Pass proxy env vars when using the ee-builder container (#223)

* Pass proxy env vars when using the ee-builder container
* Add unit tests
* Move env var logic to a better home

tools/wasme/changelog/v0.0.32/proxy-env-vars.yaml

@@ -0,0 +1,6 @@
+changelog:
+  - type: NEW_FEATURE
+    description: >-
+      When using the ee-builder container, wasme will now pass in the http_proxy,
+      https_proxy, no_proxy, and GOPROXY environment variables.
+    issueLink: https://github.com/solo-io/wasm/issues/119

tools/wasme/cli/pkg/cmd/build/assemblyscript.go

@@ -5,6 +5,7 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/solo-io/wasm/tools/wasme/cli/pkg/defaults"
 	"github.com/solo-io/wasm/tools/wasme/pkg/util"
 
 	"github.com/sirupsen/logrus"
@@ -55,6 +56,8 @@ func runNpmBuild(build buildOptions, npm npmOpts) (string, error) {
 		args = append(args, "-e", "NPM_USERNAME="+npm.username, "-e", "NPM_PASSWORD="+npm.password, "-e", "NPM_EMAIL="+npm.email)
 	}
 
+	args = append(args, defaults.GetProxyEnvArgs()...)
+
 	log.WithFields(logrus.Fields{
 		"args": args,
 	}).Debug("running npm-in-docker build...")

tools/wasme/cli/pkg/cmd/build/cpp.go

@@ -6,6 +6,7 @@ import (
 	"path/filepath"
 
 	"github.com/sirupsen/logrus"
+	"github.com/solo-io/wasm/tools/wasme/cli/pkg/defaults"
 	"github.com/solo-io/wasm/tools/wasme/pkg/util"
 	"github.com/spf13/cobra"
 )
@@ -54,6 +55,8 @@ func runBazelBuild(build buildOptions, bazel bazelOptions) (string, error) {
 		"-e", "BUILD_TOOL=bazel", // required by build-filter.sh in container
 	}
 
+	args = append(args, defaults.GetProxyEnvArgs()...)
+
 	log.WithFields(logrus.Fields{
 		"args": args,
 	}).Debug("running bazel-in-docker build...")

tools/wasme/cli/pkg/cmd/build/tinygo.go

@@ -6,6 +6,7 @@ import (
 	"path/filepath"
 
 	"github.com/sirupsen/logrus"
+	"github.com/solo-io/wasm/tools/wasme/cli/pkg/defaults"
 	"github.com/solo-io/wasm/tools/wasme/pkg/util"
 	"github.com/spf13/cobra"
 )
@@ -40,6 +41,8 @@ func runTinyGoBuild(build buildOptions) (string, error) {
 		"-e", "BUILD_TOOL=tinygo", // required by build-filter.sh in container
 	}
 
+	args = append(args, defaults.GetProxyEnvArgs()...)
+
 	log.WithFields(logrus.Fields{
 		"args": args,
 	}).Debug("running TinyGo-in-docker build...")

tools/wasme/cli/pkg/defaults/defaults_suite_test.go

@@ -0,0 +1,13 @@
+package defaults_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+func TestDefaults(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Defaults Suite")
+}

tools/wasme/cli/pkg/defaults/proxyenv.go

@@ -0,0 +1,27 @@
+package defaults
+
+import (
+	"fmt"
+	"os"
+)
+
+var passThroughVars = []string{
+	"http_proxy",
+	"https_proxy",
+	"no_proxy",
+	"GOPROXY",
+}
+
+// GetProxyEnvArgs reads several environment variables and returns
+// the arguments to pass them into the docker container used
+// during a wasme build command
+func GetProxyEnvArgs() []string {
+	var proxyEnvArgs []string
+	for _, envVar := range passThroughVars {
+		val, isSet := os.LookupEnv(envVar)
+		if isSet {
+			proxyEnvArgs = append(proxyEnvArgs, "-e", fmt.Sprintf("%s=%s", envVar, val))
+		}
+	}
+	return proxyEnvArgs
+}

tools/wasme/cli/pkg/defaults/proxyenv_test.go

@@ -0,0 +1,42 @@
+package defaults_test
+
+import (
+	"os"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	. "github.com/solo-io/wasm/tools/wasme/cli/pkg/defaults"
+)
+
+var _ = Describe("Env Proxy Args Passthrough", func() {
+	It("should not pass through any extra env vars if none are set", func() {
+		result := GetProxyEnvArgs()
+		Expect(result).To(HaveLen(0), "shouldn't generate extra args")
+	})
+
+	It("should pass a single env var when set", func() {
+		os.Setenv("http_proxy", "http://example.com")
+		result := GetProxyEnvArgs()
+		Expect(result).To(HaveLen(2))
+		Expect(result[0]).To(Equal("-e"))
+		Expect(result[1]).To(Equal("http_proxy=http://example.com"))
+	})
+
+	It("should pass multiple env vars when set", func() {
+		os.Setenv("http_proxy", "http://example.com")
+		os.Setenv("https_proxy", "https://example.com")
+		os.Setenv("no_proxy", "https://example.com/foo")
+		os.Setenv("GOPROXY", "https://example.com/bar")
+		result := GetProxyEnvArgs()
+		Expect(result).To(HaveLen(8))
+		Expect(result[0]).To(Equal("-e"))
+		Expect(result[1]).To(Equal("http_proxy=http://example.com"))
+		Expect(result[2]).To(Equal("-e"))
+		Expect(result[3]).To(Equal("https_proxy=https://example.com"))
+		Expect(result[4]).To(Equal("-e"))
+		Expect(result[5]).To(Equal("no_proxy=https://example.com/foo"))
+		Expect(result[6]).To(Equal("-e"))
+		Expect(result[7]).To(Equal("GOPROXY=https://example.com/bar"))
+	})
+})