Merge pull request #84 from BnMcG/noissue-repos-environment-interpolation

Allow environment variable interpolation in Helm repository configuration

docs/parameter_reference.md

@@ -95,7 +95,7 @@ values_files: [ "./over_9,000.yml" ]
 values_files: [ "./over_9", "000.yml" ]
 ```
 
-### Interpolating secrets into the `values` and `string_values` settings
+### Interpolating secrets into the `values`, `string_values` and `add_repos` settings
 
 If you want to send secrets to your charts, you can use syntax similar to shell variable interpolation--either `$VARNAME` or `$${VARNAME}`. The double dollar-sign is necessary when using curly brackets; using curly brackets with a single dollar-sign will trigger Drone's string substitution (which can't use arbitrary environment variables). If an environment variable is not set, it will be treated as if it were set to the empty string.
 

internal/env/config.go

@@ -2,11 +2,12 @@ package env
 
 import (
 	"fmt"
-	"github.com/kelseyhightower/envconfig"
 	"io"
 	"os"
 	"regexp"
 	"strings"
+
+	"github.com/kelseyhightower/envconfig"
 )
 
 var (
@@ -119,6 +120,10 @@ func (cfg *Config) loadValuesSecrets() {
 
 	cfg.Values = findVar.ReplaceAllStringFunc(cfg.Values, replacer)
 	cfg.StringValues = findVar.ReplaceAllStringFunc(cfg.StringValues, replacer)
+
+	for i := 0; i < len(cfg.AddRepos); i++ {
+		cfg.AddRepos[i] = findVar.ReplaceAllStringFunc(cfg.AddRepos[i], replacer)
+	}
 }
 
 func (cfg Config) logDebug() {

internal/env/config_test.go

@@ -2,10 +2,11 @@ package env
 
 import (
 	"fmt"
-	"github.com/stretchr/testify/suite"
 	"os"
 	"strings"
 	"testing"
+
+	"github.com/stretchr/testify/suite"
 )
 
 type ConfigTestSuite struct {
@@ -191,12 +192,14 @@ func (suite *ConfigTestSuite) TestNewConfigWithValuesSecrets() {
 	suite.setenv("SECRET_RINGS", "1")
 	suite.setenv("PLUGIN_VALUES", "fire=$SECRET_FIRE,water=${SECRET_WATER}")
 	suite.setenv("PLUGIN_STRING_VALUES", "rings=${SECRET_RINGS}")
+	suite.setenv("PLUGIN_ADD_REPOS", "testrepo=https://user:${SECRET_FIRE}@testrepo.test")
 
 	cfg, err := NewConfig(&strings.Builder{}, &strings.Builder{})
 	suite.Require().NoError(err)
 
 	suite.Equal("fire=Eru_Ilúvatar,water=", cfg.Values)
 	suite.Equal("rings=1", cfg.StringValues)
+	suite.Equal(fmt.Sprintf("testrepo=https://user:%s@testrepo.test", os.Getenv("SECRET_FIRE")), cfg.AddRepos[0])
 }
 
 func (suite *ConfigTestSuite) TestValuesSecretsWithDebugLogging() {