build: add bundle build

[rhubert]

A bob-bundle collects all scm's neccessary to build a package in a tar-file. Next to the tar-file a bundle-config file is generated to be able to rebuild the package only with the bundle.

Such a bundle can be used to build on a air-gapped system or to archive all sources of a build.

[codecov]

Codecov Report

Attention: Patch coverage is 28.47682% with 108 lines in your changes missing coverage. Please review.

Project coverage is 88.04%. Comparing base (080fc60) to head (5cad406).

Files with missing lines	Patch %	Lines
pym/bob/builder.py	23.07%	60 Missing ⚠️
pym/bob/invoker.py	12.00%	22 Missing ⚠️
pym/bob/scm/git.py	26.92%	19 Missing ⚠️
pym/bob/scm/url.py	57.14%	3 Missing ⚠️
pym/bob/cmds/build/build.py	83.33%	1 Missing ⚠️
pym/bob/scm/cvs.py	66.66%	1 Missing ⚠️
pym/bob/scm/imp.py	66.66%	1 Missing ⚠️
pym/bob/scm/svn.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #585      +/-   ##
==========================================
- Coverage   88.66%   88.04%   -0.62%     
==========================================
  Files          46       46              
  Lines       14860    15003     +143     
==========================================
+ Hits        13176    13210      +34     
- Misses       1684     1793     +109     

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[jkloetzke]

Why closed? I did not look into the details but it at the first glance it sounded like a desirable feature...

[rhubert]

Just to not waste your time. :)

I was caught up by reality shortly after pushing this. The initial idea to bundle only the checkoutScms while still running the checkoutScripts doesn't work for all checkoutScript doing more fetches. (cargo, alire, pip, meson subprojects download ... ). OTOH there are checkoutScripts that might be still needed on the unbundled machine (autoreconf, ...) so this is (as usual) much more complex...

I'm working on an update and will reopen this once I think it might hold a little longer...

[jkloetzke]

Thanks. :)

I think the only reasonable option is to pack the whole source workspace after the checkout step is finished. Very much like the binary artifacts are treated now for package steps. Of course, this will only work for deterministic checkout steps...