Add support for arm and arm64

[jonjohnsonjr]

Fixes #850

[jonjohnsonjr]

Seems to work?

$ goreleaser --snapshot --skip-publish --rm-dist
   • releasing...     
   • loading config file       file=.goreleaser.yml
   • loading environment variables
   • getting and validating git state
      • releasing v0.1.4, commit fd3fec5d0f09702accc262b49eabf3f0e3d2f116
      • pipe skipped              error=disabled during snapshot mode
   • parsing tag      
   • running before hooks
   • setting defaults 
      • snapshotting     
      • github/gitlab/gitea releases
      • project name     
      • building binaries
      • creating source archive
      • archives         
      • linux packages   
      • snapcraft packages
      • calculating checksums
      • signing artifacts
      • docker images    
      • artifactory      
      • blobs            
      • homebrew tap formula
      • scoop manifests  
      • milestones       
   • snapshotting     
   • checking ./dist  
   • writing effective config file
      • writing                   config=dist/config.yaml
   • generating changelog
      • pipe skipped              error=not available for snapshots
   • building binaries
      • building                  binary=/home/jonjohnson/go/src/github.com/google/go-containerregistry/dist/crane_windows_amd64/crane.exe
      • building                  binary=/home/jonjohnson/go/src/github.com/google/go-containerregistry/dist/crane_linux_386/crane
      • building                  binary=/home/jonjohnson/go/src/github.com/google/go-containerregistry/dist/crane_linux_amd64/crane
      • building                  binary=/home/jonjohnson/go/src/github.com/google/go-containerregistry/dist/crane_linux_arm_6/crane
      • building                  binary=/home/jonjohnson/go/src/github.com/google/go-containerregistry/dist/crane_linux_arm64/crane
      • building                  binary=/home/jonjohnson/go/src/github.com/google/go-containerregistry/dist/crane_darwin_amd64/crane
      • building                  binary=/home/jonjohnson/go/src/github.com/google/go-containerregistry/dist/gcrane_windows_amd64/gcrane.exe
      • building                  binary=/home/jonjohnson/go/src/github.com/google/go-containerregistry/dist/gcrane_linux_arm_6/gcrane
      • building                  binary=/home/jonjohnson/go/src/github.com/google/go-containerregistry/dist/gcrane_linux_amd64/gcrane
      • building                  binary=/home/jonjohnson/go/src/github.com/google/go-containerregistry/dist/gcrane_linux_386/gcrane
      • building                  binary=/home/jonjohnson/go/src/github.com/google/go-containerregistry/dist/gcrane_linux_arm64/gcrane
      • building                  binary=/home/jonjohnson/go/src/github.com/google/go-containerregistry/dist/gcrane_darwin_amd64/gcrane
   • archives         
      • creating                  archive=dist/go-containerregistry_Darwin_x86_64.tar.gz
      • creating                  archive=dist/go-containerregistry_Linux_x86_64.tar.gz
      • creating                  archive=dist/go-containerregistry_Linux_arm.tar.gz
      • creating                  archive=dist/go-containerregistry_Linux_i386.tar.gz
      • creating                  archive=dist/go-containerregistry_Linux_arm64.tar.gz
      • creating                  archive=dist/go-containerregistry_Windows_x86_64.tar.gz
   • creating source archive
      • pipe skipped              error=source pipe is disabled
   • linux packages   
   • snapcraft packages
   • calculating checksums
      • checksumming              file=go-containerregistry_Windows_x86_64.tar.gz
      • checksumming              file=go-containerregistry_Linux_x86_64.tar.gz
      • checksumming              file=go-containerregistry_Darwin_x86_64.tar.gz
      • checksumming              file=go-containerregistry_Linux_arm.tar.gz
      • checksumming              file=go-containerregistry_Linux_arm64.tar.gz
      • checksumming              file=go-containerregistry_Linux_i386.tar.gz
   • signing artifacts
   • docker images    
      • pipe skipped              error=docker section is not configured
   • publishing       
      • blobs            
         • pipe skipped              error=blobs section is not configured
      • http upload      
         • pipe skipped              error=uploads section is not configured
      • custom publisher 
         • pipe skipped              error=publishers section is not configured
      • artifactory      
         • pipe skipped              error=artifactory section is not configured
      • docker images    
         • pipe skipped              error=publishing is disabled
      • docker manifests 
         • pipe skipped              error=publishing is disabled
      • snapcraft packages
         • pipe skipped              error=publishing is disabled
      • github/gitlab/gitea releases
         • pipe skipped              error=publishing is disabled
      • homebrew tap formula
      • scoop manifests  
         • pipe skipped              error=publishing is disabled
      • milestones       
         • pipe skipped              error=publishing is disabled
   • release succeeded after 118.84s

[codecov-io]

Codecov Report

Merging #851 (fd3fec5) into master (59645bd) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #851   +/-   ##
=======================================
  Coverage   74.67%   74.67%           
=======================================
  Files         106      106           
  Lines        4435     4435           
=======================================
  Hits         3312     3312           
  Misses        633      633           
  Partials      490      490           

---

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[jonjohnsonjr]

Finally... let's see if anything breaks.

[jonjohnsonjr]

The google auth tests are broken on arm for some reason, so I've disabled them with +build !arm64 for now.

I pruned the matrix down to just use go1.15 and GO111MODULE=on for everything except for amd64 tests, which will hopefully be less wasteful.

@imjasonh added a test for MultiWrite that generated a truly monumental amount of logspam that slowed down the travis UI, so I fixed that as well.

=== RUN   TestMultiWrite_Deep
--- PASS: TestMultiWrite_Deep (38.07s)

That is still actually really slow... I'm surprised by it, but looking at the test it makes some sense:

idx[0] = 2 images
idx[1] = 2 images + idx[0] = 4 images
idx[2] = 2 images + idx[0] + idx[1] = 8 images
idx[3] = 2 images + idx[0] + idx[1] + idx[2] = 16 images
...
idx[10] = 2048 images ?

I'm still a bit surprised that we'd spend 38 seconds in that. In theory we'd calculate the digest just once for each layer. It looks like we don't memoize the digest for random.Image or random.Index... maybe we should? I'm guessing we spend most of that time just hashing stuff but I haven't actually measured.

[jonjohnsonjr]

So far everything but windows has passed so this looks pretty good.

[jonjohnsonjr]

🎉