From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-6.0 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD shortcircuit=no autolearn=ham autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id C013A20798 for ; Fri, 11 Nov 2016 23:58:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965042AbcKKX6U (ORCPT ); Fri, 11 Nov 2016 18:58:20 -0500 Received: from mail-pg0-f47.google.com ([74.125.83.47]:33582 "EHLO mail-pg0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964958AbcKKX6T (ORCPT ); Fri, 11 Nov 2016 18:58:19 -0500 Received: by mail-pg0-f47.google.com with SMTP id 3so18486084pgd.0 for ; Fri, 11 Nov 2016 15:58:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=i+OUv0OmF1Who8ASXi9UKMYmSGIrMEFja42l7l++ENE=; b=NDgr6yRA7lqe1qcjRlDYejNuf0cuQZXb9tCuezgKq03KQTV5UiR929a9YEoWMFlD+o 85xdwnmFhYGPJOad7gaZXbjHs3deCZbdYuC94uSyLQ+lqIoclumV5RZys18zEz7tsPio 8xttBDlmEuZI7i/yPiiAeDaEz0lUZn8qIMPJKC6mSGCW+JDWnjK2BwRuFEOau+h4jsxz y/T5Pj7j+MZviveK7dFxDprLlpKumWsgewBxDZynMYgpx/pgpmPWt33UgH2v/WM1eOB7 tVGOT9X0l366kyqS0iDExG1fjTH39/VelVXDIaJtw8l2qKs31fycSjDcaEp+mthwuVdW heAA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=i+OUv0OmF1Who8ASXi9UKMYmSGIrMEFja42l7l++ENE=; b=I6Yrjr7UeMElnINWvTB0NiqvKNku7UaGUKQhdPXBUzVf2LlrAJSdeuxSjPi9iI2cIb cuFPp1s+vPwVlrJMVkEkDvkPWZuZnV4QsbpjrXptieYIo7u99aoxT3ThkVx6C8Cd13Tm o0lP4ZlSO6DvfJXJlWC8m4T9S8Ehs1I3Fn7HTL/uUbFBoA2f143urkLQVejE+Rk7cnYK pmm7udgDWMbGHoZtxqgL6wNPpip76JTggPRzQjYtfn+eRCGzZlegHHJpTATVAsrZkmNt /0D2fXpuHn7GgkUIX3s3fWZaESW/4k0kkbsyGcbRjNrbIzSuZzsqyZ5hgBkqba7IZyS+ exOQ== X-Gm-Message-State: ABUngveHaURADnp4caSHASzu+KHKt7fgvfmRZ7oHOdmnE5cQClZyAuBRsu2WLI+aDx/iA1Qq X-Received: by 10.98.74.18 with SMTP id x18mr11800191pfa.58.1478908297470; Fri, 11 Nov 2016 15:51:37 -0800 (PST) Received: from roshar.mtv.corp.google.com ([172.27.69.28]) by smtp.gmail.com with ESMTPSA id r74sm17568314pfl.79.2016.11.11.15.51.36 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 11 Nov 2016 15:51:36 -0800 (PST) From: Brandon Williams To: git@vger.kernel.org Cc: Brandon Williams , sbeller@google.com, jonathantanmy@google.com, gitster@pobox.com Subject: [PATCH v3 4/6] grep: optionally recurse into submodules Date: Fri, 11 Nov 2016 15:51:11 -0800 Message-Id: <1478908273-190166-5-git-send-email-bmwill@google.com> X-Mailer: git-send-email 2.8.0.rc3.226.g39d4020 In-Reply-To: <1478908273-190166-1-git-send-email-bmwill@google.com> References: <1477953496-103596-1-git-send-email-bmwill@google.com> <1478908273-190166-1-git-send-email-bmwill@google.com> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Allow grep to recognize submodules and recursively search for patterns in each submodule. This is done by forking off a process to recursively call grep on each submodule. The top level --super-prefix option is used to pass a path to the submodule which can in turn be used to prepend to output or in pathspec matching logic. Recursion only occurs for submodules which have been initialized and checked out by the parent project. If a submodule hasn't been initialized and checked out it is simply skipped. In order to support the existing multi-threading infrastructure in grep, output from each child process is captured in a strbuf so that it can be later printed to the console in an ordered fashion. To limit the number of theads that are created, each child process has half the number of threads as its parents (minimum of 1), otherwise we potentailly have a fork-bomb. Signed-off-by: Brandon Williams --- Documentation/git-grep.txt | 5 + builtin/grep.c | 300 ++++++++++++++++++++++++++++++++++--- git.c | 2 +- t/t7814-grep-recurse-submodules.sh | 99 ++++++++++++ 4 files changed, 385 insertions(+), 21 deletions(-) create mode 100755 