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[PATCH 13/16] worktree: make setup of new HEAD distinct from worktree population

From
Eric Sunshine <sunshine@sunshineco.com>
Date
Jul 11, 2015, 00:05 UTC
Message-ID
<1436573146-3893-14-git-send-email-sunshine@sunshineco.com>
In-Reply-To
<1436573146-3893-1-git-send-email-sunshine@sunshineco.com>

The eventual goal is for git-worktree to populate the new worktree via "git reset --hard" rather than "git checkout". As a consequence, git-worktree will no longer be able to delegate to git-branch the setting of the new worktree's HEAD to the desired branch (or commit, if detached). Therefore, make git-worktree responsible for setting up HEAD as either a symbolic reference if associated with a branch, or detached if not.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
---

As with the patch which separates branch creation from worktree population (by using git-branch instead of "git checkout -b"), this patch invokes git-symbolic-ref and git-update-ref rather than using the lower-level C API, due to the added value of those commands. If this proves the wrong approach, then the series can be re-rolled or follow-on patches can instead use the C API.

 builtin/worktree.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/builtin/worktree.c b/builtin/worktree.c
index babdef1..94c1701 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -274,12 +274,20 @@ static int add_worktree(const char *path, const char *refname,
 	setenv(GIT_WORK_TREE_ENVIRONMENT, path, 1);
 	memset(&cp, 0, sizeof(cp));
 	cp.git_cmd = 1;
+
+	if (commit)
+		argv_array_pushl(&cp.args, "update-ref", "HEAD",
+				 sha1_to_hex(commit->object.sha1), NULL);
+	else
+		argv_array_pushl(&cp.args, "symbolic-ref", "HEAD",
+				 symref.buf, NULL);
+	ret = run_command(&cp);
+	if (ret)
+		goto done;
+
+	cp.argv = NULL;
+	argv_array_clear(&cp.args);
 	argv_array_push(&cp.args, "checkout");
-	if (opts->force)
-		argv_array_push(&cp.args, "--ignore-other-worktrees");
-	if (opts->detach)
-		argv_array_push(&cp.args, "--detach");
-	argv_array_push(&cp.args, refname);
 	ret = run_command(&cp);
 	if (!ret) {
 		is_junk = 0;
@@ -288,6 +296,7 @@ static int add_worktree(const char *path, const char *refname,
 		junk_work_tree = NULL;
 		junk_git_dir = NULL;
 	}
+done:
 	strbuf_reset(&sb);
 	strbuf_addf(&sb, "%s/locked", sb_repo.buf);
 	unlink_or_warn(sb.buf);
-- 
2.5.0.rc1.201.ga12d9f8
Previous: Eric SunshineNext: Eric Sunshine
Message 21 of 31 in “worktree: use "git reset --hard" to populate worktree”
  1. 00/16 worktree: use "git reset --hard" to populate worktreeEric Sunshine, Jul 11, 2015
  2. 01/16 checkout: avoid resolving HEAD unnecessarilyEric Sunshine, Jul 11, 2015
  3. 02/16 checkout: name check_linked_checkouts() more meaningfullyEric Sunshine, Jul 11, 2015
  4. 03/16 checkout: improve die_if_checked_out() robustnessEric Sunshine, Jul 11, 2015
  5. 04/16 checkout: die_if_checked_out: simplify strbuf managementEric Sunshine, Jul 11, 2015
  6. 05/16 checkout: generalize die_if_checked_out() branch name argumentEric Sunshine, Jul 11, 2015
  7. 06/16 branch: publish die_if_checked_out()Eric Sunshine, Jul 11, 2015
  8. 07/16 worktree: simplify new branch (-b/-B) option checkingEric Sunshine, Jul 11, 2015
  9. 08/16 worktree: introduce options containerEric Sunshine, Jul 11, 2015
  10. 09/16 worktree: make --detach mutually exclusive with -b/-BEric Sunshine, Jul 11, 2015
  11. 10/16 worktree: make branch creation distinct from worktree populationEric Sunshine, Jul 11, 2015
  12. Duy NguyenJul 12, 2015
  13. Eric SunshineJul 12, 2015
  14. Duy NguyenJul 12, 2015
  15. Eric SunshineJul 12, 2015
  16. Eric SunshineJul 12, 2015
  17. Eric SunshineJul 12, 2015
  18. Duy NguyenJul 12, 2015
  19. 11/16 worktree: add_worktree: construct worktree-population command locallyEric Sunshine, Jul 11, 2015
  20. 12/16 worktree: detect branch symref/detach and error conditions locallyEric Sunshine, Jul 11, 2015
  21. 13/16 worktree: make setup of new HEAD distinct from worktree populationEric Sunshine, Jul 11, 2015
  22. 14/16 worktree: avoid resolving HEAD unnecessarilyEric Sunshine, Jul 11, 2015
  23. 15/16 worktree: populate via "git reset --hard" rather than "git checkout"Eric Sunshine, Jul 11, 2015
  24. 16/16 checkout: drop intimate knowledge of new worktree initial populationEric Sunshine, Jul 11, 2015
  25. Junio C HamanoJul 13, 2015
  26. Michael J GruberJul 14, 2015
  27. Duy NguyenJul 14, 2015
  28. Eric SunshineJul 14, 2015
  29. Eric SunshineJul 15, 2015
  30. Duy NguyenJul 15, 2015
  31. Eric SunshineJul 12, 2015

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