Does not build on Windows

[davidpodhola]

When I cloned the repo, it does not build on my machine where otherwise I use fable.

I am pretty sure it is because I miss something and generally I am too pedantic on the DevOps (does that still exist?).

Building: C:\Users\david.podhola\Documents\S\fable-elmish\src\elmish
C:\Users\david.podhola\Documents\S\fable-elmish\packages\Npm.js\tools\npm.cmd run build
Running build failed.
Error:
System.Exception: Start of process C:\Users\david.podhola\Documents\S\fable-elmish\packages\Npm.js\tools\npm.cmd failed. The system cannot find the file specified

[et1975]

That's true, the build infrastructure is weak ATM and it doesn't build on Windows.
Partially because I use OSX and partially because I don't believe paket should be installing npm as my local dependency. Also, I've switched a while ago to yarn, so even if it worked, it wouldn't be doing a proper job, i.e. a reproducible build.

Having said that, running yarn build in each of src subfolders (starting with elmish) should build on Windows (it did, last time I tried).

Thanks for bringing it to my attention again, I need to have a better build script and Travis/AppVeyor to go with it.

[MangelMaxime]

We was having the same problem for fable-arch.
If you upgrade Fake to a certain version, them it will look for npm.bat in your PATH variable.

Here is the commit fixing the problem for Fable-arch: fable-compiler/fable-arch@9aaf39d

[davidpodhola]

Thanks @et1975 and @MangelMaxime . Yes, I also do not believe npm should be installed locally. I have npm installed, but for some reason it is not detected by FAKE (?)

Anyway in samples it seems cp is used so it would not run anyway even with yarn I assume.

[et1975]

cp is used

Ah, yes... unless cp is an alias in PowerShell? Can't wait for linux subsystem to become mainstream on Windows :)

Anyway, even as it is, it's easy to fix - since all the web samples use webpack2 it would be fairly straightforward to either pack the styles from the node_modules or add a plugin to do the copying.

[davidpodhola]

OK, thanks for the info will have a look at that next week.

[et1975]

If you check my fork, you'll see I've switched the build to yarn, it builds on AppVeyor and TravisCI now. Got into a weird Fable build problem trying to consolidate dev dependencies, but fake script is fine now.
The samples take a long time to build, so I'll keep them as an optional target. Still would like to see them building on Windows, so I'd appreciate the effort there!

[et1975]

The elmish projects should build now (see the updated readme).

[davidpodhola]

build.cmd without parameters works now, great, thank you @et1975!
samples do not build; it is not only matter of cp, there are other path-related issues I think.

Will need to look at this more

[et1975]

that was an error in fable-elmish-react@0.8.1, please upgrade to 0.8.2.
... I should unlist it.

[davidpodhola]

Confirm, after upgrade it works. Now I try to test the react native samples on Windows too, but I think this is a different story so closing here, thanks again!