test_cmp: do not use "diff -u" on platforms that lack one

diff --git a/submodule.c b/submodule.c
index 86aad653b7c113106e365a9d4e4c38b3e7737457..676d48fb33119f393befcaf8998ad38741366525 100644 (file)
--- a/submodule.c
+++ b/submodule.c
@@ -4,22 +4,33 @@
 #include "diff.h"
 #include "commit.h"
 #include "revision.h"
+#include "run-command.h"
+#include "diffcore.h"
 
-int add_submodule_odb(const char *path)
+static int add_submodule_odb(const char *path)
 {
        struct strbuf objects_directory = STRBUF_INIT;
        struct alternate_object_database *alt_odb;
+       int ret = 0;
+       const char *git_dir;
 
-       strbuf_addf(&objects_directory, "%s/.git/objects/", path);
-       if (!is_directory(objects_directory.buf))
-               return -1;
-
+       strbuf_addf(&objects_directory, "%s/.git", path);
+       git_dir = read_gitfile_gently(objects_directory.buf);
+       if (git_dir) {
+               strbuf_reset(&objects_directory);
+               strbuf_addstr(&objects_directory, git_dir);
+       }
+       strbuf_addstr(&objects_directory, "/objects/");
+       if (!is_directory(objects_directory.buf)) {
+               ret = -1;
+               goto done;
+       }
        /* avoid adding it twice */
        for (alt_odb = alt_odb_list; alt_odb; alt_odb = alt_odb->next)
                if (alt_odb->name - alt_odb->base == objects_directory.len &&
                                !strncmp(alt_odb->base, objects_directory.buf,
                                        objects_directory.len))
-                       return 0;
+                       goto done;
 
        alt_odb = xmalloc(objects_directory.len + 42 + sizeof(*alt_odb));
        alt_odb->next = alt_odb_list;
@@ -30,11 +41,14 @@ int add_submodule_odb(const char *path)
        alt_odb->name[41] = '\0';
        alt_odb_list = alt_odb;
        prepare_alt_odb();
-       return 0;
+done:
+       strbuf_release(&objects_directory);
+       return ret;
 }
 
 void show_submodule_summary(FILE *f, const char *path,
                unsigned char one[20], unsigned char two[20],
+               unsigned dirty_submodule,
                const char *del, const char *add, const char *reset)
 {
        struct rev_info rev;
@@ -79,6 +93,16 @@ void show_submodule_summary(FILE *f, const char *path,
                        message = "(revision walker failed)";
        }
 
+       if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
+               fprintf(f, "Submodule %s contains untracked content\n", path);
+       if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
+               fprintf(f, "Submodule %s contains modified content\n", path);
+
+       if (!hashcmp(one, two)) {
+               strbuf_release(&sb);
+               return;
+       }
+
        strbuf_addf(&sb, "Submodule %s %s..", path,
                        find_unique_abbrev(one, DEFAULT_ABBREV));
        if (!fast_backward && !fast_forward)
@@ -112,3 +136,72 @@ void show_submodule_summary(FILE *f, const char *path,
        }
        strbuf_release(&sb);
 }
+
+unsigned is_submodule_modified(const char *path, int ignore_untracked)
+{
+       ssize_t len;
+       struct child_process cp;
+       const char *argv[] = {
+               "status",
+               "--porcelain",
+               NULL,
+               NULL,
+       };
+       struct strbuf buf = STRBUF_INIT;
+       unsigned dirty_submodule = 0;
+       const char *line, *next_line;
+       const char *git_dir;
+
+       strbuf_addf(&buf, "%s/.git", path);
+       git_dir = read_gitfile_gently(buf.buf);
+       if (!git_dir)
+               git_dir = buf.buf;
+       if (!is_directory(git_dir)) {
+               strbuf_release(&buf);
+               /* The submodule is not checked out, so it is not modified */
+               return 0;
+
+       }
+       strbuf_reset(&buf);
+
+       if (ignore_untracked)
+               argv[2] = "-uno";
+
+       memset(&cp, 0, sizeof(cp));
+       cp.argv = argv;
+       cp.env = local_repo_env;
+       cp.git_cmd = 1;
+       cp.no_stdin = 1;
+       cp.out = -1;
+       cp.dir = path;
+       if (start_command(&cp))
+               die("Could not run git status --porcelain");
+
+       len = strbuf_read(&buf, cp.out, 1024);
+       line = buf.buf;
+       while (len > 2) {
+               if ((line[0] == '?') && (line[1] == '?')) {
+                       dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
+                       if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
+                               break;
+               } else {
+                       dirty_submodule |= DIRTY_SUBMODULE_MODIFIED;
+                       if (ignore_untracked ||
+                           (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED))
+                               break;
+               }
+               next_line = strchr(line, '\n');
+               if (!next_line)
+                       break;
+               next_line++;
+               len -= (next_line - line);
+               line = next_line;
+       }
+       close(cp.out);
+
+       if (finish_command(&cp))
+               die("git status --porcelain failed");
+
+       strbuf_release(&buf);
+       return dirty_submodule;
+}