Improve UX when multiple stats-files has compilations with same hash

[lizryzhko]

Describe the bug
If pass additional or multiple stats within StatoscopeWebpackPlugin or cli version, only one of the stats is available in the UI.

To Reproduce
Steps to reproduce the behavior:

1. run npx statoscope generate --input path/to/stats1.json path/to/stats2.json --output path/to/report.html
2. try to choose stats in the report or show diff
3. see that only one of the stats is available

Expected behavior
Both stats1.json and stats2.json are available in the report.

Versions:

• Node (for non-browser bug): v14.16.0
• Browser (for browser-bug): Chrome 91.0.4472.114
• @statoscope/cli: 5.6.2
• @statoscope/webpack-plugin: 5.6.2

[smelukov]

Thanks for the issue.
Are the input files have the same name (but in different directories)?
For example:

statoscope generate --input dir1/stats.json dir2/stats.json --output path/to/report.html

[smelukov]

I've got this behavior only when the input files have the same filename 🤔

[lizryzhko]

Nope, files have different names

[smelukov]

Can you click the "Make report" button (on the top-right panel) please?
How many files do you see there?
It should be something like this

[lizryzhko]

There are 2 files as expected

[smelukov]

There are 2 files as expected

So you should see the "Choose stats" button

and the two stats on the "Diff" page

[lizryzhko]

Nope, while there are two files on the "Make report" page, I can see only one when trying to choose stats:

[smelukov]

Wow :)
That's interesting

[smelukov]

I think that I need your help to deal with it :)
Can you please insert this query into the Make Report page and send me the result?
compilations.({hash})

[lizryzhko]

hmm...

After I added some changes to my project and ran statoscope, I could see two stats in the report 👍

[smelukov]

I think I've got it - the problem appears when you have two same stats, with the same compilation hash
Compilation hash changes only when a bundle changes.
So I think that there must be two stats in the list with some warn message.
I'll fix it

Again, thanks for the issue and for your help )