[CI] Add GitHub Actions

[Frenzie]

References #443 (comment).

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This change is 

[Frenzie]

At first I figured Travis would be easier (i.e., same config, or so I assumed), but I spent some 10 times as much trying to get that to work and it's refusing to see the repo. GitHub Actions took a couple of minutes.

Edit: just a few minor things remaining in the script.

[Frenzie]

@poire-z Didn't you say something about that JSON stuff no longer being relevant?

[poire-z]

I remember I did (but not really what :)
#383 (comment)

So, it's not used, but it kinda can be some reference (although duplicated with textlang.cpp, but I think we kept them in-sync).
You don't see any reason for the failure ? and/or how to fix it ?

Dunno why, I don't see the github action link/log that I quickly saw earlier this afternoon...
edit: well, logged out, saw the red cross and the link - then logged in again, saw the red cross and the link, working in both cases.

[Frenzie]

You don't see any reason for the failure ? and/or how to fix it ?

It doesn't happen locally for me, so I don't want to spend time on something that I seem to recall you saying wasn't necessary anymore.

[poire-z]

Well, it's a good opportunity to understand the platform pecularities - before we move the more complex frontend :)
From what I see, the languages causing issues are the ones that have a buddy (ie. Latin.pattern + Latin_liturgical.pattern, Portuguese.pattern + Portuguese_BR.pattern).
So, some different sorting behaviour between the file search vs. the json extraction ?

[Frenzie]

This would need some more work to replicate $TRAVIS_COMMIT_RANGE, but it's probably just fine.

[poire-z]

How do I solve this ? :/

$ git checkout master
Switched to branch 'master'
Your branch is up to date with 'origin/master'.

$ git fetch upstream ; git merge upstream/master
remote: Enumerating objects: 10, done.
remote: Counting objects: 100% (10/10), done.
remote: Compressing objects: 100% (4/4), done.
remote: Total 7 (delta 2), reused 3 (delta 0), pack-reused 0
Unpacking objects: 100% (7/7), done.
From https://github.com/koreader/crengine
   b20e7717e..a8c57ac15  master     -> upstream/master
Updating b20e7717e..a8c57ac15
Fast-forward
 .ci/script.sh               |  8 ++++++--
 .github/workflows/build.yml | 19 +++++++++++++++++++
 2 files changed, 25 insertions(+), 2 deletions(-)
 create mode 100644 .github/workflows/build.yml

$ git push origin master
Total 0 (delta 0), reused 0 (delta 0)
To https://github.com/poire-z/crengine.git
 ! [remote rejected]     master -> master (refusing to allow a Personal Access Token to create or update workflow `.github/workflows/build.yml` without `workflow` scope)
error: failed to push some refs to 'https://github.com/poire-z/crengine.git'

[poire-z]

^Just needed to also check [x] Workflow to that personal token I was forced to made some months ago ;)

[Frenzie]

git push -f etc.

[Frenzie]

Sorry, small mobile screen. My bad. No idea.

[poire-z]

It's solved :)

Just needed to also check [x] Workflow to that personal token I was forced to made some months ago ;)