added stage field in spec and solved issue of checking duplicates of multip…

backend/services/spec.go

@@ -124,7 +124,7 @@ func GetRunNameFromJob(job models.DiggerJob) (*string, error) {
 	return &runName, nil
 }
 
-func getVariablesSpecFromEnvMap(envVars map[string]string) []spec.VariableSpec {
+func getVariablesSpecFromEnvMap(envVars map[string]string, stage string) []spec.VariableSpec {
 	variablesSpec := make([]spec.VariableSpec, 0)
 	for k, v := range envVars {
 		if strings.HasPrefix(v, "$DIGGER_") {
@@ -134,19 +134,42 @@ func getVariablesSpecFromEnvMap(envVars map[string]string) []spec.VariableSpec {
 				Value:          val,
 				IsSecret:       false,
 				IsInterpolated: true,
+				Stage:          stage,
 			})
 		} else {
 			variablesSpec = append(variablesSpec, spec.VariableSpec{
 				Name:           k,
 				Value:          v,
 				IsSecret:       false,
 				IsInterpolated: false,
+				Stage:          stage,
 			})
 		}
 	}
 	return variablesSpec
 }
 
+func findDuplicatesInStage(variablesSpec []spec.VariableSpec, stage string) (error) {
+	// Extract the names from VariableSpec
+	justNames := lo.Map(variablesSpec, func(item spec.VariableSpec, i int) string {
+		return item.Name
+	})
+
+	// Group names by their occurrence
+	nameCounts := lo.CountValues(justNames)
+
+	// Filter names that occur more than once
+	duplicates := lo.Keys(lo.PickBy(nameCounts, func(name string, count int) bool {
+		return count > 1
+	}))
+
+	if len(duplicates) > 0 {
+		return fmt.Errorf("duplicate variable names found in '%s' stage: %v", stage, strings.Join(duplicates, ", "))
+	}
+
+	return nil // No duplicates found
+}
+
 func GetSpecFromJob(job models.DiggerJob) (*spec.Spec, error) {
 	var jobSpec scheduler.JobJson
 	err := json.Unmarshal([]byte(job.SerializedJobSpec), &jobSpec)
@@ -155,10 +178,21 @@ func GetSpecFromJob(job models.DiggerJob) (*spec.Spec, error) {
 		return nil, fmt.Errorf("could not marshal json string: %v", err)
 	}
 
+	stateVariables := getVariablesSpecFromEnvMap(jobSpec.StateEnvVars, "state")
+	commandVariables := getVariablesSpecFromEnvMap(jobSpec.CommandEnvVars, "commands")
+	runVariables := getVariablesSpecFromEnvMap(jobSpec.RunEnvVars, "run")
+
+	if err := findDuplicatesInStage(stateVariables, "state"); err != nil {
+		return nil, err
+	}
+	if err := findDuplicatesInStage(commandVariables, "commands"); err != nil {
+		return nil, err
+	}
+	if err := findDuplicatesInStage(runVariables, "run"); err != nil {
+		return nil, err
+	}
+
 	variablesSpec := make([]spec.VariableSpec, 0)
-	stateVariables := getVariablesSpecFromEnvMap(jobSpec.StateEnvVars)
-	commandVariables := getVariablesSpecFromEnvMap(jobSpec.CommandEnvVars)
-	runVariables := getVariablesSpecFromEnvMap(jobSpec.RunEnvVars)
 	variablesSpec = append(variablesSpec, stateVariables...)
 	variablesSpec = append(variablesSpec, commandVariables...)
 	variablesSpec = append(variablesSpec, runVariables...)

backend/services/spec_test.go

@@ -0,0 +1,44 @@
+// filepath: digger/backend/services/spec_test.go
+package services
+
+import (
+	// "fmt"
+	"github.com/diggerhq/digger/libs/spec"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestFindDuplicatesInStage_NoDuplicates(t *testing.T) {
+	variablesSpec := []spec.VariableSpec{
+		{Name: "VAR1"},
+		{Name: "VAR2"},
+		{Name: "VAR3"},
+	}
+	err := findDuplicatesInStage(variablesSpec, "test-stage")
+	assert.Nil(t, err, "Expected no error when there are no duplicates")
+}
+
+func TestFindDuplicatesInStage_WithDuplicates(t *testing.T) {
+	variablesSpec := []spec.VariableSpec{
+		{Name: "VAR1"},
+		{Name: "VAR2"},
+		{Name: "VAR1"},
+	}
+	err := findDuplicatesInStage(variablesSpec, "test-stage")
+	assert.NotNil(t, err, "Expected an error when duplicates are present")
+	assert.Contains(t, err.Error(), "duplicate variable names found in 'test-stage' stage: VAR1")
+}
+
+func TestFindDuplicatesInStage_EmptyVariablesSpec(t *testing.T) {
+	variablesSpec := []spec.VariableSpec{}
+	err := findDuplicatesInStage(variablesSpec, "test-stage")
+	assert.Nil(t, err, "Expected no error when variablesSpec is empty")
+}
+
+func TestFindDuplicatesInStage_SingleVariable(t *testing.T) {
+	variablesSpec := []spec.VariableSpec{
+		{Name: "VAR1"},
+	}
+	err := findDuplicatesInStage(variablesSpec, "test-stage")
+	assert.Nil(t, err, "Expected no error when there is only one variable")
+}

