Modify magician to support optional envvars (#12599)

.ci/magician/cmd/check_cassettes.go

@@ -11,7 +11,7 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var ccEnvironmentVariables = [...]string{
+var ccRequiredEnvironmentVariables = [...]string{
 	"COMMIT_SHA",
 	"GOCACHE",
 	"GOPATH",
@@ -32,25 +32,35 @@ var ccEnvironmentVariables = [...]string{
 	"SA_KEY",
 }
 
+var ccOptionalEnvironmentVariables = [...]string{}
+
 var checkCassettesCmd = &cobra.Command{
 	Use:   "check-cassettes",
 	Short: "Run VCR tests on downstream main branch",
 	Long: `This command runs after downstream changes are merged and runs the most recent
 	VCR cassettes using the newly built beta provider.
 
-	The following environment variables are expected:
-` + listCCEnvironmentVariables() + `
+	The following environment variables are required:
+` + listCCRequiredEnvironmentVariables() + `
 
 	It prints a list of tests that failed in replaying mode along with all test output.`,
 	RunE: func(cmd *cobra.Command, args []string) error {
-		env := make(map[string]string, len(ccEnvironmentVariables))
-		for _, ev := range ccEnvironmentVariables {
+		env := make(map[string]string)
+		for _, ev := range ccRequiredEnvironmentVariables {
 			val, ok := os.LookupEnv(ev)
 			if !ok {
 				return fmt.Errorf("did not provide %s environment variable", ev)
 			}
 			env[ev] = val
 		}
+		for _, ev := range ccOptionalEnvironmentVariables {
+			val, ok := os.LookupEnv(ev)
+			if ok {
+				env[ev] = val
+			} else {
+				fmt.Printf("🟡 Did not provide %s environment variable\n", ev)
+			}
+		}
 
 		githubToken, ok := lookupGithubTokenOrFallback("GITHUB_TOKEN_DOWNSTREAMS")
 		if !ok {
@@ -80,9 +90,9 @@ func lookupGithubTokenOrFallback(tokenName string) (string, bool) {
 	return val, ok
 }
 
-func listCCEnvironmentVariables() string {
+func listCCRequiredEnvironmentVariables() string {
 	var result string
-	for i, ev := range ccEnvironmentVariables {
+	for i, ev := range ccRequiredEnvironmentVariables {
 		result += fmt.Sprintf("\t%2d. %s\n", i+1, ev)
 	}
 	return result

.ci/magician/cmd/test_terraform_vcr.go

@@ -33,7 +33,7 @@ var (
 	recordReplayTmplText string
 )
 
-var ttvEnvironmentVariables = [...]string{
+var ttvRequiredEnvironmentVariables = [...]string{
 	"GOCACHE",
 	"GOPATH",
 	"GOOGLE_BILLING_ACCOUNT",
@@ -55,6 +55,8 @@ var ttvEnvironmentVariables = [...]string{
 	"USER",
 }
 
+var ttvOptionalEnvironmentVariables = [...]string{}
+
 type analytics struct {
 	ReplayingResult  vcr.Result
 	RunFullVCR       bool
@@ -103,16 +105,24 @@ It expects the following arguments:
 	5. Build step number
 	
 The following environment variables are required:
-` + listTTVEnvironmentVariables(),
+` + listTTVRequiredEnvironmentVariables(),
 	RunE: func(cmd *cobra.Command, args []string) error {
-		env := make(map[string]string, len(ttvEnvironmentVariables))
-		for _, ev := range ttvEnvironmentVariables {
+		env := make(map[string]string)
+		for _, ev := range ttvRequiredEnvironmentVariables {
 			val, ok := os.LookupEnv(ev)
 			if !ok {
 				return fmt.Errorf("did not provide %s environment variable", ev)
 			}
 			env[ev] = val
 		}
+		for _, ev := range ttvOptionalEnvironmentVariables {
+			val, ok := os.LookupEnv(ev)
+			if ok {
+				env[ev] = val
+			} else {
+				fmt.Printf("🟡 Did not provide %s environment variable\n", ev)
+			}
+		}
 
 		for _, tokenName := range []string{"GITHUB_TOKEN_DOWNSTREAMS", "GITHUB_TOKEN_MAGIC_MODULES"} {
 			val, ok := lookupGithubTokenOrFallback(tokenName)
@@ -147,9 +157,9 @@ The following environment variables are required:
 	},
 }
 
-func listTTVEnvironmentVariables() string {
+func listTTVRequiredEnvironmentVariables() string {
 	var result string
-	for i, ev := range ttvEnvironmentVariables {
+	for i, ev := range ttvRequiredEnvironmentVariables {
 		result += fmt.Sprintf("\t%2d. %s\n", i+1, ev)
 	}
 	return result

.ci/magician/cmd/vcr_cassette_update.go

@@ -15,7 +15,7 @@ import (
 	_ "embed"
 )
 
-var vcuEnvironmentVariables = [...]string{
+var vcuRequiredEnvironmentVariables = [...]string{
 	"GOCACHE",
 	"GOPATH",
 	"GOOGLE_BILLING_ACCOUNT",
@@ -38,6 +38,8 @@ var vcuEnvironmentVariables = [...]string{
 	"GITHUB_TOKEN_CLASSIC",
 }
 
+var vcuOptionalEnvironmentVariables = [...]string{}
+
 var (
 	//go:embed templates/vcr/vcr_cassettes_update_replaying.tmpl
 	replayingTmplText string
@@ -73,14 +75,22 @@ var vcrCassetteUpdateCmd = &cobra.Command{
 	Args: cobra.ExactArgs(1),
 	RunE: func(cmd *cobra.Command, args []string) error {
 
-		env := make(map[string]string, len(vcuEnvironmentVariables))
-		for _, ev := range vcuEnvironmentVariables {
+		env := make(map[string]string)
+		for _, ev := range vcuRequiredEnvironmentVariables {
 			val, ok := os.LookupEnv(ev)
 			if !ok {
 				return fmt.Errorf("did not provide %s environment variable", ev)
 			}
 			env[ev] = val
 		}
+		for _, ev := range vcuOptionalEnvironmentVariables {
+			val, ok := os.LookupEnv(ev)
+			if ok {
+				env[ev] = val
+			} else {
+				fmt.Printf("🟡 Did not provide %s environment variable\n", ev)
+			}
+		}
 
 		buildID := args[0]