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Merge branch 'osw-update-diff-docs-on-where-limits-are-used' into 'master'

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Update diff docs regarding where limits are applied

See merge request gitlab-org/gitlab-ce!21504
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Douwe Maan 2018-09-05 11:11:20 +00:00
commit f897537d2d
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@ -95,6 +95,8 @@ Gitlab::Git::DiffCollection.collection_limits[:max_bytes] = Gitlab::Git::DiffCol
No more files will be rendered at all if 5 megabytes have already been rendered.
*Note:* All collection limit parameters are currently sent and applied on Gitaly. That is, once the limit is surpassed,
Gitaly will only return the safe amount of data to be persisted on `merge_request_diff_files`.
### Individual diff file limits
@ -106,12 +108,17 @@ Gitlab::Git::Diff::COLLAPSE_LIMIT = 10.kilobytes
File diff will be collapsed (but be expandable) if it is larger than 10 kilobytes.
*Note:* Although this nomenclature (Collapsing) is also used on Gitaly, this limit is only used on GitLab (hardcoded - not sent to Gitaly).
Gitaly will only return `Diff.Collapsed` (RPC) when surpassing collection limits.
```ruby
Gitlab::Git::Diff::SIZE_LIMIT = 100.kilobytes
```
File diff will not be rendered if it's larger than 100 kilobytes.
*Note:* This limit is currently hardcoded and applied on Gitaly and the RPC returns `Diff.TooLarge` when this limit is surpassed.
Although we're still also applying it on GitLab, we should remove the redundancy from GitLab once we're confident with the Gitaly integration.
```ruby
Commit::DIFF_SAFE_LINES = Gitlab::Git::DiffCollection::DEFAULT_LIMITS[:max_lines] = 5000
@ -119,6 +126,8 @@ Commit::DIFF_SAFE_LINES = Gitlab::Git::DiffCollection::DEFAULT_LIMITS[:max_lines
File diff will be suppressed (technically different from collapsed, but behaves the same, and is expandable) if it has more than 5000 lines.
*Note:* This limit is currently hardcoded and only applied on GitLab.
## Viewers
Diff Viewers, which can be found on `models/diff_viewer/*` are classes used to map metadata about each type of Diff File. It has information