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tracking branches: add advice to ambiguous refspec error

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The error "not tracking: ambiguous information for ref" is raised
when we are evaluating what tracking information to set on a branch,
and find that the ref to be added as tracking branch is mapped
under multiple remotes' fetch refspecs.

This can easily happen when a user copy-pastes a remote definition
in their git config, and forgets to change the tracking path.

Add advice in this situation, explicitly highlighting which remotes
are involved and suggesting how to correct the situation. Also
update a test to explicitly expect that advice.

Signed-off-by: Tao Klerks <tao@klerks.biz>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Tao Klerks
2022-04-01 06:05:13 +00:00
committed by Junio C Hamano
parent abf474a5dd
commit e4921d877a
5 changed files with 78 additions and 9 deletions
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18
t/t3200-branch.sh
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@@ -1039,13 +1039,27 @@ test_expect_success 'checkout -b with -l makes reflog when core.logAllRefUpdates
git rev-parse --verify gamma@{0}
'
test_expect_success 'avoid ambiguous track' '
test_expect_success 'avoid ambiguous track and advise' '
git config branch.autosetupmerge true &&
git config remote.ambi1.url lalala &&
git config remote.ambi1.fetch refs/heads/lalala:refs/heads/main &&
git config remote.ambi2.url lilili &&
git config remote.ambi2.fetch refs/heads/lilili:refs/heads/main &&
test_must_fail git branch all1 main &&
cat <<-EOF >expected &&
fatal: not tracking: ambiguous information for ref '\''refs/heads/main'\''
hint: There are multiple remotes whose fetch refspecs map to the remote
hint: tracking ref '\''refs/heads/main'\'':
hint: ambi1
hint: ambi2
hint: ''
hint: This is typically a configuration error.
hint: ''
hint: To support setting up tracking branches, ensure that
hint: different remotes'\'' fetch refspecs map into different
hint: tracking namespaces.
EOF
test_must_fail git branch all1 main 2>actual &&
test_cmp expected actual &&
test -z "$(git config branch.all1.merge)"
'