Commit 75ed0e27 authored by Robert Speicher's avatar Robert Speicher

Merge branch '21247-mergerequestscontroller-conflicts-may-fail-with-iso-8859-data' into 'master'

Handle non-UTF-8 conflicts gracefully

## What does this MR do?

If a conflict file isn't in a UTF-8-compatible encoding, we can't resolve it in the UI.

## What are the relevant issue numbers?

Closes #21247. 

See merge request !5961
parents 2933f3f5 44eb3197
......@@ -26,6 +26,9 @@ v 8.11.2
- Don't show resolve conflicts link before MR status is updated
- Don't prevent viewing the MR when git refs for conflicts can't be found on disk
v 8.11.3 (unreleased)
- Don't try to show merge conflict resolution info if a merge conflict contains non-UTF-8 characters
v 8.11.2 (unreleased)
- Show "Create Merge Request" widget for push events to fork projects on the source project
......
......@@ -26,6 +26,7 @@ this is similar to performing `git checkout feature; git merge master` locally.
GitLab allows resolving conflicts in a file where all of the below are true:
- The file is text, not binary
- The file is in a UTF-8 compatible encoding
- The file does not already contain conflict markers
- The file, with conflict markers added, is not over 200 KB in size
- The file exists under the same path in both branches
......
......@@ -13,10 +13,19 @@ module Gitlab
class UnmergeableFile < ParserError
end
class UnsupportedEncoding < ParserError
end
def parse(text, our_path:, their_path:, parent_file: nil)
raise UnmergeableFile if text.blank? # Typically a binary file
raise UnmergeableFile if text.length > 102400
begin
text.to_json
rescue Encoding::UndefinedConversionError
raise UnsupportedEncoding
end
line_obj_index = 0
line_old = 1
line_new = 1
......
......@@ -43,7 +43,8 @@ feature 'Merge request conflict resolution', js: true, feature: true do
'conflict-too-large' => 'when the conflicts contain a large file',
'conflict-binary-file' => 'when the conflicts contain a binary file',
'conflict-contains-conflict-markers' => 'when the conflicts contain a file with ambiguous conflict markers',
'conflict-missing-side' => 'when the conflicts contain a file edited in one branch and deleted in another'
'conflict-missing-side' => 'when the conflicts contain a file edited in one branch and deleted in another',
'conflict-non-utf8' => 'when the conflicts contain a non-UTF-8 file',
}
UNRESOLVABLE_CONFLICTS.each do |source_branch, description|
......
......@@ -183,6 +183,11 @@ CONFLICT
expect { parse_text('a' * 102401) }.
to raise_error(Gitlab::Conflict::Parser::UnmergeableFile)
end
it 'raises UnsupportedEncoding when the file contains non-UTF-8 characters' do
expect { parse_text("a\xC4\xFC".force_encoding(Encoding::ASCII_8BIT)) }.
to raise_error(Gitlab::Conflict::Parser::UnsupportedEncoding)
end
end
end
end
......@@ -24,11 +24,12 @@ module TestEnv
'expand-collapse-lines' => '238e82d',
'video' => '8879059',
'crlf-diff' => '5938907',
'conflict-start' => '14fa46b',
'conflict-start' => '75284c7',
'conflict-resolvable' => '1450cd6',
'conflict-binary-file' => '259a6fb',
'conflict-contains-conflict-markers' => '5e0964c',
'conflict-missing-side' => 'eb227b3',
'conflict-non-utf8' => 'd0a293c',
'conflict-too-large' => '39fa04f',
}
......
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