cli/pkg/spec/spec.go

@@ -131,9 +131,13 @@ func RunSpec(
 		reportError(spec, backendApi, msg, err)
 		usage.ReportErrorAndExit(spec.VCS.Actor, fmt.Sprintf("could not get variables from provider: %v", err), 1)
 	}
-	job.StateEnvVars = lo.Assign(job.StateEnvVars, variablesMap)
-	job.CommandEnvVars = lo.Assign(job.CommandEnvVars, variablesMap)
-	job.RunEnvVars = lo.Assign(job.RunEnvVars, variablesMap)
+
+	// Merge variables for each stage into the job's environment variables
+	for _, vars := range variablesMap {
+		job.StateEnvVars = lo.Assign(job.StateEnvVars, vars)
+		job.CommandEnvVars = lo.Assign(job.CommandEnvVars, vars)
+		job.RunEnvVars = lo.Assign(job.RunEnvVars, vars)
+	}
 
 	jobs := []scheduler.Job{job}
 

libs/spec/models.go

@@ -45,6 +45,7 @@ type VariableSpec struct {
 	Value          string `json:"value"`
 	IsSecret       bool   `json:"is_secret"`
 	IsInterpolated bool   `json:"is_interpolated"`
+	Stage          string `json:"stage"`
 }
 
 type SpecType string

libs/spec/variables_provider.go

@@ -9,31 +9,57 @@ import (
 
 type VariablesProvider struct{}
 
-func (p VariablesProvider) GetVariables(variables []VariableSpec) (map[string]string, error) {
+func (p VariablesProvider) GetVariables(variables []VariableSpec) (map[string]map[string]string, error) {
 	private_key := os.Getenv("DIGGER_PRIVATE_KEY")
-	secrets := lo.Filter(variables, func(variable VariableSpec, i int) bool {
-		return variable.IsSecret
+
+	// Group variables by their stage
+	stagedVariables := lo.GroupBy(variables, func(variable VariableSpec) string {
+		return variable.Stage
 	})
-	if len(secrets) > 0 && private_key == "" {
-		return nil, fmt.Errorf("digger private key not supplied, unable to decrypt secrets")
-	}
 
-	res := make(map[string]string)
+	result := make(map[string]map[string]string)
+
+	for stage, vars := range stagedVariables {
+		stageResult := make(map[string]string)
+
+		// Filter variables into three categories
+		secrets := lo.Filter(vars, func(variable VariableSpec, i int) bool {
+			return variable.IsSecret
+		})
+		interpolated := lo.Filter(vars, func(variable VariableSpec, i int) bool {
+			return variable.IsInterpolated
+		})
+		plain := lo.Filter(vars, func(variable VariableSpec, i int) bool {
+			return !variable.IsSecret && !variable.IsInterpolated
+		})
+
+		// Check if private key is required for secrets
+		if len(secrets) > 0 && private_key == "" {
+			return nil, fmt.Errorf("digger private key not supplied, unable to decrypt secrets")
+		}
 
-	for _, v := range variables {
-		if v.IsSecret {
+		// Process secret variables
+		for _, v := range secrets {
 			value, err := digger_crypto.DecryptValueUsingPrivateKey(v.Value, private_key)
 			if err != nil {
 				return nil, fmt.Errorf("could not decrypt value using private key: %v", err)
 			}
-			res[v.Name] = string(value)
-		} else if v.IsInterpolated {
-			// if it is an interpolated value we get it form env variable of the variable
-			res[v.Name] = os.Getenv(v.Value)
-		} else {
-			res[v.Name] = v.Value
+			stageResult[v.Name] = string(value)
 		}
+
+		// Process interpolated variables
+		for _, v := range interpolated {
+			stageResult[v.Name] = os.Getenv(v.Value)
+		}
+
+		// Process plain variables
+		for _, v := range plain {
+			stageResult[v.Name] = v.Value
+		}
+
+		// Add the processed variables for the current stage to the result
+		result[stage] = stageResult
 	}
 
-	return res, nil
+	return result, nil
 }

libs/spec/variables_provider_test.go

@@ -6,9 +6,10 @@ import (
 	"crypto/x509"
 	"encoding/base64"
 	"encoding/pem"
-	"github.com/stretchr/testify/assert"
 	"os"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 // generateTestKeyPair generates a test RSA key pair
@@ -76,6 +77,7 @@ func TestDecryptProvider(t *testing.T) {
 				}
 				tc.variables[0].Value = base64.StdEncoding.EncodeToString(v)
 			}
+
 			variables, err := VariablesProvider{}.GetVariables(tc.variables)
 			if tc.expectError {
 				if err == nil {
@@ -85,8 +87,15 @@ func TestDecryptProvider(t *testing.T) {
 				if err != nil {
 					t.Errorf("Unexpected error: %v", err)
 				}
-				value := variables[tc.variables[0].Name]
-				assert.Equal(t, tc.plaintext, value)
+
+				// Since the return type is map[string]map[string]string, we need to check the stage and variable name
+				stage := tc.variables[0].Stage
+				if _, ok := variables[stage]; !ok {
+					t.Errorf("Expected stage '%s' not found in variables map", stage)
+				} else {
+					value := variables[stage][tc.variables[0].Name]
+					assert.Equal(t, tc.plaintext, value)
+				}
 			}
 		})
 	}