default_remote_submodule(const char *module_path) +{ -+ const char *refname; + struct repository subrepo; -+ int ignore_errno; + -+ refname = refs_resolve_ref_unsafe(get_submodule_ref_store(module_path), -+ "HEAD", 0, NULL, NULL, -+ &ignore_errno); + repo_submodule_init(&subrepo, the_repository, module_path, null_oid()); -+ return repo_get_default_remote(&subrepo, refname); ++ return repo_get_default_remote(&subrepo); +} + +static char *get_default_remote(void) +{ -+ const char *refname = resolve_ref_unsafe("HEAD", 0, NULL, NULL); -+ return repo_get_default_remote(the_repository, refname); ++ return repo_get_default_remote(the_repository); +} + static int print_default_remote(int argc, const char **argv, const char *prefix) 2: 7e2df3ff220 = 2: bc694987893 submodule--helper: refactor get_submodule_displaypath() 3: f31fd72fba2 = 3: e2cc7f0e23b submodule--helper: allow setting superprefix for init_submodule() 4: 76c5a826a80 = 4: e1df2dd4457 submodule--helper: run update using child process struct 5: 29aa2fc0851 = 5: fa815e37f9f builtin/submodule--helper.c: reformat designated initializers 6: d3ad6e7a351 ! 6: ef097f7ea51 builtin/submodule--helper.c: rename "suc" variable to "opt" @@ Metadata Author: Ævar Arnfjörð Bjarmason ## Commit message ## - builtin/submodule--helper.c: rename "suc" variable to "opt" + builtin/submodule--helper.c: rename option variables to "opt" - Rename the "suc" variable in "builtin/submodule--helper.c" to - "opt". The only reason for this change is to make the subsequent - commit's diff smaller, by doing this rename we can "anchor" the diff - better, as it "borrow" most of the options declared here as-is as far - as the diff rename detection is concerned. + Rename the "suc" variable in update_clone() to "opt", and do the same + for the "update_data" variable in run_update_procedure(). + + The only reason for this change is to make the subsequent commit's + diff smaller, by doing this rename we can "anchor" the diff better, as + it "borrow" most of the options declared here as-is as far as the diff + rename detection is concerned. Signed-off-by: Ævar Arnfjörð Bjarmason @@ builtin/submodule--helper.c: static int update_clone(int argc, const char **argv } static int run_update_procedure(int argc, const char **argv, const char *prefix) + { + int force = 0, quiet = 0, nofetch = 0, just_cloned = 0; + char *prefixed_path, *update = NULL; +- struct update_data update_data = UPDATE_DATA_INIT; ++ struct update_data opt = UPDATE_DATA_INIT; + + struct option options[] = { + OPT__QUIET(&quiet, N_("suppress output for update by rebase or merge")), +@@ builtin/submodule--helper.c: static int run_update_procedure(int argc, const char **argv, const char *prefix) + N_("don't fetch new objects from the remote site")), + OPT_BOOL(0, "just-cloned", &just_cloned, + N_("overrides update mode in case the repository is a fresh clone")), +- OPT_INTEGER(0, "depth", &update_data.depth, N_("depth for shallow fetch")), ++ OPT_INTEGER(0, "depth", &opt.depth, N_("depth for shallow fetch")), + OPT_STRING(0, "prefix", &prefix, + N_("path"), + N_("path into the working tree")), + OPT_STRING(0, "update", &update, + N_("string"), + N_("rebase, merge, checkout or none")), +- OPT_STRING(0, "recursive-prefix", &update_data.recursive_prefix, N_("path"), ++ OPT_STRING(0, "recursive-prefix", &opt.recursive_prefix, N_("path"), + N_("path into the working tree, across nested " + "submodule boundaries")), +- OPT_CALLBACK_F(0, "oid", &update_data.oid, N_("sha1"), ++ OPT_CALLBACK_F(0, "oid", &opt.oid, N_("sha1"), + N_("SHA1 expected by superproject"), PARSE_OPT_NONEG, + parse_opt_object_id), +- OPT_CALLBACK_F(0, "suboid", &update_data.suboid, N_("subsha1"), ++ OPT_CALLBACK_F(0, "suboid", &opt.suboid, N_("subsha1"), + N_("SHA1 of submodule's HEAD"), PARSE_OPT_NONEG, + parse_opt_object_id), + OPT_END() +@@ builtin/submodule--helper.c: static int run_update_procedure(int argc, const char **argv, const char *prefix) + if (argc != 1) + usage_with_options(usage, options); + +- update_data.force = !!force; +- update_data.quiet = !!quiet; +- update_data.nofetch = !!nofetch; +- update_data.just_cloned = !!just_cloned; +- update_data.sm_path = argv[0]; ++ opt.force = !!force; ++ opt.quiet = !!quiet; ++ opt.nofetch = !!nofetch; ++ opt.just_cloned = !!just_cloned; ++ opt.sm_path = argv[0]; + +- if (update_data.recursive_prefix) +- prefixed_path = xstrfmt("%s%s", update_data.recursive_prefix, update_data.sm_path); ++ if (opt.recursive_prefix) ++ prefixed_path = xstrfmt("%s%s", opt.recursive_prefix, opt.sm_path); + else +- prefixed_path = xstrdup(update_data.sm_path); ++ prefixed_path = xstrdup(opt.sm_path); + +- update_data.displaypath = get_submodule_displaypath(prefixed_path, prefix); ++ opt.displaypath = get_submodule_displaypath(prefixed_path, prefix); + +- determine_submodule_update_strategy(the_repository, update_data.just_cloned, +- update_data.sm_path, update, +- &update_data.update_strategy); ++ determine_submodule_update_strategy(the_repository, opt.just_cloned, ++ opt.sm_path, update, ++ &opt.update_strategy); + + free(prefixed_path); + +- if (!oideq(&update_data.oid, &update_data.suboid) || update_data.force) +- return do_run_update_procedure(&update_data); ++ if (!oideq(&opt.oid, &opt.suboid) || opt.force) ++ return do_run_update_procedure(&opt); + + return 3; + } -: ----------- > 7: 6b038f558c1 submodule--helper: don't use bitfield indirection for parse_options() -: ----------- > 8: b4f84132201 submodule tests: test for init and update failure output 7: 02954603763 ! 9: e8e57606ee9 submodule: move core cmd_update() logic to C @@ Commit message ## builtin/submodule--helper.c ## @@ builtin/submodule--helper.c: static char *get_default_remote(void) - return repo_get_default_remote(the_repository, refname); + return repo_get_default_remote(the_repository); } -static int print_default_remote(int argc, const char **argv, const char *prefix) @@ builtin/submodule--helper.c: struct submodule_update_clone { const char *recursive_prefix; const char *sm_path; const char *displaypath; - struct object_id oid; +@@ builtin/submodule--helper.c: struct update_data { struct object_id suboid; struct submodule_update_strategy update_strategy; -+ int max_jobs; int depth; -- unsigned int force: 1; -- unsigned int quiet: 1; -- unsigned int nofetch: 1; -- unsigned int just_cloned: 1; + int recommend_shallow; + int single_branch; ++ int max_jobs; + unsigned int init; -+ unsigned int force; -+ unsigned int quiet; -+ unsigned int nofetch; + unsigned int force; + unsigned int quiet; + unsigned int nofetch; + unsigned int just_cloned; + unsigned int remote; + unsigned int recursive; + unsigned int progress; + unsigned int dissociate; + unsigned int require_init; + unsigned warn_if_uninitialized ; -+ unsigned int just_cloned ; + struct string_list references; + struct module_list list; }; @@ builtin/submodule--helper.c: struct submodule_update_clone { } static void next_submodule_warn_missing(struct submodule_update_clone *suc, -@@ builtin/submodule--helper.c: