Completes the addition of go module support, including vendored builds

[zgramana]

Enables support for building projects using Go 1.11+ modules (
karalabe#138). This support assumes that you have either (a) cloned the root repository of the package you wish to build, or (b) that you are outside of GOPATH in a folder containing a go.mod file. See go help modules for details.

NOTE: Unless/until these changes are merged into @karalabe's repo, you will need to run docker build to create your own 1.11.x docker image and pass the image name to xgo as show in the example below.

Example usage:

xgo --targets=darwin/amd64,linux/amd64 -image zgramana-xgo .

Given the file ./go.mod where the first line is module foo_bar, the above command will output two binaries named foo_bar-darwin-10.6-amd64 and foo_bar-linux-amd64.

vendor Support

If you first run go mod vendor in your repository root and then run xgo, it will automatically detect /vendor and pass -mod=vendor to go build (the door is left open for supporting -mod=readonly).

[kolaente]

Thanks a lot for this! I have a few improvements though.

[kolaente]

Thanks!

[zgramana]

\o/ Thanks for getting it started :)

[aboodman]

Sorry for maybe dumb question here, but I'm not very proficient with Docker. I cd'd into docker/go-1.11.x and ran docker build -t aa-xgo . and the resulting image did not include the changes to build.sh that enable modules support.

I realized that this was because the changes are on a branch, not master of this repo, so I switched to the branch and rebuilt, but the changes didn't get picked up.

I tried switching to docker/base and building that image, since that's where build.sh lives, but the build dies:

Step 22/50 : RUN   IOS_SDK_PATH=https://sdks.website/dl/iPhoneOS9.3.sdk.tbz2     &&   $FETCH $IOS_SDK_PATH db5ecf91617abf26d3db99e769bd655b943905e5 &&   mv `basename $IOS_SDK_PATH` iPhoneOS9.3.sdk.tar.bz2           &&   $UPDATE_IOS /iPhoneOS9.3.sdk.tar.bz2                          &&   rm -rf /iPhoneOS9.3.sdk.tar.bz2
 ---> Running in dbe0d09dcd6e
Downloading https://sdks.website/dl/iPhoneOS9.3.sdk.tbz2...
The command '/bin/sh -c IOS_SDK_PATH=https://sdks.website/dl/iPhoneOS9.3.sdk.tbz2     &&   $FETCH $IOS_SDK_PATH db5ecf91617abf26d3db99e769bd655b943905e5 &&   mv `basename $IOS_SDK_PATH` iPhoneOS9.3.sdk.tar.bz2           &&   $UPDATE_IOS /iPhoneOS9.3.sdk.tar.bz2                          &&   rm -rf /iPhoneOS9.3.sdk.tar.bz2' returned a non-zero code: 4

Am I on the right track here?

[kolaente]

It looks like https://sdks.website is not accessible and thus the build fails, hmmmm. I'm sorry, but I'm not that familiar with the internals of xgo either.

We actually forked xgo and added support for go modules (among other things) which works: https://github.com/techknowlogick/xgo. This one is also more up to date and activly maintained. We use it to build Gitea with go modules enabled. If you just want something "which works" I'd reccomend trying it.

[aboodman]

Thanks, I was hopeful there for a minute, but it doesn't seem to work for me because: techknowlogick/xgo#16