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git/t/t2010-checkout-ambiguous.sh
Pierre Habouzit 859fdabaed git-checkout: improve error messages, detect ambiguities.
The patch is twofold: it moves the option consistency checks just under
the parse_options call so that it doesn't get in the way of the tree
reference vs. pathspecs desambiguation.

The other part rewrites the way to understand arguments so that when
git-checkout fails it does with an understandable message. Compared to the
previous behavior we now have:

  - a better error message when doing:

        git checkout <blob reference> --

    now complains about the reference not pointing to a tree, instead of
    things like:

        error: pathspec <blob reference> did not match any file(s) known to git.
        error: pathspec '--' did not match any file(s) known to git.

  - a better error message when doing:

        git checkout <path> --

    It now complains about <path> not being a reference instead of the
    completely obscure:

        error: pathspec '--' did not match any file(s) known to git.

  - an error when -- wasn't used, and the first argument is ambiguous
    (i.e. can be interpreted as both ref and as path).

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-24 23:24:00 -07:00

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#!/bin/sh
test_description='checkout and pathspecs/refspecs ambiguities'
. ./test-lib.sh
test_expect_success 'setup' '
echo hello >world &&
echo hello >all &&
git add all world &&
git commit -m initial &&
git branch world
'
test_expect_success 'reference must be a tree' '
test_must_fail git checkout $(git hash-object ./all) --
'
test_expect_success 'branch switching' '
test "refs/heads/master" = "$(git symbolic-ref HEAD)" &&
git checkout world -- &&
test "refs/heads/world" = "$(git symbolic-ref HEAD)"
'
test_expect_success 'checkout world from the index' '
echo bye > world &&
git checkout -- world &&
git diff --exit-code --quiet
'
test_expect_success 'non ambiguous call' '
git checkout all
'
test_expect_success 'allow the most common case' '
git checkout world &&
test "refs/heads/world" = "$(git symbolic-ref HEAD)"
'
test_expect_success 'check ambiguity' '
test_must_fail git checkout world all
'
test_expect_success 'disambiguate checking out from a tree-ish' '
echo bye > world &&
git checkout world -- world &&
git diff --exit-code --quiet
'
test_done