t/t7814-grep-recurse-submodules.sh diff --git a/Documentation/git-grep.txt b/Documentation/git-grep.txt index 0ecea6e..17aa1ba 100644 --- a/Documentation/git-grep.txt +++ b/Documentation/git-grep.txt @@ -26,6 +26,7 @@ SYNOPSIS [--threads ] [-f ] [-e] [--and|--or|--not|(|)|-e ...] + [--recurse-submodules] [ [--[no-]exclude-standard] [--cached | --no-index | --untracked] | ...] [--] [...] @@ -88,6 +89,10 @@ OPTIONS mechanism. Only useful when searching files in the current directory with `--no-index`. +--recurse-submodules:: + Recursively search in each submodule that has been initialized and + checked out in the repository. + -a:: --text:: Process binary files as if they were text. diff --git a/builtin/grep.c b/builtin/grep.c index 8887b6a..1fd292f 100644 --- a/builtin/grep.c +++ b/builtin/grep.c @@ -18,12 +18,20 @@ #include "quote.h" #include "dir.h" #include "pathspec.h" +#include "submodule.h" static char const * const grep_usage[] = { N_("git grep [] [-e] [...] [[--] ...]"), NULL }; +static const char *super_prefix; +static int recurse_submodules; +static struct argv_array submodule_options = ARGV_ARRAY_INIT; + +static int grep_submodule_launch(struct grep_opt *opt, + const struct grep_source *gs); + #define GREP_NUM_THREADS_DEFAULT 8 static int num_threads; @@ -174,7 +182,10 @@ static void *run(void *arg) break; opt->output_priv = w; - hit |= grep_source(opt, &w->source); + if (w->source.type == GREP_SOURCE_SUBMODULE) + hit |= grep_submodule_launch(opt, &w->source); + else + hit |= grep_source(opt, &w->source); grep_source_clear_data(&w->source); work_done(w); } @@ -300,6 +311,10 @@ static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1, if (opt->relative && opt->prefix_length) { quote_path_relative(filename + tree_name_len, opt->prefix, &pathbuf); strbuf_insert(&pathbuf, 0, filename, tree_name_len); + } else if (super_prefix) { + strbuf_add(&pathbuf, filename, tree_name_len); + strbuf_addstr(&pathbuf, super_prefix); + strbuf_addstr(&pathbuf, filename + tree_name_len); } else { strbuf_addstr(&pathbuf, filename); } @@ -328,10 +343,13 @@ static int grep_file(struct grep_opt *opt, const char *filename) { struct strbuf buf = STRBUF_INIT; - if (opt->relative && opt->prefix_length) + if (opt->relative && opt->prefix_length) { quote_path_relative(filename, opt->prefix, &buf); - else + } else { + if (super_prefix) + strbuf_addstr(&buf, super_prefix); strbuf_addstr(&buf, filename); + } #ifndef NO_PTHREADS if (num_threads) { @@ -378,31 +396,258 @@ static void run_pager(struct grep_opt *opt, const char *prefix) exit(status); } -static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec, int cached) +static void compile_submodule_options(const struct grep_opt *opt, + const struct pathspec *pathspec, + int cached, int untracked, + int opt_exclude, int use_index, + int pattern_type_arg) +{ + struct grep_pat *pattern; + int i; + + if (recurse_submodules) + argv_array_push(&submodule_options, "--recurse-submodules"); + + if (cached) + argv_array_push(&submodule_options, "--cached"); + if (!use_index) + argv_array_push(&submodule_options, "--no-index"); + if (untracked) + argv_array_push(&submodule_options, "--untracked"); + if (opt_exclude > 0) + argv_array_push(&submodule_options, "--exclude-standard"); + + if (opt->invert) + argv_array_push(&submodule_options, "-v"); + if (opt->ignore_case) + argv_array_push(&submodule_options, "-i"); + if (opt->word_regexp) + argv_array_push(&submodule_options, "-w"); + switch (opt->binary) { + case GREP_BINARY_NOMATCH: + argv_array_push(&submodule_options, "-I"); + break; + case GREP_BINARY_TEXT: + argv_array_push(&submodule_options, "-a"); + break; + default: + break; + } + if (opt->allow_textconv) + argv_array_push(&submodule_options, "--textconv"); + if (opt->max_depth != -1) + argv_array_pushf(&submodule_options, "--max-depth=%d", + opt->max_depth); + if (opt->linenum) + argv_array_push(&submodule_options, "-n"); + if (!opt->pathname) + argv_array_push(&submodule_options, "-h"); + if (!opt->relative) + argv_array_push(&submodule_options, "--full-name"); + if (opt->name_only) + argv_array_push(&submodule_options, "-l"); + if (opt->unmatch_name_only) + argv_array_push(&submodule_options, "-L"); + if (opt->null_following_name) + argv_array_push(&submodule_options, "-z"); + if (opt->count) + argv_array_push(&submodule_options, "-c"); + if (opt->file_break) + argv_array_push(&submodule_options, "--break"); + if (opt->heading) + argv_array_push(&submodule_options, "--heading"); + if (opt->pre_context) + argv_array_pushf(&submodule_options, "--before-context=%d", + opt->pre_context); + if (opt->post_context) + argv_array_pushf(&submodule_options, "--after-context=%d", + opt->post_context); + if (opt->funcname) + argv_array_push(&submodule_options, "-p"); + if (opt->funcbody) + argv_array_push(&submodule_options, "-W"); + if (opt->all_match) + argv_array_push(&submodule_options, "--all-match"); + if (opt->debug) + argv_array_push(&submodule_options, "--debug"); + if (opt->status_only) + argv_array_push(&submodule_options, "-q"); + + switch (pattern_type_arg) { + case GREP_PATTERN_TYPE_BRE: + argv_array_push(&submodule_options, "-G"); + break; + case GREP_PATTERN_TYPE_ERE: + argv_array_push(&submodule_options, "-E"); + break; + case GREP_PATTERN_TYPE_FIXED: + argv_array_push(&submodule_options, "-F"); + break; + case GREP_PATTERN_TYPE_PCRE: + argv_array_push(&submodule_options, "-P"); + break; + case GREP_PATTERN_TYPE_UNSPECIFIED: + break; + } + + for (pattern = opt->pattern_list; pattern != NULL; + pattern = pattern->next) { + switch (pattern->token) { + case GREP_PATTERN: + argv_array_pushf(&submodule_options, "-e%s", + pattern->pattern); + break; + case GREP_AND: + case GREP_OPEN_PAREN: + case GREP_CLOSE_PAREN: + case GREP_NOT: + case GREP_OR: + argv_array_push(&submodule_options, pattern->pattern); + break; + /* BODY and HEAD are not used by git-grep */ + case GREP_PATTERN_BODY: + case GREP_PATTERN_HEAD: + break; + } + } + + /* + * Limit number of threads for child process to use. + * This is to prevent potential fork-bomb behavior of git-grep as each + * submodule process has its own thread pool. + */ + if (num_threads) + argv_array_pushf(&submodule_options, "--threads=%d", + (num_threads + 1) / 2); + + /* Add Pathspecs */ + argv_array_push(&submodule_options, "--"); + for (i = 0; i < pathspec->nr; i++) + argv_array_push(&submodule_options, + pathspec->items[i].original); +} + +/* + * Launch child process to grep contents of a submodule + */ +static int grep_submodule_launch(struct grep_opt *opt, + const struct grep_source *gs) +{ + struct child_process cp = CHILD_PROCESS_INIT; + int status, i; + struct work_item *w = opt->output_priv; + + prepare_submodule_repo_env(&cp.env_array); + + /* Add super prefix */ + argv_array_pushf(&cp.args, "--super-prefix=%s%s/", + super_prefix ? super_prefix : "", + gs->name); + argv_array_push(&cp.args, "grep"); + + /* Add options */ + for (i = 0; i < submodule_options.argc; i++) + argv_array_push(&cp.args, submodule_options.argv[i]); + + cp.git_cmd = 1; + cp.dir = gs->path; + + /* + * Capture output to output buffer and check the return code from the + * child process. A '0' indicates a hit, a '1' indicates no hit and + * anything else is an error. + */ + status = capture_command(&cp, &w->out, 0); + if (status && (status != 1)) { + /* flush the buffer */ + write_or_die(1, w->out.buf, w->out.len); + die("process for submodule '%s' failed with exit code: %d", + gs->name, status); + } + + /* invert the return code to make a hit equal to 1 */ + return !status; +} + +/* + * Prep grep structures for a submodule grep + * sha1: the sha1 of the submodule or NULL if using the working tree + * filename: name of the submodule including tree name of parent + * path: location of the submodule + */ +static int grep_submodule(struct grep_opt *opt, const unsigned char *sha1, + const char *filename, const char *path) +{ + if (!