Improve support for long build traces

UX: @dimitrieh FE: @filipa

We recently merged: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10336.

It works great. However, we need a few tweaks by looking at: https://dev.gitlab.org/gitlab/gitlabhq/builds/1000361.

1. Change LIMIT_SIZE to 500 KiB, 50 seems too small,
2. Add to truncate message a link to raw: raw_namespace_project_build_path(@project.namespace, @project, @build),
3. Fix message: currently, we show amount in KiB and we get .size from json which is in bytes. This data should be formatted by the frontend. It seems that it is fine now to divide .size/1024 now,
4. Update amount of data presented when we receive next jsons with size. Currently, our flow is to show the message if !append which is correct. However, we should update truncated size with every received .json,
5. Improve limiting on the backend, to skip to next new line (Stretch).

Design

• making the line opaque (no opacity)
• link to complete trace also in line in build log

added feature proposal label

@markglenfletcher this is not a new feature, these are leftovers from a %9.1 deliverable

removed feature proposal label

@ayufan can you confirm the following:

• Change LIMIT_SIZE to 500 KiB, 50 seems too small,

This one is backend, correct?

• Add to truncate message a link to raw: raw_namespace_project_build_path(@project.namespace, @project, @build),

This one is ~Frontend

• Fix message: currently, we show amount in KiB and we get .size from json which is in bytes. This data should be formatted by the frontend. It seems that it is fine now to divide .size/1024 now,

This one is ~Frontend

• Update amount of data presented when we receive next jsons with size. Currently, our flow is to show the message if !append which is correct. However, we should update truncated size with every received .json

This one is backend, correct?

added frontend ~901060 labels

@filipa

First is correct. You can also just change the constant when you touch that code.

Rest is ~Frontend as all data is already sent to API.

added regression label

@filipa

• making the line opaque (no opacity)
• if possible, make the log container it self scrollable
• link to complete trace also in line in build log

added ~974571 label

mentioned in merge request !10660 (merged)

closed via merge request !10660 (merged)

mentioned in commit 435e4090