fix: binary installation, checksums, cleanup

Dockerfile

@@ -13,9 +13,16 @@ FROM alpine:latest@sha256:0a4eaa0eecf5f8c050e5bba433f58c052be7587ee8af3e8b3910ef
 
 ARG TERRAFORM_VERSION
 
-RUN wget -q https://releases.hashicorp.com/terraform/${TERRAFORM_VERSION}/terraform_${TERRAFORM_VERSION}_linux_amd64.zip -O terraform.zip && \
-  unzip terraform.zip -d /bin && \
-  rm -f terraform.zip
+ENV TERRAFORM_RELEASE_URL="https://releases.hashicorp.com/terraform/${TERRAFORM_VERSION}"
+ENV TERRAFORM_ZIP_FILENAME="terraform_${TERRAFORM_VERSION}_linux_amd64.zip"
+ENV TERRAFORM_CHECKSUMS_FILENAME="terraform_${TERRAFORM_VERSION}_SHA256SUMS"
+
+# download and verify the Terraform binary
+RUN wget -q "${TERRAFORM_RELEASE_URL}/${TERRAFORM_ZIP_FILENAME}" -O "${TERRAFORM_ZIP_FILENAME}" && \
+    wget -q "${TERRAFORM_RELEASE_URL}/${TERRAFORM_CHECKSUMS_FILENAME}" -O "${TERRAFORM_CHECKSUMS_FILENAME}" && \
+    cat "${TERRAFORM_CHECKSUMS_FILENAME}" | grep "${TERRAFORM_ZIP_FILENAME}" | sha256sum -c && \
+    unzip "${TERRAFORM_ZIP_FILENAME}" -d /bin && \
+    rm -f "${TERRAFORM_ZIP_FILENAME}" "${TERRAFORM_CHECKSUMS_FILENAME}"
 
 ##############################################################################
 ##     docker build --no-cache --target certs -t vela-terraform:certs .     ##

cmd/vela-terraform/main.go

@@ -293,7 +293,7 @@ func run(c *cli.Context) error {
 	tfVersion := c.String("terraform.version")
 
 	// attempt to install the custom terraform tfVersion if different from default
-	err := install(tfVersion, os.Getenv("PLUGIN_TERRAFORM_VERSION"))
+	err := installBinary(tfVersion, os.Getenv("PLUGIN_TERRAFORM_VERSION"))
 	if err != nil {
 		return err
 	}

cmd/vela-terraform/plan_test.go

@@ -105,7 +105,7 @@ func TestTerraform_Plan_Command_tf13(t *testing.T) {
 		fmt.Sprintf("-var=%s", p.Vars[1]),
 		fmt.Sprintf("-var-file=%s", p.VarFiles[0]),
 		fmt.Sprintf("-var-file=%s", p.VarFiles[1]),
-		fmt.Sprintf(p.Directory),
+		fmt.Sprint(p.Directory),
 	)
 
 	got := p.Command()

cmd/vela-terraform/terraform.go

@@ -3,6 +3,7 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"os"
 	"regexp"
@@ -11,15 +12,19 @@ import (
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/afero"
 
-	getter "github.com/hashicorp/go-getter"
+	"github.com/hashicorp/go-version"
+	install "github.com/hashicorp/hc-install"
+	"github.com/hashicorp/hc-install/product"
+	"github.com/hashicorp/hc-install/releases"
+	"github.com/hashicorp/hc-install/src"
 )
 
 const (
-	_terraform = "/bin/terraform"
-	_download  = "https://releases.hashicorp.com/terraform/%s/terraform_%s_linux_amd64.zip"
+	_installDir = "/bin"
+	_terraform  = _installDir + "/" + "terraform"
 )
 
-func install(customVer, defaultVer string) error {
+func installBinary(customVer, defaultVer string) error {
 	// use custom filesystem which enables us to test
 	a := &afero.Afero{
 		Fs: appFS,
@@ -31,30 +36,32 @@ func install(customVer, defaultVer string) error {
 		return nil
 	}
 
-	logrus.Infof("custom terraform version requested: %s", customVer)
-
-	logrus.Debugf("custom version does not match default: %s", defaultVer)
-	// rename the old terraform binary since we can't overwrite it for now
-	//
-	// https://github.com/hashicorp/go-getter/issues/219
-	err := a.Rename(_terraform, fmt.Sprintf("%s.default", _terraform))
+	// parse the custom version
+	v, err := version.NewVersion(customVer)
 	if err != nil {
 		return err
 	}
 
-	// create the download URL to install terraform
-	url := fmt.Sprintf(_download, customVer, customVer)
+	logrus.Infof("custom terraform version requested: %s", customVer)
 
-	logrus.Infof("downloading terraform version from: %s", url)
-	// send the HTTP request to install terraform
-	err = getter.GetFile(_terraform, url, []getter.ClientOption{}...)
+	logrus.Debugf("custom version does not match default: %s", defaultVer)
+
+	// rename the old terraform binary since we can't overwrite it for now
+	err = a.Rename(_terraform, fmt.Sprintf("%s.default", _terraform))
 	if err != nil {
 		return err
 	}
 
-	logrus.Debugf("changing ownership of file: %s", _terraform)
-	// ensure the terraform binary is executable
-	err = a.Chmod(_terraform, 0700)
+	// use hc-install to install the custom version
+	installer := install.NewInstaller()
+	_, err = installer.Install(context.Background(), []src.Installable{
+		&releases.ExactVersion{
+			Product:    product.Terraform,
+			Version:    v,
+			InstallDir: _installDir,
+		},
+	})
+
 	if err != nil {
 		return err
 	}

cmd/vela-terraform/terraform_test.go

@@ -14,7 +14,7 @@ func TestTerraform_install(t *testing.T) {
 	appFS = afero.NewMemMapFs()
 