(is_submodule_initialized(path) && + is_submodule_populated(path))) + return 0; + +#ifndef NO_PTHREADS + if (num_threads) { + add_work(opt, GREP_SOURCE_SUBMODULE, filename, path, sha1); + return 0; + } else +#endif + { + struct work_item w; + int hit; + + grep_source_init(&w.source, GREP_SOURCE_SUBMODULE, + filename, path, sha1); + strbuf_init(&w.out, 0); + opt->output_priv = &w; + hit = grep_submodule_launch(opt, &w.source); + + write_or_die(1, w.out.buf, w.out.len); + + grep_source_clear(&w.source); + strbuf_release(&w.out); + return hit; + } +} + +static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec, + int cached) { int hit = 0; int nr; + struct strbuf name = STRBUF_INIT; + int name_base_len = 0; + if (super_prefix) { + name_base_len = strlen(super_prefix); + strbuf_addstr(&name, super_prefix); + } + read_cache(); for (nr = 0; nr < active_nr; nr++) { const struct cache_entry *ce = active_cache[nr]; - if (!S_ISREG(ce->ce_mode)) - continue; - if (!ce_path_match(ce, pathspec, NULL)) - continue; - /* - * If CE_VALID is on, we assume worktree file and its cache entry - * are identical, even if worktree file has been modified, so use - * cache version instead - */ - if (cached || (ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) { - if (ce_stage(ce) || ce_intent_to_add(ce)) - continue; - hit |= grep_sha1(opt, ce->oid.hash, ce->name, 0, - ce->name); + strbuf_setlen(&name, name_base_len); + strbuf_addstr(&name, ce->name); + + if (S_ISREG(ce->ce_mode) && + match_pathspec(pathspec, name.buf, name.len, 0, NULL, + S_ISDIR(ce->ce_mode) || + S_ISGITLINK(ce->ce_mode))) { + /* + * If CE_VALID is on, we assume worktree file and its + * cache entry are identical, even if worktree file has + * been modified, so use cache version instead + */ + if (cached || (ce->ce_flags & CE_VALID) || + ce_skip_worktree(ce)) { + if (ce_stage(ce) || ce_intent_to_add(ce)) + continue; + hit |= grep_sha1(opt, ce->oid.hash, ce->name, + 0, ce->name); + } else { + hit |= grep_file(opt, ce->name); + } + } else if (recurse_submodules && S_ISGITLINK(ce->ce_mode) && + submodule_path_match(pathspec, name.buf, NULL)) { + hit |= grep_submodule(opt, NULL, ce->name, ce->name); } - else - hit |= grep_file(opt, ce->name); + if (ce_stage(ce)) { do { nr++; @@ -413,6 +658,8 @@ static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec, int if (hit && opt->status_only) break; } + + strbuf_release(&name); return hit; } @@ -651,6 +898,8 @@ int cmd_grep(int argc, const char **argv, const char *prefix) N_("search in both tracked and untracked files")), OPT_SET_INT(0, "exclude-standard", &opt_exclude, N_("ignore files specified via '.gitignore'"), 1), + OPT_BOOL(0, "recurse-submodules", &recurse_submodules, + N_("recursivley search in each submodule")), OPT_GROUP(""), OPT_BOOL('v', "invert-match", &opt.invert, N_("show non-matching lines")), @@ -755,6 +1004,7 @@ int cmd_grep(int argc, const char **argv, const char *prefix) init_grep_defaults(); git_config(grep_cmd_config, NULL); grep_init(&opt, prefix); + super_prefix = get_super_prefix(); /* * If there is no -- then the paths must exist in the working @@ -872,6 +1122,13 @@ int cmd_grep(int argc, const char **argv, const char *prefix) pathspec.max_depth = opt.max_depth; pathspec.recursive = 1; + if (recurse_submodules) { + gitmodules_config(); + compile_submodule_options(&opt, &pathspec, cached, untracked, + opt_exclude, use_index, + pattern_type_arg); + } + if (show_in_pager && (cached || list.nr)) die(_("--open-files-in-pager only works on the worktree")); @@ -895,6 +1152,9 @@ int cmd_grep(int argc, const char **argv, const char *prefix) } } + if (recurse_submodules && (!use_index || untracked || list.nr)) + die(_("option not supported with --recurse-submodules.")); + if (!show_in_pager && !opt.status_only) setup_pager(); diff --git a/git.c b/git.c index efa1059..a156efd 100644 --- a/git.c +++ b/git.c @@ -434,7 +434,7 @@ static struct cmd_struct commands[] = { { "fsck-objects", cmd_fsck, RUN_SETUP }, { "gc", cmd_gc, RUN_SETUP }, { "get-tar-commit-id", cmd_get_tar_commit_id }, - { "grep", cmd_grep, RUN_SETUP_GENTLY }, + { "grep", cmd_grep, RUN_SETUP_GENTLY | SUPPORT_SUPER_PREFIX }, { "hash-object", cmd_hash_object }, { "help", cmd_help }, { "index-pack", cmd_index_pack, RUN_SETUP_GENTLY }, diff --git a/t/t7814-grep-recurse-submodules.sh b/t/t7814-grep-recurse-submodules.sh new file mode 100755 index 0000000..b670c70 --- /dev/null +++ b/t/t7814-grep-recurse-submodules.sh @@ -0,0 +1,99 @@ +#!/bin/sh + +test_description='Test grep recurse-submodules feature + +This test verifies the recurse-submodules feature correctly greps across +submodules. +' + +. ./test-lib.sh + +test_expect_success 'setup directory structure and submodule' ' + echo "foobar" >a && + mkdir b && + echo "bar" >b/b && + git add a b && + git commit -m "add a and b" && + git init submodule && + echo "foobar" >submodule/a && + git -C submodule add a && + git -C submodule commit -m "add a" && + git submodule add ./submodule && + git commit -m "added submodule" +' + +test_expect_success 'grep correctly finds patterns in a submodule' ' + cat >expect <<-\EOF && + a:foobar + b/b:bar + submodule/a:foobar + EOF + + git grep -e "bar" --recurse-submodules >actual && + test_cmp expect actual +' + +test_expect_success 'grep and basic pathspecs' ' + cat >expect <<-\EOF && + submodule/a:foobar + EOF + + git grep -e. --recurse-submodules -- submodule >actual && + test_cmp expect actual +' + +test_expect_success 'grep and nested submodules' ' + git init submodule/sub && + echo "foobar" >submodule/sub/a && + git -C submodule/sub add a && + git -C submodule/sub commit -m "add a" && + git -C submodule submodule add ./sub && + git -C submodule add sub && + git -C submodule commit -m "added sub" && + git add submodule && + git commit -m "updated submodule" && + + cat >expect <<-\EOF && + a:foobar + b/b:bar + submodule/a:foobar + submodule/sub/a:foobar + EOF + + git grep -e "bar" --recurse-submodules > actual && + test_cmp expect actual +' + +test_expect_success 'grep and multiple patterns' ' + cat >expect <<-\EOF && + a:foobar + submodule/a:foobar + submodule/sub/a:foobar + EOF + + git grep -e "bar" --and -e "foo" --recurse-submodules > actual && + test_cmp expect actual +' + +test_expect_success 'grep and multiple patterns' ' + cat >expect <<-\EOF && + b/b:bar + EOF + + git grep -e "bar" --and --not -e "foo" --recurse-submodules > actual && + test_cmp expect actual +' + +test_incompatible_with_recurse_submodules () +{ + test_expect_success "--recurse-submodules and $1 are incompatible" " + test_must_fail git grep -e. --recurse-submodules $1 2>actual && + test_i18ngrep 'not supported with --recurse-submodules' actual + " +} + +test_incompatible_with_recurse_submodules --untracked +test_incompatible_with_recurse_submodules --no-index +test_incompatible_with_recurse_submodules HEAD + +test_done -- 2.8.0.rc3.226.g39d4020