feat: allow loading a dotenv file (#7)

README.md

@@ -16,6 +16,18 @@ environment:
     MY_OTHER_ENV: "Another value I need"
 ```
 
+### Dotenv File
+`.env` files can be loaded in by specifying the `load_env` tag. Any vars specified in the `environment` section will override values set in the dotenv file specified.
+
+```yaml
+# .biome.yaml
+name: my-biome
+load_env: my_env_file.env # Specify the name of the file to load in
+environment:
+    MY_USEFUL_ENV: "A value I need"
+    MY_OTHER_ENV: "Another value I need"
+```
+
 ### AWS Environment
 By specifying the `aws_profile` configuration value, Biome will load that [AWS Profile](https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-files.html) from `~/.aws/credentials` and configure the environment variables and a session for this command.
 

example.biome.yaml

@@ -1,5 +1,6 @@
 name: my-staging-biome # Required for identifying this biome
 aws_profile: my_staging_aws_profile # Will set the AWS environment vars
+load_env: example_file.env # Load additional envs from a dotenv file
 environment: # Additional environment vars to load in
   ENVIRONMENT: staging
   MY_USEFUL_ENV: "A value I need"

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/aws/aws-sdk-go-v2/credentials v1.12.4
 	github.com/aws/aws-sdk-go-v2/service/secretsmanager v1.15.9
 	github.com/aws/aws-sdk-go-v2/service/sts v1.16.6
+	github.com/joho/godotenv v1.4.0
 	github.com/meltwater/dragoman v1.2.2
 	github.com/stretchr/testify v1.7.1
 	gopkg.in/yaml.v3 v3.0.1

go.sum

@@ -37,6 +37,8 @@ github.com/google/go-cmp v0.5.7 h1:81/ik6ipDQS2aGcBfIN5dHDB36BwrStyeAQquSYCV4o=
 github.com/google/go-cmp v0.5.7/go.mod h1:n+brtR0CgQNWTVd5ZUFpTBC8YFBDLK/h/bpaJ8/DtOE=
 github.com/jmespath/go-jmespath v0.4.0/go.mod h1:T8mJZnbsbmF+m6zOOFylbeCJqk5+pHWvzYPziyZiYoo=
 github.com/jmespath/go-jmespath/internal/testify v1.5.1/go.mod h1:L3OGu8Wl2/fWfCI6z80xFu9LTZmf1ZRjMHUOPmWr69U=
+github.com/joho/godotenv v1.4.0 h1:3l4+N6zfMWnkbPEXKng2o2/MR5mSwTrBih4ZEkkz1lg=
+github.com/joho/godotenv v1.4.0/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/kr/pretty v0.2.0 h1:s5hAObm+yFO5uHYt5dYjxi2rXrsnmRpJx4OYvIWUaQs=
 github.com/kr/pretty v0.2.0/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=

src/lib/types/biome.go

@@ -6,8 +6,9 @@ type Biome struct {
 }
 
 type BiomeConfig struct {
-	Name        string
-	AwsProfile  string                 `yaml:"aws_profile"`
-	Commands    []string               `yaml:"commands"`
-	Environment map[string]interface{} `yaml:"environment"`
+	Name            string
+	AwsProfile      string                 `yaml:"aws_profile"`
+	Commands        []string               `yaml:"commands"`
+	ExternalEnvFile string                 `yaml:"load_env"`
+	Environment     map[string]interface{} `yaml:"environment"`
 }

src/services/biome_configuration_service.go

@@ -10,6 +10,7 @@ import (
 	"github.com/jeff-roche/biome/src/lib/setters"
 	"github.com/jeff-roche/biome/src/lib/types"
 	"github.com/jeff-roche/biome/src/repos"
+	"github.com/joho/godotenv"
 )
 
 var defaultFileNames = []string{".biome.yaml", ".biome.yml"}
@@ -72,12 +73,37 @@ func (svc *BiomeConfigurationService) LoadBiomeFromFile(biomeName string, fpath
 	return nil
 }
 
+// Activate biome will load up the configuration and run any setup commands before running the specified program
 func (svc *BiomeConfigurationService) ActivateBiome() error {
 	if svc.ActiveBiome == nil {
 		return fmt.Errorf("no biome loaded")
 	}
 
-	// AWS Profile Configuration
+	// AWS
+	if err := svc.loadAws(); err != nil {
+		return err
+	}
+
+	// Dot Env
+	if err := svc.loadFromEnv(svc.ActiveBiome.Config.ExternalEnvFile); err != nil {
+		return err
+	}
+
+	// Parse all Envs
+	if err := svc.loadEnvs(); err != nil {
+		return err
+	}
+
+	// Additional Commands
+	if err := svc.runSetupCommands(); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// loadAws will load in the AWS profile if one was specified
+func (svc *BiomeConfigurationService) loadAws() error {
 	if svc.ActiveBiome.Config.AwsProfile != "" {
 		envCfg, err := svc.awsStsRepo.ConfigureSession(svc.ActiveBiome.Config.AwsProfile)
 		if err != nil {
@@ -87,6 +113,32 @@ func (svc *BiomeConfigurationService) ActivateBiome() error {
 		svc.awsStsRepo.SetAwsEnvs(envCfg)
 	}
 
+	return nil
+}
+
+// loadFromEnv will load in addition environment variables from the ENV file
+//     Any envs specified in the biome config will override vars specified in the dotenv
+func (svc *BiomeConfigurationService) loadFromEnv(fname string) error {
+	if fname != "" {
+		loadedEnvs, err := godotenv.Read(fname)
+		if err != nil {
+			return err
+		}
+
+		for key, val := range loadedEnvs {
+
+			// Only save the key if one wasn't specified in the biome config
+			if _, exists := svc.ActiveBiome.Config.Environment[key]; !exists {
+				svc.ActiveBiome.Config.Environment[key] = val
+			}
+		}
+	}
+
+	return nil
+}
+
+// loadEnvs will parse all the envs in the Environment map and load them into memory
+func (svc *BiomeConfigurationService) loadEnvs() error {
 	// Loop over the envs and set them
 	for env, val := range svc.ActiveBiome.Config.Environment {
 		setter, err := setters.GetEnvironmentSetter(env, val)
@@ -100,12 +152,18 @@ func (svc *BiomeConfigurationService) ActivateBiome() error {
 		}
 	}
 
-	// Any other environment setup commands
+	return nil
+}
+
+// runSetupCommands will run any command line commands specified in the biome configuration
+func (svc *BiomeConfigurationService) runSetupCommands() error {
 	if len(svc.ActiveBiome.Config.Commands) > 0 {
 		for _, cmd := range svc.ActiveBiome.Config.Commands {
 			parts := strings.Split(cmd, " ")
 
-			cmdr.Run(parts[0], parts[1:]...)
+			if err := cmdr.Run(parts[0], parts[1:]...); err != nil {
+				return err
+			}
 		}
 	}