Setup an actual build system

[ISNIT0]

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[kelson42]

@midik I see that we have a CI running with TravisCI... not sure what is then to be done! What is tested exactly? Do you see something essential missing?

[midik]

@kelson42
yes, we run build with Travis. However, I think it doesn't make sense as it currently implemented. In fact, we only run tsc checking only if index.ts is able to build, and nothing more. Since we have tslint while developing, tsc will never fail again :)
Considering this as a kind of functional test, I think we could check that all major steps (npm scripts) run without errors. For example, we could run the chain for a single language and couple of sims then dump zim file and check that content is correct somehow.

[kelson42]

@midik This sounds good, but we can not make a full run. This would be too long. Therefore we need to make a subset, maybe only one small language?

[midik]

yes, that's exactly I mean and that's how I'm testing it locally. One (or two) languages and just subset of sims (using slice())

[midik]

also, we could test against running docker build, if it's meaningful for us at this point (but it would take a really long time)

[kelson42]

Not in favour to run docker build, not so pertinent IMO.

[midik]

still debugging

$ npm run export -- --mulOnly
> phetscraper@1.0.0 export /home/travis/build/openzim/phet
> npm run export-prebuild && node --no-warnings --max-old-space-size=8192 node_modules/ts-node/dist/bin.js steps/export.ts "--mulOnly"
> phetscraper@1.0.0 export-prebuild /home/travis/build/openzim/phet
> npm run build && node_modules/browserify/bin/cmd.js res/js/index.js -t babelify --presets [es2015] -o res/js/dist.js
> phetscraper@1.0.0 build /home/travis/build/openzim/phet
> tsc
/home/travis/build/openzim/phet/node_modules/ts-node/src/index.ts:556
          throw new TypeError(`${relative(cwd, fileName)}: Emit skipped`)
                ^
TypeError: lib/logger.js: Emit skipped
    at getOutput (/home/travis/build/openzim/phet/node_modules/ts-node/src/index.ts:556:17)
    at Object.compile (/home/travis/build/openzim/phet/node_modules/ts-node/src/index.ts:758:32)
    at Module.m._compile (/home/travis/build/openzim/phet/node_modules/ts-node/src/index.ts:837:43)
    at Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Object.require.extensions.(anonymous function) [as .js] (/home/travis/build/openzim/phet/node_modules/ts-node/src/index.ts:840:12)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    at Module.require (internal/modules/cjs/loader.js:692:17)
    at require (internal/modules/cjs/helpers.js:25:18)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! phetscraper@1.0.0 export: `npm run export-prebuild && node --no-warnings --max-old-space-size=8192 node_modules/ts-node/dist/bin.js steps/export.ts "--mulOnly"`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the phetscraper@1.0.0 export script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR!     /home/travis/.npm/_logs/2020-04-03T00_33_54_205Z-debug.log
Done. Your build exited with 0.