difftool: handle unmerged files in dir-diff mode

diff --git a/builtin/grep.c b/builtin/grep.c
index 3ba35ecf935f9462d8bb4340837f57e0e7219d05..111b6f6cf1a61b0fb481101fcdc5a9f3f48c4650 100644 (file)
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -24,11 +24,11 @@ static char const * const grep_usage[] = {
        NULL
 };
 
-static int use_threads = 1;
+#define GREP_NUM_THREADS_DEFAULT 8
+static int num_threads;
 
 #ifndef NO_PTHREADS
-#define THREADS 8
-static pthread_t threads[THREADS];
+static pthread_t *threads;
 
 /* We use one producer thread and THREADS consumer
  * threads. The producer adds struct work_items to 'todo' and the
@@ -63,13 +63,13 @@ static pthread_mutex_t grep_mutex;
 
 static inline void grep_lock(void)
 {
-       if (use_threads)
+       if (num_threads)
                pthread_mutex_lock(&grep_mutex);
 }
 
 static inline void grep_unlock(void)
 {
-       if (use_threads)
+       if (num_threads)
                pthread_mutex_unlock(&grep_mutex);
 }
 
@@ -206,7 +206,8 @@ static void start_threads(struct grep_opt *opt)
                strbuf_init(&todo[i].out, 0);
        }
 
-       for (i = 0; i < ARRAY_SIZE(threads); i++) {
+       threads = xcalloc(num_threads, sizeof(*threads));
+       for (i = 0; i < num_threads; i++) {
                int err;
                struct grep_opt *o = grep_opt_dup(opt);
                o->output = strbuf_out;
@@ -238,12 +239,14 @@ static int wait_all(void)
        pthread_cond_broadcast(&cond_add);
        grep_unlock();
 
-       for (i = 0; i < ARRAY_SIZE(threads); i++) {
+       for (i = 0; i < num_threads; i++) {
                void *h;
                pthread_join(threads[i], &h);
                hit |= (int) (intptr_t) h;
        }
 
+       free(threads);
+
        pthread_mutex_destroy(&grep_mutex);
        pthread_mutex_destroy(&grep_read_mutex);
        pthread_mutex_destroy(&grep_attr_mutex);
@@ -267,6 +270,14 @@ static int grep_cmd_config(const char *var, const char *value, void *cb)
        int st = grep_config(var, value, cb);
        if (git_color_default_config(var, value, cb) < 0)
                st = -1;
+
+       if (!strcmp(var, "grep.threads")) {
+               num_threads = git_config_int(var, value);
+               if (num_threads < 0)
+                       die(_("invalid number of threads specified (%d) for %s"),
+                           num_threads, var);
+       }
+
        return st;
 }
 
@@ -294,7 +305,7 @@ static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1,
        }
 
 #ifndef NO_PTHREADS
-       if (use_threads) {
+       if (num_threads) {
                add_work(opt, GREP_SOURCE_SHA1, pathbuf.buf, path, sha1);
                strbuf_release(&pathbuf);
                return 0;
@@ -323,7 +334,7 @@ static int grep_file(struct grep_opt *opt, const char *filename)
                strbuf_addstr(&buf, filename);
 
 #ifndef NO_PTHREADS
-       if (use_threads) {
+       if (num_threads) {
                add_work(opt, GREP_SOURCE_FILE, buf.buf, filename, filename);
                strbuf_release(&buf);
                return 0;
@@ -354,17 +365,17 @@ static void append_path(struct grep_opt *opt, const void *data, size_t len)
 static void run_pager(struct grep_opt *opt, const char *prefix)
 {
        struct string_list *path_list = opt->output_priv;
-       const char **argv = xmalloc(sizeof(const char *) * (path_list->nr + 1));
+       struct child_process child = CHILD_PROCESS_INIT;
        int i, status;
 
        for (i = 0; i < path_list->nr; i++)
-               argv[i] = path_list->items[i].string;
-       argv[path_list->nr] = NULL;
+               argv_array_push(&child.args, path_list->items[i].string);
+       child.dir = prefix;
+       child.use_shell = 1;
 
