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-rwxr-xr-xt/t5582-fetch-negative-refspec.sh240
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diff --git a/t/t5582-fetch-negative-refspec.sh b/t/t5582-fetch-negative-refspec.sh
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+#!/bin/sh
+# Copyright (c) 2020, Jacob Keller.
+
+test_description='"git fetch" with negative refspecs.
+
+'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+ echo >file original &&
+ git add file &&
+ git commit -a -m original
+'
+
+test_expect_success "clone and setup child repos" '
+ git clone . one &&
+ (
+ cd one &&
+ echo >file updated by one &&
+ git commit -a -m "updated by one" &&
+ git switch -c alternate &&
+ echo >file updated again by one &&
+ git commit -a -m "updated by one again" &&
+ git switch master
+ ) &&
+ git clone . two &&
+ (
+ cd two &&
+ git config branch.master.remote one &&
+ git config remote.one.url ../one/.git/ &&
+ git config remote.one.fetch +refs/heads/*:refs/remotes/one/* &&
+ git config --add remote.one.fetch ^refs/heads/alternate
+ ) &&
+ git clone . three
+'
+
+test_expect_success "fetch one" '
+ echo >file updated by origin &&
+ git commit -a -m "updated by origin" &&
+ (
+ cd two &&
+ test_must_fail git rev-parse --verify refs/remotes/one/alternate &&
+ git fetch one &&
+ test_must_fail git rev-parse --verify refs/remotes/one/alternate &&
+ git rev-parse --verify refs/remotes/one/master &&
+ mine=$(git rev-parse refs/remotes/one/master) &&
+ his=$(cd ../one && git rev-parse refs/heads/master) &&
+ test "z$mine" = "z$his"
+ )
+'
+
+test_expect_success "fetch with negative refspec on commandline" '
+ echo >file updated by origin again &&
+ git commit -a -m "updated by origin again" &&
+ (
+ cd three &&
+ alternate_in_one=$(cd ../one && git rev-parse refs/heads/alternate) &&
+ echo $alternate_in_one >expect &&
+ git fetch ../one/.git refs/heads/*:refs/remotes/one/* ^refs/heads/master &&
+ cut -f -1 .git/FETCH_HEAD >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success "fetch with negative sha1 refspec fails" '
+ echo >file updated by origin yet again &&
+ git commit -a -m "updated by origin yet again" &&
+ (
+ cd three &&
+ master_in_one=$(cd ../one && git rev-parse refs/heads/master) &&
+ test_must_fail git fetch ../one/.git refs/heads/*:refs/remotes/one/* ^$master_in_one
+ )
+'
+
+test_expect_success "fetch with negative pattern refspec" '
+ echo >file updated by origin once more &&
+ git commit -a -m "updated by origin once more" &&
+ (
+ cd three &&
+ alternate_in_one=$(cd ../one && git rev-parse refs/heads/alternate) &&
+ echo $alternate_in_one >expect &&
+ git fetch ../one/.git refs/heads/*:refs/remotes/one/* ^refs/heads/m* &&
+ cut -f -1 .git/FETCH_HEAD >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success "fetch with negative pattern refspec does not expand prefix" '
+ echo >file updated by origin another time &&
+ git commit -a -m "updated by origin another time" &&
+ (
+ cd three &&
+ alternate_in_one=$(cd ../one && git rev-parse refs/heads/alternate) &&
+ master_in_one=$(cd ../one && git rev-parse refs/heads/master) &&
+ echo $alternate_in_one >expect &&
+ echo $master_in_one >>expect &&
+ git fetch ../one/.git refs/heads/*:refs/remotes/one/* ^master &&
+ cut -f -1 .git/FETCH_HEAD >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success "fetch with negative refspec avoids duplicate conflict" '
+ cd "$D" &&
+ (
+ cd one &&
+ git branch dups/a &&
+ git branch dups/b &&
+ git branch dups/c &&
+ git branch other/a &&
+ git rev-parse --verify refs/heads/other/a >../expect &&
+ git rev-parse --verify refs/heads/dups/b >>../expect &&
+ git rev-parse --verify refs/heads/dups/c >>../expect
+ ) &&
+ (
+ cd three &&
