Starting a fetchor send operation in a work tree currently keeps the
work tree locked until the operation is done. This is not necessary and
can be annoying when the server or network is slow.

Instead we can simply close the work tree once it is no longer needed,
and before we even start talking to the network.

ok?

-----------------------------------------------
 make 'got fetch' and 'got send' release the work tree lock earlier
 
 This avoids having work tree operations blocked while network transfers
 are in progress.
 
diff d71015b33dbfbef534be92e584006caddbf16aa6 14bc907b647ceac38ec441ecff3cf7827df2ef95
commit - d71015b33dbfbef534be92e584006caddbf16aa6
commit + 14bc907b647ceac38ec441ecff3cf7827df2ef95
blob - 4370083c6addb07677bb5bf8779721aad3c6fdec
blob + 63a9ace21208033f773d2710814090a45e1cd079
--- got/got.c
+++ got/got.c
@@ -2295,6 +2295,7 @@ cmd_fetch(int argc, char *argv[])
 	struct got_worktree *worktree = NULL;
 	const struct got_gotconfig *repo_conf = NULL, *worktree_conf = NULL;
 	struct got_pathlist_head refs, symrefs, wanted_branches, wanted_refs;
+	char *head_refname = NULL;
 	struct got_pathlist_entry *pe;
 	struct got_reflist_head remote_refs;
 	struct got_reflist_entry *re;
@@ -2536,6 +2537,18 @@ cmd_fetch(int argc, char *argv[])
 	if (error)
 		goto done;
 
+	if (worktree) {
+		head_refname = strdup(got_worktree_get_head_ref_name(worktree));
+		if (head_refname == NULL) {
+			error = got_error_from_errno("strdup");
+			goto done;
+		}
+
+		/* Release work tree lock. */
+		got_worktree_close(worktree);
+		worktree = NULL;
+	}
+
 	if (verbosity >= 0) {
 		printf("Connecting to \"%s\" %s://%s%s%s%s%s\n",
 		    remote->name, proto, host,
@@ -2586,13 +2599,9 @@ cmd_fetch(int argc, char *argv[])
 			break;
 		}
 
-		if (worktree) {
-			const char *refname;
-
-			refname = got_worktree_get_head_ref_name(worktree);
-			if (strncmp(refname, "refs/heads/", 11) == 0)
-				worktree_branch = refname;
-		}
+		if (head_refname &&
+		    strncmp(head_refname, "refs/heads/", 11) == 0)
+			worktree_branch = head_refname;
 	}
 
 	fpa.last_scaled_size[0] = '\0';
@@ -2787,6 +2796,7 @@ done:
 	got_pathlist_free(&wanted_branches, GOT_PATHLIST_FREE_NONE);
 	got_pathlist_free(&wanted_refs, GOT_PATHLIST_FREE_NONE);
 	got_ref_list_free(&remote_refs);
+	free(head_refname);
 	free(id_str);
 	free(cwd);
 	free(repo_path);
@@ -9974,6 +9984,12 @@ cmd_send(int argc, char *argv[])
 		nbranches++;
 	}
 
+	if (worktree) {
+		/* Release work tree lock. */
+		got_worktree_close(worktree);
+		worktree = NULL;
+	}
+
 	if (verbosity >= 0) {
 		printf("Connecting to \"%s\" %s://%s%s%s%s%s\n",
 		    remote->name, proto, host,