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[PATCH v2 14/20] worktree: elucidate environment variables intended for child processes

From
Eric Sunshine <sunshine@sunshineco.com>
Date
Jul 16, 2015, 08:20 UTC
Message-ID
<1437034825-32054-15-git-send-email-sunshine@sunshineco.com>
In-Reply-To
<1437034825-32054-1-git-send-email-sunshine@sunshineco.com>

Take advantage of 'struct child_process.env' to make it obvious that environment variables set by add_worktree() are intended specifically for sub-commands it invokes to operate in the new worktree.

We assign a local 'struct argv_array' to child_process.env, rather than utilizing the child_process.env_array 'struct argv_array', because future patches will make add_worktree() invoke additional sub-commands, and it's simpler to populate the environment array just once, whereas child_process.env_array gets cleared after each invocation, thus would require re-population for each sub-command.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
---
New in v2.
 builtin/worktree.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/builtin/worktree.c b/builtin/worktree.c
index 9be1c74..7ae186f 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -186,6 +186,7 @@ static int add_worktree(const char *path, const char **child_argv,
 	const char *name;
 	struct stat st;
 	struct child_process cp;
+	struct argv_array child_env = ARGV_ARRAY_INIT;
 	int counter = 0, len, ret;
 	unsigned char rev[20];
 
@@ -256,11 +257,12 @@ static int add_worktree(const char *path, const char **child_argv,
 	fprintf_ln(stderr, _("Enter %s (identifier %s)"), path, name);
 
 	setenv("GIT_CHECKOUT_NEW_WORKTREE", "1", 1);
-	setenv(GIT_DIR_ENVIRONMENT, sb_git.buf, 1);
-	setenv(GIT_WORK_TREE_ENVIRONMENT, path, 1);
+	argv_array_pushf(&child_env, "%s=%s", GIT_DIR_ENVIRONMENT, sb_git.buf);
+	argv_array_pushf(&child_env, "%s=%s", GIT_WORK_TREE_ENVIRONMENT, path);
 	memset(&cp, 0, sizeof(cp));
 	cp.git_cmd = 1;
 	cp.argv = child_argv;
+	cp.env = child_env.argv;
 	ret = run_command(&cp);
 	if (!ret) {
 		is_junk = 0;
@@ -272,6 +274,7 @@ static int add_worktree(const char *path, const char **child_argv,
 	strbuf_reset(&sb);
 	strbuf_addf(&sb, "%s/locked", sb_repo.buf);
 	unlink_or_warn(sb.buf);
+	argv_array_clear(&child_env);
 	strbuf_release(&sb);
 	strbuf_release(&sb_repo);
 	strbuf_release(&sb_git);
-- 
2.5.0.rc2.378.g0af52e8
Previous: Eric SunshineNext: Eric Sunshine
Message 18 of 25 in “rid git-checkout of too-intimate knowledge of new worktree”
  1. 00/20 rid git-checkout of too-intimate knowledge of new worktreeEric Sunshine, Jul 16, 2015
  2. 01/20 checkout: avoid resolving HEAD unnecessarilyEric Sunshine, Jul 16, 2015
  3. 02/20 checkout: name check_linked_checkouts() more meaningfullyEric Sunshine, Jul 16, 2015
  4. 03/20 checkout: improve die_if_checked_out() robustnessEric Sunshine, Jul 16, 2015
  5. 04/20 checkout: die_if_checked_out: simplify strbuf managementEric Sunshine, Jul 16, 2015
  6. 05/20 checkout: generalize die_if_checked_out() branch name argumentEric Sunshine, Jul 16, 2015
  7. 06/20 checkout: check_linked_checkout: improve "already checked out" aestheticEric Sunshine, Jul 16, 2015
  8. Junio C HamanoJul 16, 2015
  9. Eric SunshineJul 17, 2015
  10. Duy NguyenJul 17, 2015
  11. 07/20 checkout: check_linked_checkout: simplify symref parsingEric Sunshine, Jul 16, 2015
  12. 08/20 checkout: teach check_linked_checkout() about symbolic link HEADEric Sunshine, Jul 16, 2015
  13. 09/20 branch: publish die_if_checked_out()Eric Sunshine, Jul 16, 2015
  14. 10/20 worktree: simplify new branch (-b/-B) option checkingEric Sunshine, Jul 16, 2015
  15. 11/20 worktree: introduce options containerEric Sunshine, Jul 16, 2015
  16. 12/20 worktree: make --detach mutually exclusive with -b/-BEric Sunshine, Jul 16, 2015
  17. 13/20 worktree: make branch creation distinct from worktree populationEric Sunshine, Jul 16, 2015
  18. 14/20 worktree: elucidate environment variables intended for child processesEric Sunshine, Jul 16, 2015
  19. 15/20 worktree: add_worktree: construct worktree-population command locallyEric Sunshine, Jul 16, 2015
  20. 16/20 worktree: detect branch-name/detached and error conditions locallyEric Sunshine, Jul 16, 2015
  21. 17/20 worktree: make setup of new HEAD distinct from worktree populationEric Sunshine, Jul 16, 2015
  22. 18/20 worktree: avoid resolving HEAD unnecessarilyEric Sunshine, Jul 16, 2015
  23. 19/20 worktree: populate via "git reset --hard" rather than "git checkout"Eric Sunshine, Jul 16, 2015
  24. 20/20 checkout: drop intimate knowledge of newly created worktreeEric Sunshine, Jul 16, 2015
  25. Junio C HamanoJul 16, 2015

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