Teach fast-import to import subtrees named by tree id

diff --git a/submodule.c b/submodule.c
index 5d286e409ee2a9b12d6b64cb05394eca18fe3e97..61cb6e21ddfc789ce59597c96204e7904cd9359e 100644 (file)
--- a/submodule.c
+++ b/submodule.c
@@ -5,14 +5,22 @@
 #include "commit.h"
 #include "revision.h"
 #include "run-command.h"
+#include "diffcore.h"
 
 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);
+       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;
@@ -38,6 +46,19 @@ static int add_submodule_odb(const char *path)
        return ret;
 }
 
+void handle_ignore_submodules_arg(struct diff_options *diffopt,
+                                 const char *arg)
+{
+       if (!strcmp(arg, "all"))
+               DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES);
+       else if (!strcmp(arg, "untracked"))
+               DIFF_OPT_SET(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
+       else if (!strcmp(arg, "dirty"))
+               DIFF_OPT_SET(diffopt, IGNORE_DIRTY_SUBMODULES);
+       else
+               die("bad --ignore-submodules argument: %s", arg);
+}
+
 void show_submodule_summary(FILE *f, const char *path,
                unsigned char one[20], unsigned char two[20],
                unsigned dirty_submodule,
@@ -85,13 +106,21 @@ 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)
                strbuf_addch(&sb, '.');
        strbuf_addf(&sb, "%s", find_unique_abbrev(two, DEFAULT_ABBREV));
-       if (dirty_submodule)
-               strbuf_add(&sb, "-dirty", 6);
        if (message)
                strbuf_addf(&sb, " %s\n", message);
        else
@@ -121,23 +150,26 @@ void show_submodule_summary(FILE *f, const char *path,
        strbuf_release(&sb);
 }
 
-int is_submodule_modified(const char *path)
+unsigned is_submodule_modified(const char *path, int ignore_untracked)
 {
-       int len, i;
+       ssize_t len;
        struct child_process cp;
        const char *argv[] = {
                "status",
                "--porcelain",
                NULL,
+               NULL,
        };
-       const char *env[LOCAL_REPO_ENV_SIZE + 3];
        struct strbuf buf = STRBUF_INIT;
-
-       for (i = 0; i < LOCAL_REPO_ENV_SIZE; i++)
-               env[i] = local_repo_env[i];
-
-       strbuf_addf(&buf, "%s/.git/", path);
-       if (!is_directory(buf.buf)) {
+       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;
@@ -145,29 +177,44 @@ int is_submodule_modified(const char *path)
        }
        strbuf_reset(&buf);
 
-       strbuf_addf(&buf, "GIT_WORK_TREE=%s", path);
-       env[i++] = strbuf_detach(&buf, NULL);
-       strbuf_addf(&buf, "GIT_DIR=%s/.git", path);
-       env[i++] = strbuf_detach(&buf, NULL);
-       env[i] = NULL;
+       if (ignore_untracked)
+               argv[2] = "-uno";
 
        memset(&cp, 0, sizeof(cp));
        cp.argv = argv;
-       cp.env = env;
+       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");
 
-       for (i = LOCAL_REPO_ENV_SIZE; env[i]; i++)
-               free((char *)env[i]);
        strbuf_release(&buf);
-       return len != 0;
+       return dirty_submodule;
 }