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-rw-r--r--submodule.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/submodule.c b/submodule.c
index 86aad653b7..3f851deb6a 100644
--- a/submodule.c
+++ b/submodule.c
@@ -4,6 +4,7 @@
#include "diff.h"
#include "commit.h"
#include "revision.h"
+#include "run-command.h"
int add_submodule_odb(const char *path)
{
@@ -112,3 +113,51 @@ void show_submodule_summary(FILE *f, const char *path,
}
strbuf_release(&sb);
}
+
+int is_submodule_modified(const char *path)
+{
+ int len;
+ struct child_process cp;
+ const char *argv[] = {
+ "status",
+ "--porcelain",
+ NULL,
+ };
+ char *env[3];
+ struct strbuf buf = STRBUF_INIT;
+
+ strbuf_addf(&buf, "%s/.git/", path);
+ if (!is_directory(buf.buf)) {
+ strbuf_release(&buf);
+ /* The submodule is not checked out, so it is not modified */
+ return 0;
+
+ }
+ strbuf_reset(&buf);
+
+ strbuf_addf(&buf, "GIT_WORK_TREE=%s", path);
+ env[0] = strbuf_detach(&buf, NULL);
+ strbuf_addf(&buf, "GIT_DIR=%s/.git", path);
+ env[1] = strbuf_detach(&buf, NULL);
+ env[2] = NULL;
+
+ memset(&cp, 0, sizeof(cp));
+ cp.argv = argv;
+ cp.env = (const char *const *)env;
+ cp.git_cmd = 1;
+ cp.no_stdin = 1;
+ cp.out = -1;
+ if (start_command(&cp))
+ die("Could not run git status --porcelain");
+
+ len = strbuf_read(&buf, cp.out, 1024);
+ close(cp.out);
+
+ if (finish_command(&cp))
+ die("git status --porcelain failed");
+
+ free(env[0]);
+ free(env[1]);
+ strbuf_release(&buf);
+ return len != 0;
+}