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[PATCH v2 7/9] completion: improve handling of --track in switch/checkout

From
Jacob Keller <jacob.e.keller@intel.com>
Date
May 27, 2020, 11:38 UTC
Message-ID
<20200527113831.3294409-8-jacob.e.keller@intel.com>
In-Reply-To
<20200527113831.3294409-1-jacob.e.keller@intel.com>
From: Jacob Keller <jacob.keller@gmail.com>

Current completion for the --track option of git switch and git checkout is sub par. In addition to the DWIM logic of a bare branch name, --track has DWIM logic to convert specified remote/branch names into a local branch tracking that remote. For example

  $git switch --track origin/master

This will create a local branch name master, that tracks the master branch of the origin remote.

In fact, git switch --track on its own will not accept other forms of references. These must instead be specified manually via the -c/-C/-b/-B options.

Introduce __git_remote_heads() and the "remote-heads" mode for __git_complete_refs. Use this when the --track option is provided while completing in _git_switch and _git_checkout. Just as in the --detach case, we never enable DWIM mode for --track, because it doesn't make sense.

It should be noted that completion support is still a bit sub par when it comes to handling -c/-C and --orphan. This will be resolved in a future change.

Signed-off-by: Jacob Keller <jacob.keller@gmail.com>
---
 contrib/completion/git-completion.bash | 24 +++++++++++++++++--
 t/t9902-completion.sh                  | 32 ++++++++++++++++++++++++++
 2 files changed, 54 insertions(+), 2 deletions(-)
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 38b5a5a0d874..4cdf09987725 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -624,6 +624,19 @@ __git_heads ()
 			"refs/heads/$cur_*" "refs/heads/$cur_*/**"
 }
 
+# Lists branches from remote repositories.
+# 1: A prefix to be added to each listed branch (optional).
+# 2: List only branches matching this word (optional; list all branches if
+#    unset or empty).
+# 3: A suffix to be appended to each listed branch (optional).
+__git_remote_heads ()
+{
+	local pfx="${1-}" cur_="${2-}" sfx="${3-}"
+
+	__git for-each-ref --format="${pfx//\%/%%}%(refname:strip=2)$sfx" \
+			"refs/remotes/$cur_*" "refs/remotes/$cur_*/**"
+}
+
 # Lists tags from the local repository.
 # Accepts the same positional parameters as __git_heads() above.
 __git_tags ()
@@ -783,8 +796,9 @@ __git_refs ()
 # --sfx=<suffix>: A suffix to be appended to each ref instead of the default
 #                 space.
 # --mode=<mode>: What set of refs to complete, one of 'refs' (the default) to
-#                complete all refs, 'heads' to complete only branches. Note
-#                that --remote is only compatible with --mode=refs.
+#                complete all refs, 'heads' to complete only branches, or
+#                'remote-heads' to complete only remote branches. Note that
+#                --remote is only compatible with --mode=refs.
 __git_complete_refs ()
 {
 	local remote dwim pfx cur_="$cur" sfx=" " mode="refs"
@@ -810,6 +824,8 @@ __git_complete_refs ()
 			__gitcomp_direct "$(__git_refs "$remote" "" "$pfx" "$cur_" "$sfx")" ;;
 		heads)
 			__gitcomp_direct "$(__git_heads "$pfx" "$cur_" "$sfx")" ;;
+		remote-heads)
+			__gitcomp_direct "$(__git_remote_heads "$pfx" "$cur_" "$sfx")" ;;
 		*)
 			return 1 ;;
 	esac
@@ -1492,6 +1508,8 @@ _git_checkout ()
 
 		if [ -n "$(__git_find_on_cmdline "-d --detach")" ]; then
 			__git_complete_refs --mode="refs"
+		elif [ -n "$(__git_find_on_cmdline "--track")" ]; then
+			__git_complete_refs --mode="remote-heads"
 		else
 			__git_complete_refs $dwim_opt --mode="refs"
 		fi
@@ -2347,6 +2365,8 @@ _git_switch ()
 
 		if [ -n "$(__git_find_on_cmdline "-d --detach")" ]; then
 			__git_complete_refs --mode="refs"
+		elif [ -n "$(__git_find_on_cmdline "--track")" ]; then
+			__git_complete_refs --mode="remote-heads"
 		else
 			__git_complete_refs $dwim_opt --mode="heads"
 		fi
diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
index 5b1868e43632..b09eb498d175 100755
--- a/t/t9902-completion.sh
+++ b/t/t9902-completion.sh
@@ -1404,6 +1404,38 @@ test_expect_success 'git checkout - with -d, complete only references' '
 	EOF
 '
 
+test_expect_success 'git switch - with --track, complete only remote branches' '
+	test_completion "git switch --track " <<-\EOF
+	other/branch-in-other Z
+	other/master-in-other Z
+	EOF
+'
+
+test_expect_success 'git checkout - with --track, complete only remote branches' '
+	test_completion "git checkout --track " <<-\EOF
+	other/branch-in-other Z
+	other/master-in-other Z
+	EOF
+'
+
+test_expect_success 'git switch - with --no-track, complete only local branch names' '
+	test_completion "git switch --no-track " <<-\EOF
+	master Z
+	matching-branch Z
+	EOF
+'
+
+test_expect_success 'git checkout - with --no-track, complete only local references' '
+	test_completion "git checkout --no-track " <<-\EOF
+	HEAD Z
+	master Z
+	matching-branch Z
+	matching-tag Z
+	other/branch-in-other Z
+	other/master-in-other Z
+	EOF
+'
+
 test_expect_success 'teardown after ref completion' '
 	git branch -d matching-branch &&
 	git tag -d matching-tag &&
-- 
2.25.2
Previous: Jacob Keller
Message 13 of 13 in “refactor completion for switch and checkout”
  1. 0/9 refactor completion for switch and checkoutJacob Keller, May 27, 2020
  2. 4/9 completion: perform DWIM logic directly in __git_complete_refsJacob Keller, May 27, 2020
  3. 9/9 completion: improve handling of --orphan option of switch/checkoutJacob Keller, May 27, 2020
  4. 8/9 completion: improve handling of -c/-C and -b/-B in switch/checkoutJacob Keller, May 27, 2020
  5. 3/9 completion: extract function __git_dwim_remote_headsJacob Keller, May 27, 2020
  6. 6/9 completion: improve handling of --detach in checkoutJacob Keller, May 27, 2020
  7. 2/9 completion: improve handling of DWIM mode for switch/checkoutJacob Keller, May 27, 2020
  8. Junio C HamanoMay 27, 2020
  9. Jacob KellerMay 27, 2020
  10. Jacob KellerMay 28, 2020
  11. 1/9 completion: replace overloaded track term for __git_complete_refsJacob Keller, May 27, 2020
  12. 5/9 completion: improve completion for git switch with no optionsJacob Keller, May 27, 2020
  13. 7/9 completion: improve handling of --track in switch/checkoutJacob Keller, May 27, 2020

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