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add: error appropriately on repository with no commits

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The previous commit made 'git add' abort when given a repository that
doesn't have a commit checked out.  However, the output upon failure
isn't appropriate:

  % git add repo
  warning: adding embedded git repository: repo
  hint: You've added another git repository inside your current repository.
  hint: [...]
  error: unable to index file 'repo/'
  fatal: adding files failed

The hint doesn't apply in this case, and the error message doesn't
tell the user why 'repo' couldn't be added to the index.

Provide better output by teaching add_to_index() to error when given a
git directory where HEAD can't be resolved.  To avoid the embedded
repository warning and hint, call check_embedded_repo() only after
add_file_to_index() succeeds because, in general, its output doesn't
make sense if adding to the index fails.

Signed-off-by: Kyle Meyer <kyle@kyleam.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Kyle Meyer
2019-04-09 19:07:37 -04:00
committed by Junio C Hamano
parent b22827045e
commit f937bc2f86
3 changed files with 16 additions and 1 deletions
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11
t/t3700-add.sh
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@ -296,6 +296,17 @@ test_expect_success '"git add ." in empty repo' '
)
'
test_expect_success 'error on a repository with no commits' '
rm -fr empty &&
git init empty &&
test_must_fail git add empty >actual 2>&1 &&
cat >expect <<-EOF &&
error: '"'empty/'"' does not have a commit checked out
fatal: adding files failed
EOF
test_i18ncmp expect actual
'
test_expect_success 'git add --dry-run of existing changed file' "
echo new >>track-this &&
git add --dry-run track-this >actual 2>&1 &&