 	// run test
-	err := install("0.11.0", "0.11.0")
+	err := installBinary("0.11.0", "0.11.0")
 	if err != nil {
 		t.Errorf("install returned err: %v", err)
 	}
@@ -25,7 +25,7 @@ func TestTerraform_install_NoBinary(t *testing.T) {
 	appFS = afero.NewMemMapFs()
 
 	// run test
-	err := install("0.11.0", "0.12.0")
+	err := installBinary("0.11.0", "0.12.0")
 	if err == nil {
 		t.Errorf("install should have returned err")
 	}
@@ -46,7 +46,7 @@ func TestTerraform_install_NotWritable(t *testing.T) {
 	}
 
 	// run test
-	err = install("0.11.0", "0.12.0")
+	err = installBinary("0.11.0", "0.12.0")
 	if err == nil {
 		t.Errorf("install should have returned err")
 	}

cmd/vela-terraform/validate_test.go

@@ -64,7 +64,7 @@ func TestTerraform_Validation_Command_tf13(t *testing.T) {
 		fmt.Sprintf("-var=%s", v.Vars[1]),
 		fmt.Sprintf("-var-file=%s", v.VarFiles[0]),
 		fmt.Sprintf("-var-file=%s", v.VarFiles[1]),
-		fmt.Sprintf(v.Directory),
+		fmt.Sprint(v.Directory),
 	)
 
 	got := v.Command()

go.mod

@@ -5,58 +5,28 @@ go 1.23
 require (
 	github.com/Masterminds/semver/v3 v3.2.1
 	github.com/go-vela/types v0.24.0
-	github.com/hashicorp/go-getter v1.7.6
+	github.com/hashicorp/go-version v1.7.0
+	github.com/hashicorp/hc-install v0.8.0
 	github.com/joho/godotenv v1.5.1
 	github.com/sirupsen/logrus v1.9.3
 	github.com/spf13/afero v1.11.0
 	github.com/urfave/cli/v2 v2.27.4
 )
 
 require (
-	cloud.google.com/go v0.115.1 // indirect
-	cloud.google.com/go/auth v0.8.1 // indirect
-	cloud.google.com/go/auth/oauth2adapt v0.2.4 // indirect
-	cloud.google.com/go/compute/metadata v0.5.0 // indirect
-	cloud.google.com/go/iam v1.1.13 // indirect
-	cloud.google.com/go/storage v1.43.0 // indirect
-	github.com/aws/aws-sdk-go v1.55.5 // indirect
-	github.com/bgentry/go-netrc v0.0.0-20140422174119-9fd32a8b3d3d // indirect
+	github.com/ProtonMail/go-crypto v1.1.0-alpha.2 // indirect
+	github.com/cloudflare/circl v1.3.7 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.4 // indirect
-	github.com/felixge/httpsnoop v1.0.4 // indirect
-	github.com/go-logr/logr v1.4.2 // indirect
-	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
-	github.com/google/s2a-go v0.1.8 // indirect
-	github.com/google/uuid v1.6.0 // indirect
-	github.com/googleapis/enterprise-certificate-proxy v0.3.2 // indirect
-	github.com/googleapis/gax-go/v2 v2.13.0 // indirect
+	github.com/hashicorp/errwrap v1.0.0 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
-	github.com/hashicorp/go-safetemp v1.0.0 // indirect
-	github.com/hashicorp/go-version v1.7.0 // indirect
-	github.com/jmespath/go-jmespath v0.4.0 // indirect
-	github.com/klauspost/compress v1.17.9 // indirect
-	github.com/mitchellh/go-homedir v1.1.0 // indirect
-	github.com/mitchellh/go-testing-interface v1.14.1 // indirect
+	github.com/hashicorp/go-multierror v1.1.1 // indirect
+	github.com/hashicorp/go-retryablehttp v0.7.7 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
-	github.com/ulikunitz/xz v0.5.12 // indirect
+	github.com/stretchr/testify v1.9.0 // indirect
 	github.com/xrash/smetrics v0.0.0-20240521201337-686a1a2994c1 // indirect
-	go.opencensus.io v0.24.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.53.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.53.0 // indirect
-	go.opentelemetry.io/otel v1.28.0 // indirect
-	go.opentelemetry.io/otel/metric v1.28.0 // indirect
-	go.opentelemetry.io/otel/trace v1.28.0 // indirect
 	golang.org/x/crypto v0.26.0 // indirect
+	golang.org/x/mod v0.19.0 // indirect
 	golang.org/x/net v0.28.0 // indirect
-	golang.org/x/oauth2 v0.22.0 // indirect
-	golang.org/x/sync v0.8.0 // indirect
 	golang.org/x/sys v0.24.0 // indirect
 	golang.org/x/text v0.17.0 // indirect
-	golang.org/x/time v0.6.0 // indirect
-	google.golang.org/api v0.192.0 // indirect
-	google.golang.org/genproto v0.0.0-20240812133136-8ffd90a71988 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20240812133136-8ffd90a71988 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240812133136-8ffd90a71988 // indirect
-	google.golang.org/grpc v1.65.0 // indirect
-	google.golang.org/protobuf v1.34.2 // indirect
 )