static int fetch_in_submodule(const char *module_path, int depth, int quiet, str - return run_command(&cp); - } - --static int run_update_command(struct update_data *ud, int subforce) -+static int run_update_command(struct update_data *ud, int subforce, struct string_list *err) - { +@@ builtin/submodule--helper.c: static int run_update_command(struct update_data *ud, int subforce) struct child_process cp = CHILD_PROCESS_INIT; char *oid = oid_to_hex(&ud->oid); -+ struct strbuf out = STRBUF_INIT; int must_die_on_failure = 0; + struct submodule_update_strategy strategy = SUBMODULE_UPDATE_STRATEGY_INIT; @@ builtin/submodule--helper.c: static int run_update_command(struct update_data *u cp.dir = xstrdup(ud->sm_path); prepare_submodule_repo_env(&cp.env_array); -- if (run_command(&cp)) { + if (run_command(&cp)) { - switch (ud->update_strategy.type) { -+ if (capture_command(&cp, &out, 0)) { -+ if (must_die_on_failure) { -+ switch (strategy.type) { -+ case SM_UPDATE_CHECKOUT: -+ die(_("Unable to checkout '%s' in submodule path '%s'"), -+ oid, ud->displaypath); -+ break; -+ case SM_UPDATE_REBASE: -+ die(_("Unable to rebase '%s' in submodule path '%s'"), -+ oid, ud->displaypath); -+ break; -+ case SM_UPDATE_MERGE: -+ die(_("Unable to merge '%s' in submodule path '%s'"), -+ oid, ud->displaypath); -+ break; -+ case SM_UPDATE_COMMAND: -+ die(_("Execution of '%s %s' failed in submodule path '%s'"), -+ strategy.command, oid, ud->displaypath); -+ break; -+ default: -+ BUG("unexpected update strategy type: %s", -+ submodule_strategy_to_string(&strategy)); -+ } -+ } -+ -+ /* the command failed, but update must continue */ -+ string_list_append_nodup(err, strbuf_detach(&out, NULL)); -+ return 1; -+ } -+ -+ if (!ud->quiet) { + switch (strategy.type) { case SM_UPDATE_CHECKOUT: - printf(_("Unable to checkout '%s' in submodule path '%s'"), - oid, ud->displaypath); -+ printf(_("Submodule path '%s': checked out '%s'\n"), -+ ud->displaypath, oid); ++ die_message(_("Unable to checkout '%s' in submodule path '%s'"), ++ oid, ud->displaypath); break; case SM_UPDATE_REBASE: - printf(_("Unable to rebase '%s' in submodule path '%s'"), - oid, ud->displaypath); -+ printf(_("Submodule path '%s': rebased into '%s'\n"), -+ ud->displaypath, oid); ++ if (!must_die_on_failure) ++ break; ++ die(_("Unable to rebase '%s' in submodule path '%s'"), ++ oid, ud->displaypath); break; case SM_UPDATE_MERGE: - printf(_("Unable to merge '%s' in submodule path '%s'"), - oid, ud->displaypath); -+ printf(_("Submodule path '%s': merged in '%s'\n"), -+ ud->displaypath, oid); ++ if (!must_die_on_failure) ++ break; ++ die(_("Unable to merge '%s' in submodule path '%s'"), ++ oid, ud->displaypath); break; case SM_UPDATE_COMMAND: - printf(_("Execution of '%s %s' failed in submodule path '%s'"), - ud->update_strategy.command, oid, ud->displaypath); -+ printf(_("Submodule path '%s': '%s %s'\n"), -+ ud->displaypath, strategy.command, oid); ++ if (!must_die_on_failure) ++ break; ++ die(_("Execution of '%s %s' failed in submodule path '%s'"), ++ strategy.command, oid, ud->displaypath); break; default: BUG("unexpected update strategy type: %s", @@ builtin/submodule--helper.c: static int run_update_command(struct update_data *u - * This signifies to the caller in shell that the command - * failed without dying - */ -- return 1; -- } -- ++ ++ /* the command failed, but update must continue */ + return 1; + } + - switch (ud->update_strategy.type) { -- case SM_UPDATE_CHECKOUT: -- printf(_("Submodule path '%s': checked out '%s'\n"), -- ud->displaypath, oid); -- break; -- case SM_UPDATE_REBASE: -- printf(_("Submodule path '%s': rebased into '%s'\n"), -- ud->displaypath, oid); -- break; -- case SM_UPDATE_MERGE: -- printf(_("Submodule path '%s': merged in '%s'\n"), -- ud->displaypath, oid); -- break; -- case SM_UPDATE_COMMAND: -- printf(_("Submodule path '%s': '%s %s'\n"), ++ if (ud->quiet) ++ return 0; ++ ++ switch (strategy.type) { + case SM_UPDATE_CHECKOUT: + printf(_("Submodule path '%s': checked out '%s'\n"), + ud->displaypath, oid); +@@ builtin/submodule--helper.c: static int run_update_command(struct update_data *ud, int subforce) + break; + case SM_UPDATE_COMMAND: + printf(_("Submodule path '%s': '%s %s'\n"), - ud->displaypath, ud->update_strategy.command, oid); -- break; -- default: -- BUG("unexpected update strategy type: %s", ++ ud->displaypath, strategy.command, oid); + break; + default: + BUG("unexpected update strategy type: %s", - submodule_strategy_to_string(&ud->update_strategy)); ++ submodule_strategy_to_string(&strategy)); } -+ strbuf_release(&out); return 0; } -static int do_run_update_procedure(struct update_data *ud) -+static int run_update_procedure(struct update_data *ud, struct string_list *err) ++static int run_update_procedure(struct update_data *ud) { int subforce = is_null_oid(&ud->suboid) || ud->force; @@ builtin/submodule--helper.c: static int do_run_update_procedure(struct update_data *ud) - ud->displaypath, oid_to_hex(&ud->oid)); - } + return run_update_command(ud, subforce); + } -- return run_update_command(ud, subforce); --} -- -static void update_submodule(struct update_clone_data *ucd) -{ - fprintf(stdout, "dummy %s %d\t%s\n", @@ builtin/submodule--helper.c: static int do_run_update_procedure(struct update_da - -static int run_update_procedure(int argc, const char **argv, const char *prefix) -{ -- int force = 0, quiet = 0, nofetch = 0, just_cloned = 0; - char *prefixed_path, *update = NULL; -- struct update_data update_data = UPDATE_DATA_INIT; +- struct update_data opt = UPDATE_DATA_INIT; - - struct option options[] = { -- OPT__QUIET(&quiet, N_("suppress output for update by rebase or merge")), -- OPT__FORCE(&force, N_("force checkout updates"), 0), -- OPT_BOOL('N', "no-fetch", &nofetch, +- OPT__QUIET(&opt.quiet, +- N_("suppress output for update by rebase or merge")), +- OPT__FORCE(&opt.force, N_("force checkout updates"), +- 0), +- OPT_BOOL('N', "no-fetch", &opt.nofetch, - N_("don't fetch new objects from the remote site")), -- OPT_BOOL(0, "just-cloned", &just_cloned, +- OPT_BOOL(0, "just-cloned", &opt.just_cloned, - N_("overrides update mode in case the repository is a fresh clone")), -- OPT_INTEGER(0, "depth", &update_data.depth, N_("depth for shallow fetch")), +- OPT_INTEGER(0, "depth", &opt.depth, N_("depth for shallow fetch")), - OPT_STRING(0, "prefix", &prefix, - N_("path"), - N_("path into the working tree")), - OPT_STRING(0, "update", &update, - N_("string"), - N_("rebase, merge, checkout or none")), -- OPT_STRING(0, "recursive-prefix", &update_data.recursive_prefix, N_("path"), +- OPT_STRING(0, "recursive-prefix", &opt.recursive_prefix, N_("path"), - N_("path into the working tree, across nested " - "submodule boundaries")), -- OPT_CALLBACK_F(0, "oid", &update_data.oid, N_("sha1"), +- OPT_CALLBACK_F(0, "oid", &opt.oid, N_("sha1"), - N_("SHA1 expected by superproject"), PARSE_OPT_NONEG, - parse_opt_object_id), -- OPT_CALLBACK_F(0, "suboid", &update_data.suboid, N_("subsha1"), +- OPT_CALLBACK_F(0, "suboid", &opt.suboid, N_("subsha1"), - N_("SHA1 