swiftenv install 3.0 fails with "version `3.0' is not installed" on TravisCi's xcode7.2 image

[dgholz]

I've set up a Travis CI build to install swift 3.0 on their xcode7.2 image. When I configure it to install 3.0, I see:

$ swiftenv install --verbose 3.0
Checking for a URL for the 3.0 on osx.
Installing 3.0 from https://swift.org/builds/swift-3.0-release/xcode/swift-3.0-RELEASE/swift-3.0-RELEASE-osx.pkg on osx.
Downloading https://swift.org/builds/swift-3.0-release/xcode/swift-3.0-RELEASE/swift-3.0-RELEASE-osx.pkg
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  254M  100  254M    0     0  11.1M      0  0:00:22  0:00:22 --:--:-- 12.5M
installer: Package name is Swift Open Source Xcode Toolchain
installer: Installing at base path /
installer: The install was successful.
3.0 has been installed.
swiftenv: version `3.0' is not installed

I think this is because https://github.com/kylef/swiftenv/blob/master/share/swiftenv-install/3.0#L11 will use https://swift.org/builds/swift-3.0-release/xcode/swift-3.0-RELEASE/swift-3.0-RELEASE-osx.pkg to install version 3.0. That package installs to /Library/Developer/Toolchains/swift-3.0-RELEASE.xctoolchain, but https://github.com/kylef/swiftenv/blob/master/libexec/swiftenv-prefix#L29 instead checks for /Library/Developer/Toolchains/swift-3.0.xctoolchain (without the -RELEASE).

I can't replicated it locally, as I've installed Xcode 8 & swiftenv-prefix finds /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift, and its version is

Apple Swift version 3.0 (swiftlang-800.0.46.2 clang-800.0.38)
Target: x86_64-apple-macosx10.9

which is recognised by https://github.com/kylef/swiftenv/blob/master/libexec/swiftenv-prefix#L47

[dgholz]

Here's my Travis CI osx job with xtrace enabled, if you want to see what swiftenv did.

[sauliusgrigaitis]

I get same error on my Ubuntu 16.04:

$ swiftenv install 3.0
3.0 has been installed.
swiftenv: version `3.0' is not installed

[kylef]

@dgholz I've made some changes to check for -RELEASE versions in master to solve this problem. Please give it a try again.

I would note that Xcode 8 is a dependency of Swift 3.0. I don't think you will be able to run Swift 3.0 on macOS without Xcode 8. You can see this mentioned on Swift.org https://swift.org/download/#releases

---

@sauliusgrigaitis your issue doesn't seem to be the same one as this thread. Can you please file another issue including the version of swiftenv you are using and we can debug this problem you are facing.

[kylef]

@sauliusgrigaitis I think 041ac8a will solve your problem, can you try updating swiftenv from git and test.

[dgholz]

@kylef thanks, I now see 3.0 installing & my build proceeds, and that my test fail to run due to Swift 3.0 requiring Xcode8… exactly as you thought.

I switched the osx_image to xcode8, and I see that swiftenv install 3.0 short-circuits, but returns non-zero:

2.15s$ swiftenv install --verbose 3.0

3.0 is already installed.

The command "swiftenv install --verbose 3.0" failed and exited with 1 during .

My expectation is that it should return zero, since 3.0 was installed. Shall I make a separate issue?

[kylef]

@dgholz Since you've explicitly tried to install swift it would provide an error if it's already installed. I've added an argument (-s or --skip-existing) which can be used to exit 0 instead (useful for things like CI).

$ swiftenv install --skip-existing 3.0
$ swiftenv install -s 3.0

If you're using the Travis CI integration, the latest version of it will use -s so it won't fail when the Swift version is already installed.

https://gist.githubusercontent.com/kylef/5c0475ff02b7c7671d2a/raw/9f442512a46d7a2af7b850d65a7e9bd31edfb09b/swiftenv-install.sh

Does that work for you?

[wongzigii]

@kylef I just try your script in my fork. https://github.com/wongzigii/Quick/pull/5 But seems the CI is still in error.

[kylef]

@wongzigii Please see the Travis CI integration guide: https://swiftenv.fuller.li/en/latest/integrations/travis-ci.html. The way you have configured swiftenv is with a different/unsupported way by piping it into bash. You will also need to switch to the Travis CI trusty image as mentioned in the guide.

[dgholz]

@kylef works like a charm, thanks for all your help!