-       status = run_command_v_opt_cd_env(argv, RUN_USING_SHELL, prefix, NULL);
+       status = run_command(&child);
        if (status)
                exit(status);
-       free(argv);
 }
 
 static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec, int cached)
@@ -511,12 +522,14 @@ static int grep_objects(struct grep_opt *opt, const struct pathspec *pathspec,
 }
 
 static int grep_directory(struct grep_opt *opt, const struct pathspec *pathspec,
-                         int exc_std)
+                         int exc_std, int use_index)
 {
        struct dir_struct dir;
        int i, hit = 0;
 
        memset(&dir, 0, sizeof(dir));
+       if (!use_index)
+               dir.flags |= DIR_NO_GITLINKS;
        if (exc_std)
                setup_standard_excludes(&dir);
 
@@ -562,7 +575,7 @@ static int file_callback(const struct option *opt, const char *arg, int unset)
        patterns = from_stdin ? stdin : fopen(arg, "r");
        if (!patterns)
                die_errno(_("cannot open '%s'"), arg);
-       while (strbuf_getline(&sb, patterns, '\n') == 0) {
+       while (strbuf_getline(&sb, patterns) == 0) {
                /* ignore empty line like grep does */
                if (sb.len == 0)
                        continue;
@@ -697,6 +710,8 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
                        N_("show <n> context lines before matches")),
                OPT_INTEGER('A', "after-context", &opt.post_context,
                        N_("show <n> context lines after matches")),
+               OPT_INTEGER(0, "threads", &num_threads,
+                       N_("use <n> worker threads")),
                OPT_NUMBER_CALLBACK(&opt, N_("shortcut for -C NUM"),
                        context_callback),
                OPT_BOOL('p', "show-function", &opt.funcname,
@@ -755,9 +770,15 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
                             PARSE_OPT_STOP_AT_NON_OPTION);
        grep_commit_pattern_type(pattern_type_arg, &opt);
 
-       if (use_index && !startup_info->have_repository)
-               /* die the same way as if we did it at the beginning */
-               setup_git_directory();
+       if (use_index && !startup_info->have_repository) {
+               int fallback = 0;
+               git_config_get_bool("grep.fallbacktonoindex", &fallback);
+               if (fallback)
+                       use_index = 0;
+               else
+                       /* die the same way as if we did it at the beginning */
+                       setup_git_directory();
+       }
 
        /*
         * skip a -- separator; we know it cannot be
@@ -786,7 +807,6 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
                opt.output_priv = &path_list;
                opt.output = append_path;
                string_list_append(&path_list, show_in_pager);
-               use_threads = 0;
        }
 
        if (!opt.pattern_list)
@@ -817,14 +837,18 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
        }
 
 #ifndef NO_PTHREADS
-       if (list.nr || cached || online_cpus() == 1)
-               use_threads = 0;
+       if (list.nr || cached || show_in_pager)
+               num_threads = 0;
+       else if (num_threads == 0)
+               num_threads = GREP_NUM_THREADS_DEFAULT;
+       else if (num_threads < 0)
+               die(_("invalid number of threads specified (%d)"), num_threads);
 #else
-       use_threads = 0;
+       num_threads = 0;
 #endif
 
 #ifndef NO_PTHREADS
-       if (use_threads) {
+       if (num_threads) {
                if (!(opt.name_only || opt.unmatch_name_only || opt.count)
                    && (opt.pre_context || opt.post_context ||
                        opt.file_break || opt.funcbody))
@@ -880,7 +904,7 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
                int use_exclude = (opt_exclude < 0) ? use_index : !!opt_exclude;
                if (list.nr)
                        die(_("--no-index or --untracked cannot be used with revs."));
-               hit = grep_directory(&opt, &pathspec, use_exclude);
+               hit = grep_directory(&opt, &pathspec, use_exclude, use_index);
        } else if (0 <= opt_exclude) {
                die(_("--[no-]exclude-standard cannot be used for tracked contents."));
        } else if (!list.nr) {
@@ -894,7 +918,7 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
                hit = grep_objects(&opt, &pathspec, &list);
        }
 
-       if (use_threads)
+       if (num_threads)
                hit |= wait_all();
        if (hit && show_in_pager)
                run_pager(&opt, prefix);