chore: add version script to all packages

[dyladan]

Which problem is this PR solving?

• Fixes Reading version inside code #600

Short description of the changes

• Add a script which runs on compile to all packages that adds a version.ts file to the base of every package.

[dyladan]

Created this PR to simplify the tracer registry PR which is growing quite large

[codecov-io]

Codecov Report

Merging #651 into master will decrease coverage by 0.15%.
The diff coverage is 19.23%.

@@            Coverage Diff             @@
##           master     #651      +/-   ##
==========================================
- Coverage   89.93%   89.77%   -0.16%     
==========================================
  Files         191      213      +22     
  Lines       10182    10103      -79     
  Branches      928      929       +1     
==========================================
- Hits         9157     9070      -87     
- Misses       1025     1033       +8

Impacted Files	Coverage Δ
packages/opentelemetry-base/src/version.ts	0% <ø> (ø)
...ges/opentelemetry-scope-async-hooks/src/version.ts	0% <0%> (ø)
packages/opentelemetry-plugin-dns/src/version.ts	0% <0%> (ø)
...kages/opentelemetry-exporter-jaeger/src/version.ts	0% <0%> (ø)
...s/opentelemetry-plugin-mongodb-core/src/version.ts	0% <0%> (ø)
packages/opentelemetry-web/src/version.ts	0% <0%> (ø)
packages/opentelemetry-plugin-http/src/version.ts	0% <0%> (ø)
packages/opentelemetry-plugin-https/src/version.ts	0% <0%> (ø)
packages/opentelemetry-plugin-redis/src/version.ts	0% <0%> (ø)
packages/opentelemetry-metrics/src/version.ts	0% <0%> (ø)
... and 61 more

[vmarchaud]

LGMT, however i believe it would be easier to maintain if we add a scripts folder at the root of the repo

[dyladan]

@vmarchaud I moved the version script to the root. Definitely agree this makes it easier to maintain.

[dyladan]

@open-telemetry/javascript-approvers

This is blocking #582 so I would appreciate it if we could get this in fairly quickly. It's a pretty simple change and most of the files are autogenerated.

[dyladan]

@obecny can you take a look when you get a moment. Since this was initially an issue you made and you wrote the original implementation for core, I feel like I need your feedback before I can merge this.

[obecny]

can you please add version:update in main lerna so it can be run from main folder once for all ?

I was thinking about adding a test to check if all version files were regenerated correctly to be run on circleCi. The main reason for that is that it might be forgotten to regenerate it before commit (happened already).
This could be achieved probably by one bash script, which will check git changes before , run version:update and check if any changes has been done. But that was just the idea and can be done in separate PR.

Other than that lgtm.

[dyladan]

can you please add version:update in main lerna so it can be run from main folder once for all ?

yep no problem

I was thinking about adding a test to check if all version files were regenerated correctly to be run on circleCi. The main reason for that is that it might be forgotten to regenerate it before commit (happened already).

Is it easier to do that, or just make a preversion script in each package.json? Agree this can be a separate PR

[mayurkale22]

lgtm