of submodule's HEAD"), PARSE_OPT_NONEG, - parse_opt_object_id), - OPT_END() @@ builtin/submodule--helper.c: static int do_run_update_procedure(struct update_da - if (argc != 1) - usage_with_options(usage, options); - -- update_data.force = !!force; -- update_data.quiet = !!quiet; -- update_data.nofetch = !!nofetch; -- update_data.just_cloned = !!just_cloned; -- update_data.sm_path = argv[0]; +- opt.sm_path = argv[0]; - -- if (update_data.recursive_prefix) -- prefixed_path = xstrfmt("%s%s", update_data.recursive_prefix, update_data.sm_path); +- if (opt.recursive_prefix) +- prefixed_path = xstrfmt("%s%s", opt.recursive_prefix, opt.sm_path); - else -- prefixed_path = xstrdup(update_data.sm_path); +- prefixed_path = xstrdup(opt.sm_path); - -- update_data.displaypath = get_submodule_displaypath(prefixed_path, prefix); +- opt.displaypath = get_submodule_displaypath(prefixed_path, prefix); - -- determine_submodule_update_strategy(the_repository, update_data.just_cloned, -- update_data.sm_path, update, -- &update_data.update_strategy); +- determine_submodule_update_strategy(the_repository, opt.just_cloned, +- opt.sm_path, update, +- &opt.update_strategy); - - free(prefixed_path); - -- if (!oideq(&update_data.oid, &update_data.suboid) || update_data.force) -- return do_run_update_procedure(&update_data); +- if (!oideq(&opt.oid, &opt.suboid) || opt.force) +- return do_run_update_procedure(&opt); - - return 3; -} @@ builtin/submodule--helper.c: static int do_run_update_procedure(struct update_da - printf("%s", relative_path(argv[1], argv[2], &sb)); - strbuf_release(&sb); - return 0; -+ return run_update_command(ud, subforce, err); - } - +-} +- static const char *remote_submodule_branch(const char *path) + { + const struct submodule *sub; @@ builtin/submodule--helper.c: static int push_check(int argc, const char **argv, const char *prefix) return 0; } @@ builtin/submodule--helper.c: static int module_set_branch(int argc, const char * +static int update_submodule(struct update_data *update_data) +{ + char *prefixed_path; -+ struct string_list err = STRING_LIST_INIT_DUP; + + ensure_core_worktree(update_data->sm_path); + @@ builtin/submodule--helper.c: static int module_set_branch(int argc, const char * + } + + if (!oideq(&update_data->oid, &update_data->suboid) || update_data->force) -+ if (run_update_procedure(update_data, &err)) ++ if (run_update_procedure(update_data)) + return 1; + + if (update_data->recursive) { -+ int res; + struct child_process cp = CHILD_PROCESS_INIT; + struct update_data next = *update_data; -+ char *die_msg = xstrfmt(_("Failed to recurse into submodule path '%s'"), -+ update_data->displaypath); ++ int res; + + if (update_data->recursive_prefix) + prefixed_path = xstrfmt("%s%s/", update_data->recursive_prefix, @@ builtin/submodule--helper.c: static int module_set_branch(int argc, const char * + update_data_to_args(&next, &cp.args); + + /* die() if child process die()'d */ -+ if ((res = run_command(&cp)) == 128) -+ die("%s", die_msg); -+ if (res) -+ string_list_append(&err, die_msg); -+ -+ free(die_msg); -+ } -+ -+ if (err.nr) { -+ struct string_list_item *item; -+ for_each_string_list_item(item, &err) -+ fputs(item->string, stderr); -+ string_list_clear(&err, 0); -+ return 1; ++ res = run_command(&cp); ++ if (!res) ++ return 0; ++ die_message(_("Failed to recurse into submodule path '%s'"), ++ update_data->displaypath); ++ if (res == 128) ++ exit(res); ++ else if (res) ++ return 1; + } + + return 0; -- 2.35.0.914.ge5c8aab0d5b