+ git fetch ../one/.git ^refs/heads/dups/a refs/heads/dups/*:refs/dups/* refs/heads/other/a:refs/dups/a &&
+ git rev-parse --verify refs/dups/a >../actual &&
+ git rev-parse --verify refs/dups/b >>../actual &&
+ git rev-parse --verify refs/dups/c >>../actual
+ ) &&
+ test_cmp expect actual
+'
+
+test_expect_success "push --prune with negative refspec" '
+ (
+ cd two &&
+ git branch prune/a &&
+ git branch prune/b &&
+ git branch prune/c &&
+ git push ../three refs/heads/prune/* &&
+ git branch -d prune/a &&
+ git branch -d prune/b &&
+ git push --prune ../three refs/heads/prune/* ^refs/heads/prune/b
+ ) &&
+ (
+ cd three &&
+ test_write_lines b c >expect &&
+ git for-each-ref --format="%(refname:lstrip=3)" refs/heads/prune/ >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success "push --prune with negative refspec apply to the destination" '
+ (
+ cd two &&
+ git branch ours/a &&
+ git branch ours/b &&
+ git branch ours/c &&
+ git push ../three refs/heads/ours/*:refs/heads/theirs/* &&
+ git branch -d ours/a &&
+ git branch -d ours/b &&
+ git push --prune ../three refs/heads/ours/*:refs/heads/theirs/* ^refs/heads/theirs/b
+ ) &&
+ (
+ cd three &&
+ test_write_lines b c >expect &&
+ git for-each-ref --format="%(refname:lstrip=3)" refs/heads/theirs/ >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success "fetch --prune with negative refspec" '
+ (
+ cd two &&
+ git branch fetch/a &&
+ git branch fetch/b &&
+ git branch fetch/c
+ ) &&
+ (
+ cd three &&
+ git fetch ../two/.git refs/heads/fetch/*:refs/heads/copied/*
+ ) &&
+ (
+ cd two &&
+ git branch -d fetch/a &&
+ git branch -d fetch/b
+ ) &&
+ (
+ cd three &&
+ test_write_lines b c >expect &&
+ git fetch -v ../two/.git --prune refs/heads/fetch/*:refs/heads/copied/* ^refs/heads/fetch/b &&
+ git for-each-ref --format="%(refname:lstrip=3)" refs/heads/copied/ >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success "push with matching : and negative refspec" '
+ # Manually handle cleanup, since test_config is not
+ # prepared to take arbitrary options like --add
+ test_when_finished "test_unconfig -C two remote.one.push" &&
+
+ # For convenience, we use "master" to refer to the name of
+ # the branch created by default in the following.
+ #
+ # Repositories two and one have branches other than "master"
+ # but they have no overlap---"master" is the only one that
+ # is shared between them. And the master branch at two is
+ # behind the master branch at one by one commit.
+ git -C two config --add remote.one.push : &&
+
+ # A matching push tries to update master, fails due to non-ff
+ test_must_fail git -C two push one &&
+
+ # "master" may actually not be "master"---find it out.
+ current=$(git symbolic-ref HEAD) &&
+
+ # If master is in negative refspec, then the command will not attempt
+ # to push and succeed.
+ git -C two config --add remote.one.push "^$current" &&
+
+ # With "master" excluded, this push is a no-op. Nothing gets
+ # pushed and it succeeds.
+ git -C two push -v one
+'
+
+test_expect_success "push with matching +: and negative refspec" '
+ test_when_finished "test_unconfig -C two remote.one.push" &&
+
+ # The same set-up as above, whose side-effect was a no-op.
+ git -C two config --add remote.one.push +: &&
+
+ # The push refuses to update the "master" branch that is checked
+ # out in the "one" repository, even when it is forced with +:
+ test_must_fail git -C two push one &&
+
+ # "master" may actually not be "master"---find it out.
+ current=$(git symbolic-ref HEAD) &&
+
+ # If master is in negative refspec, then the command will not attempt
+ # to push and succeed
+ git -C two config --add remote.one.push "^$current" &&
+
+ # With "master" excluded, this push is a no-op. Nothing gets
+ # pushed and it succeeds.
+ git -C two push -v one
+'
+
+test_done