Install external mobans through requires

[chfw]

#35 #86 #87 #88

newsly instroduced "requires":

requires:
   - pypi-mobans-pkg
configuration:
  template_dir:
    - "pypi-mobans-pkg:templates" <-- this is how it is used
    - local
  configuration: config.yml
targets:
  - mytravis.yml: travis.yml.jj2
  - test.txt: demo.txt.jj2

[codecov-io]

Codecov Report

Merging #89 into dev will increase coverage by 0.05%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##              dev     #89      +/-   ##
=========================================
+ Coverage   98.65%   98.7%   +0.05%     
=========================================
  Files          34      34              
  Lines        1484    1545      +61     
=========================================
+ Hits         1464    1525      +61     
  Misses         20      20

Impacted Files	Coverage Δ
moban/copier.py	98.64% <100%> (+0.07%)	⬆️
moban/extensions.py	100% <100%> (ø)	⬆️
tests/test_engine.py	100% <100%> (ø)	⬆️
moban/_version.py	100% <100%> (ø)	⬆️
moban/mobanfile.py	100% <100%> (ø)	⬆️
moban/filters/text.py	100% <100%> (ø)	⬆️
moban/utils.py	97.8% <100%> (+0.1%)	⬆️
moban/constants.py	100% <100%> (ø)	⬆️
tests/test_utils.py	100% <100%> (ø)	⬆️
tests/test_docs.py	100% <100%> (ø)	⬆️
... and 2 more

---

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[jayvdb]

Will requires support git URLs?

while releasing a packaging is nice, it isnt dynamic enough.

we need developers to set up a branch of our mobans repo, and be able to use that moban branch as their upstream while developing in other repos, using that un-merged moban enhancement. Once they have it all working well, we merge the moban enhancement and then they re-push their PR in other repos to use the master of the moban repo.

[chfw]

Yes, It will support git urls. I will think about its require syntax and the checkout location.

[chfw]

With pkg, it is possible to have versions. With git repo, it then,as you said allow dynamic synchronization.

[jayvdb]

Ya, I'm very much in favour of proper packaging, and maybe after coala has finished mobanising this will be possible. testpypi might also be a solution for proposed moban enhancements.

I look forward to seeing this also support git , even if it is very basic and not optimised.

[chfw]

Ok. Please approve this PR and I will submit another one for git