#!/bin/sh

test_description='Test git update-ref error handling'
. ./test-lib.sh

# Create some references, perhaps run pack-refs --all, then try to
# create some more references. Ensure that the second creation fails
# with the correct error message.
# Usage: test_update_rejected <before> <pack> <create> <error>
#   <before> is a ws-separated list of refs to create before the test
#   <pack> (true or false) tells whether to pack the refs before the test
#   <create> is a list of variables to attempt creating
#   <error> is a string to look for in the stderr of update-ref.
# All references are created in the namespace specified by the current
# value of $prefix.
test_update_rejected () {
        before="$1" &&
        pack="$2" &&
        create="$3" &&
        error="$4" &&
        printf "create $prefix/%s $C\n" $before |
        git update-ref --stdin &&
        git for-each-ref $prefix >unchanged &&
        if $pack
        then
                git pack-refs --all
        fi &&
        printf "create $prefix/%s $C\n" $create >input &&
        test_must_fail git update-ref --stdin <input 2>output.err &&
        grep -F "$error" output.err &&
        git for-each-ref $prefix >actual &&
        test_cmp unchanged actual
}

Q="'"

test_expect_success 'setup' '

        git commit --allow-empty -m Initial &&
        C=$(git rev-parse HEAD) &&
        git commit --allow-empty -m Second &&
        D=$(git rev-parse HEAD)

'

test_expect_success 'existing loose ref is a simple prefix of new' '

        prefix=refs/1l &&
        test_update_rejected "a c e" false "b c/x d" \
                "$Q$prefix/c$Q exists; cannot create $Q$prefix/c/x$Q"

'

test_expect_success 'existing packed ref is a simple prefix of new' '

        prefix=refs/1p &&
        test_update_rejected "a c e" true "b c/x d" \
                "$Q$prefix/c$Q exists; cannot create $Q$prefix/c/x$Q"

'

test_expect_success 'existing loose ref is a deeper prefix of new' '

        prefix=refs/2l &&
        test_update_rejected "a c e" false "b c/x/y d" \
                "$Q$prefix/c$Q exists; cannot create $Q$prefix/c/x/y$Q"

'

test_expect_success 'existing packed ref is a deeper prefix of new' '

        prefix=refs/2p &&
        test_update_rejected "a c e" true "b c/x/y d" \
                "$Q$prefix/c$Q exists; cannot create $Q$prefix/c/x/y$Q"

'

test_expect_success 'new ref is a simple prefix of existing loose' '

        prefix=refs/3l &&
        test_update_rejected "a c/x e" false "b c d" \
                "$Q$prefix/c/x$Q exists; cannot create $Q$prefix/c$Q"

'

test_expect_success 'new ref is a simple prefix of existing packed' '

        prefix=refs/3p &&
        test_update_rejected "a c/x e" true "b c d" \
                "$Q$prefix/c/x$Q exists; cannot create $Q$prefix/c$Q"

'

test_expect_success 'new ref is a deeper prefix of existing loose' '

        prefix=refs/4l &&
        test_update_rejected "a c/x/y e" false "b c d" \
                "$Q$prefix/c/x/y$Q exists; cannot create $Q$prefix/c$Q"

'

test_expect_success 'new ref is a deeper prefix of existing packed' '

        prefix=refs/4p &&
        test_update_rejected "a c/x/y e" true "b c d" \
                "$Q$prefix/c/x/y$Q exists; cannot create $Q$prefix/c$Q"

'

test_expect_success 'one new ref is a simple prefix of another' '

        prefix=refs/5 &&
        test_update_rejected "a e" false "b c c/x d" \
                "cannot process $Q$prefix/c$Q and $Q$prefix/c/x$Q at the same time"

'

test_expect_success 'empty directory should not fool rev-parse' '
        prefix=refs/e-rev-parse &&
        git update-ref $prefix/foo $C &&
        git pack-refs --all &&
        mkdir -p .git/$prefix/foo/bar/baz &&
        echo "$C" >expected &&
        git rev-parse $prefix/foo >actual &&
        test_cmp expected actual
'

test_expect_success 'empty directory should not fool for-each-ref' '
        prefix=refs/e-for-each-ref &&
        git update-ref $prefix/foo $C &&
        git for-each-ref $prefix >expected &&
        git pack-refs --all &&
        mkdir -p .git/$prefix/foo/bar/baz &&
        git for-each-ref $prefix >actual &&
        test_cmp expected actual
'

test_expect_success 'empty directory should not fool create' '
        prefix=refs/e-create &&
        mkdir -p .git/$prefix/foo/bar/baz &&
        printf "create %s $C\n" $prefix/foo |
        git update-ref --stdin
'

test_expect_success 'empty directory should not fool verify' '
        prefix=refs/e-verify &&
        git update-ref $prefix/foo $C &&
        git pack-refs --all &&
        mkdir -p .git/$prefix/foo/bar/baz &&
        printf "verify %s $C\n" $prefix/foo |
        git update-ref --stdin
'

test_expect_success 'empty directory should not fool 1-arg update' '
        prefix=refs/e-update-1 &&
        git update-ref $prefix/foo $C &&
        git pack-refs --all &&
        mkdir -p .git/$prefix/foo/bar/baz &&
        printf "update %s $D\n" $prefix/foo |
        git update-ref --stdin
'

test_expect_success 'empty directory should not fool 2-arg update' '
        prefix=refs/e-update-2 &&
        git update-ref $prefix/foo $C &&
        git pack-refs --all &&
        mkdir -p .git/$prefix/foo/bar/baz &&
        printf "update %s $D $C\n" $prefix/foo |
        git update-ref --stdin
'

test_expect_success 'empty directory should not fool 0-arg delete' '
        prefix=refs/e-delete-0 &&
        git update-ref $prefix/foo $C &&
        git pack-refs --all &&
        mkdir -p .git/$prefix/foo/bar/baz &&
        printf "delete %s\n" $prefix/foo |
        git update-ref --stdin
'

test_expect_success 'empty directory should not fool 1-arg delete' '
        prefix=refs/e-delete-1 &&
        git update-ref $prefix/foo $C &&
        git pack-refs --all &&
        mkdir -p .git/$prefix/foo/bar/baz &&
        printf "delete %s $C\n" $prefix/foo |
        git update-ref --stdin
'

test_done