ci: use GitHub actions

Fix up tests etc whilst we are at it

.github/workflows/test.yml

@@ -0,0 +1,52 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - '**'
+
+env:
+  GOPROXY: https://proxy.golang.org
+
+# At the time of writing (2020-04-07) the default git config
+# on action runners includes core.autocrlf=true. Therefore we
+# override that below before checkout out the code.
+#
+# See also https://github.com/actions/checkout/issues/135
+
+name: Test
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        go-version: [1.13.9, 1.14.1]
+        platform: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.platform }}
+    steps:
+    - name: Install Go
+      uses: actions/setup-go@9fbc767707c286e568c92927bbf57d76b73e0892
+      with:
+        go-version: ${{ matrix.go-version }}
+    - name: Fix git config
+      run: git config --global core.autocrlf false
+    - run: mkdir -p gopath/src/github.com/myitcv/gobin
+    - name: Checkout code
+      uses: actions/checkout@01aecccf739ca6ff86c0539fbc67a7a5007bbc81
+      with:
+        path: gopath/src/github.com/myitcv/gobin
+    - name: Test
+      run: go test ./...
+      working-directory: gopath/src/github.com/myitcv/gobin
+    - name: Adjust GOPATH for non-module install
+      run: echo "::set-env name=GOPATH::$PWD/gopath"
+    - name: Adjust GO111MODULE for non-module install
+      run: echo "::set-env name=GO111MODULE::off"
+    - run: go env
+      working-directory: gopath/src/github.com/myitcv/gobin
+    - run: go list
+      working-directory: gopath/src/github.com/myitcv/gobin
+    - name: Non-module install test
+      run: go install
+      working-directory: gopath/src/github.com/myitcv/gobin

.github/workflows/verify_commit.yml

@@ -0,0 +1,32 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - '**'
+
+env:
+  GOPROXY: https://proxy.golang.org
+
+name: Verify commit is clean
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        go-version: [1.14.1]
+        platform: [ubuntu-latest]
+    runs-on: ${{ matrix.platform }}
+    steps:
+    - name: Install Go
+      uses: actions/setup-go@9fbc767707c286e568c92927bbf57d76b73e0892
+      with:
+        go-version: ${{ matrix.go-version }}
+    - name: Checkout code
+      uses: actions/checkout@01aecccf739ca6ff86c0539fbc67a7a5007bbc81
+    - run: go mod vendor
+    - run: go mod tidy
+    - name: Check git is clean
+      run: test -z "$(git status --porcelain)" || (git status; git diff; false)
+

go.mod

@@ -1,5 +1,5 @@
 module github.com/myitcv/gobin
 
-require github.com/rogpeppe/go-internal v1.3.1
+require github.com/rogpeppe/go-internal v1.5.2
 
 go 1.11

go.sum

@@ -3,8 +3,8 @@ github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORN
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
-github.com/rogpeppe/go-internal v1.3.1 h1:pgz0lCb+F99TrCwoy7d83j5kI//45fBQ34KzZ7t5as0=
-github.com/rogpeppe/go-internal v1.3.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
+github.com/rogpeppe/go-internal v1.5.2 h1:qLvObTrvO/XRCqmkKxUlOBc48bI3efyDuAZe25QiF0w=
+github.com/rogpeppe/go-internal v1.5.2/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/errgo.v2 v2.1.0 h1:0vLT13EuvQ0hNvakwLuFZ/jYrLp5F3kcWHXdRggjCE8=

main.go

@@ -771,7 +771,15 @@ func getGoEnv() (goEnv, error) {
 		}
 	}
 	{
+		// Create a temp dir that is not a module for the simple
+		// results we need from a go list of runtime
+		td, err := ioutil.TempDir("", "gobin-release-tags-")
+		if err != nil {
+			return goEnv{}, fmt.Errorf("failed to create temp dir for release tags derivation: %v", err)
+		}
+		defer os.RemoveAll(td)
 		cmd := exec.Command("go", "list", `-f={{join context.ReleaseTags "\n"}}`, "runtime")
+		cmd.Dir = td
 		out, err := cmd.CombinedOutput()
 		if err != nil {
 			return goEnv{}, fmt.Errorf("failed to get release tags: %v\n%s", err, out)

script_test.go

@@ -60,9 +60,14 @@ func TestExitCode(t *testing.T) {
 		"GONOSUMDB=*",
 		"GOPROXY="+proxyURL,
 		"TESTSCRIPT_COMMAND=gobin",
+
+		// We zero GOPATH here so that we definitely use the default
+		// location of $HOME (with the new $HOME)
+		"GOPATH=",
 	)
 
-	err = cmd.Run()
+	out, err := cmd.CombinedOutput()
+	fmt.Printf(">> %s\n", out)
 	if err == nil {
 		t.Fatalf("unexpected success")
 	}
@@ -72,7 +77,7 @@ func TestExitCode(t *testing.T) {
 	}
 	want := 42
 	if got := ExitCode(ee.ProcessState); want != got {
-		t.Fatalf("expected exit code %v; got %v", want, got)
+		t.Fatalf("expected exit code %v; got %v; output was: %s", want, got, out)
 	}
 }
 

testdata/mod_readonly.txt

@@ -8,7 +8,8 @@ cd repo
 ! stdout .+
 [go1.11] [!go1.12] stderr 'import lookup disabled by -mod=readonly'
 [go1.12] [!go1.13] stderr 'can''t load package: package github.com/gobin-testrepos/simple-main: unknown import path "github.com/gobin-testrepos/simple-main": import lookup disabled by -mod=readonly'
-[go1.13] stderr 'can''t load package: package github\.com/gobin-testrepos/simple-main: import lookup disabled by -mod=readonly'
+[go1.13] [!go1.14] stderr 'updates to go.mod needed, disabled by -mod=readonly'
+[go1.14] stderr 'cannot find module providing package github\.com/gobin-testrepos/simple-main: import lookup disabled by -mod=readonly'
 
 -- repo/go.mod --
 module example.com/repo