git/t/t5512-ls-remote.sh
Jeff King 2bc31d1631 refs: support negative transfer.hideRefs
If you hide a hierarchy of refs using the transfer.hideRefs
config, there is no way to later override that config to
"unhide" it. This patch implements a "negative" hide which
causes matches to immediately be marked as unhidden, even if
another match would hide it. We take care to apply the
matches in reverse-order from how they are fed to us by the
config machinery, as that lets our usual "last one wins"
config precedence work (and entries in .git/config, for
example, will override /etc/gitconfig).

So you can now do:

  $ git config --system transfer.hideRefs refs/secret
  $ git config transfer.hideRefs '!refs/secret/not-so-secret'

to hide refs/secret in all repos, except for one public bit
in one specific repo. Or you can even do:

  $ git clone \
      -u "git -c transfer.hiderefs="!refs/foo" upload-pack" \
      remote:repo.git

to clone remote:repo.git, overriding any hiding it has
configured.

There are two alternatives that were considered and
rejected:

  1. A generic config mechanism for removing an item from a
     list. E.g.: (e.g., "[transfer] hideRefs -= refs/foo").

     This is nice because it could apply to other
     multi-valued config, as well. But it is not nearly as
     flexible. There is no way to say:

       [transfer]
       hideRefs = refs/secret
       hideRefs = refs/secret/not-so-secret

     Having explicit negative specifications means we can
     override previous entries, even if they are not the
     same literal string.

  2. Adding another variable to override some parts of
     hideRefs (e.g., "exposeRefs").

     This solves the problem from alternative (1), but it
     cannot easily obey the normal config precedence,
     because it would use two separate lists. For example:

       [transfer]
       hideRefs = refs/secret
       exposeRefs = refs/secret/not-so-secret
       hideRefs = refs/secret/not-so-secret/no-really-its-secret

     With two lists, we have to apply the "expose" rules
     first, and only then apply the "hide" rules. But that
     does not match what the above config intends.

     Of course we could internally parse that to a single
     list, respecting the ordering, which saves us having to
     invent the new "!" syntax. But using a single name
     communicates to the user that the ordering _is_
     important. And "!" is well-known for negation, and
     should not appear at the beginning of a ref (it is
     actually valid in a ref-name, but all entries here
     should be fully-qualified, starting with "refs/").

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-07 11:47:36 -07:00

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#!/bin/sh
test_description='git ls-remote'
. ./test-lib.sh
test_expect_success setup '
>file &&
git add file &&
test_tick &&
git commit -m initial &&
git tag mark &&
git show-ref --tags -d | sed -e "s/ / /" >expected.tag &&
(
echo "$(git rev-parse HEAD) HEAD"
git show-ref -d | sed -e "s/ / /"
) >expected.all &&
git remote add self "$(pwd)/.git"
'
test_expect_success 'ls-remote --tags .git' '
git ls-remote --tags .git >actual &&
test_cmp expected.tag actual
'
test_expect_success 'ls-remote .git' '
git ls-remote .git >actual &&
test_cmp expected.all actual
'
test_expect_success 'ls-remote --tags self' '
git ls-remote --tags self >actual &&
test_cmp expected.tag actual
'
test_expect_success 'ls-remote self' '
git ls-remote self >actual &&
test_cmp expected.all actual
'
test_expect_success 'dies when no remote specified and no default remotes found' '
test_must_fail git ls-remote
'
test_expect_success 'use "origin" when no remote specified' '
URL="$(pwd)/.git" &&
echo "From $URL" >exp_err &&
git remote add origin "$URL" &&
git ls-remote 2>actual_err >actual &&
test_cmp exp_err actual_err &&
test_cmp expected.all actual
'
test_expect_success 'suppress "From <url>" with -q' '
git ls-remote -q 2>actual_err &&
test_must_fail test_cmp exp_err actual_err
'
test_expect_success 'use branch.<name>.remote if possible' '
#
# Test that we are indeed using branch.<name>.remote, not "origin", even
# though the "origin" remote has been set.
#
# setup a new remote to differentiate from "origin"
git clone . other.git &&
(
cd other.git &&
echo "$(git rev-parse HEAD) HEAD"
git show-ref | sed -e "s/ / /"
) >exp &&
URL="other.git" &&
echo "From $URL" >exp_err &&
git remote add other $URL &&
git config branch.master.remote other &&
git ls-remote 2>actual_err >actual &&
test_cmp exp_err actual_err &&
test_cmp exp actual
'
test_expect_success 'confuses pattern as remote when no remote specified' '
cat >exp <<-\EOF &&
fatal: '\''refs*master'\'' does not appear to be a git repository
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
EOF
#
# Do not expect "git ls-remote <pattern>" to work; ls-remote needs
# <remote> if you want to feed <pattern>, just like you cannot say
# fetch <branch>.
# We could just as easily have used "master"; the "*" emphasizes its
# role as a pattern.
test_must_fail git ls-remote refs*master >actual 2>&1 &&
test_cmp exp actual
'
test_expect_success 'die with non-2 for wrong repository even with --exit-code' '
{
git ls-remote --exit-code ./no-such-repository
status=$?
} &&
test $status != 2 && test $status != 0
'
test_expect_success 'Report success even when nothing matches' '
git ls-remote other.git "refs/nsn/*" >actual &&
>expect &&
test_cmp expect actual
'
test_expect_success 'Report no-match with --exit-code' '
test_expect_code 2 git ls-remote --exit-code other.git "refs/nsn/*" >actual &&
>expect &&
test_cmp expect actual
'
test_expect_success 'Report match with --exit-code' '
git ls-remote --exit-code other.git "refs/tags/*" >actual &&
git ls-remote . tags/mark >expect &&
test_cmp expect actual
'
test_expect_success 'set up some extra tags for ref hiding' '
git tag magic/one &&
git tag magic/two
'
for configsection in transfer uploadpack
do
test_expect_success "Hide some refs with $configsection.hiderefs" '
test_config $configsection.hiderefs refs/tags &&
git ls-remote . >actual &&
test_unconfig $configsection.hiderefs &&
git ls-remote . |
sed -e "/ refs\/tags\//d" >expect &&
test_cmp expect actual
'
test_expect_success "Override hiding of $configsection.hiderefs" '
test_when_finished "test_unconfig $configsection.hiderefs" &&
git config --add $configsection.hiderefs refs/tags &&
git config --add $configsection.hiderefs "!refs/tags/magic" &&
git config --add $configsection.hiderefs refs/tags/magic/one &&
git ls-remote . >actual &&
grep refs/tags/magic/two actual &&
! grep refs/tags/magic/one actual
'
done
test_expect_success 'overrides work between mixed transfer/upload-pack hideRefs' '
test_config uploadpack.hiderefs refs/tags &&
test_config transfer.hiderefs "!refs/tags/magic" &&
git ls-remote . >actual &&
grep refs/tags/magic actual
'
test_done