env module now properly supports config file

src/build/cli.v

@@ -8,7 +8,8 @@ pub fn cmd() cli.Command {
 		name: 'build'
 		description: 'Run the build process.'
 		execute: fn (cmd cli.Command) ? {
-			conf := env.load<env.BuildConfig>() ?
+			config_file := cmd.flags.get_string('config-file') ?
+			conf := env.load<env.BuildConfig>(config_file) ?
 
 			build(conf) ?
 		}

src/env.v

@@ -1,6 +1,7 @@
 module env
 
 import os
+import toml
 
 // The prefix that every environment variable should have
 const prefix = 'VIETER_'
@@ -32,9 +33,9 @@ fn get_env_var(field_name string) ?string {
 	env_var := os.getenv(env_var_name)
 	env_file := os.getenv(env_file_name)
 
-	// If both aren't set, we report them missing
+	// If both are missing, we return an empty string
 	if env_var == '' && env_file == '' {
-		return error('Either $env_var_name or $env_file_name is required.')
+		return ''
 	}
 
 	// If they're both set, we report a conflict
@@ -56,37 +57,47 @@ fn get_env_var(field_name string) ?string {
 	}
 }
 
-fn load_in_place<T>(mut o T) ? {
-	$for field in T.fields {
-		o.$(field.name) = get_env_var(field.name) or {
-			// We use the default instead, if it's present
-			mut default := ''
-
-			for attr in field.attrs {
-				if attr.starts_with('default: ') {
-					default = attr[9..]
-					break
-				}
-			}
-
-			if default == '' {
-				return err
-			}
-
-			default
-		}
-	}
-}
-
 // load<T> attempts to create the given type from environment variables. For
 // each field, the corresponding env var is its name in uppercase prepended
 // with the hardcoded prefix. If this one isn't present, it looks for the env
 // var with the file_suffix suffix.
-pub fn load<T>() ?T {
+pub fn load<T>(path string) ?T {
 	mut res := T{}
 
-	load_in_place<T>(mut res) ?
+	if os.exists(path) {
+		res = toml.parse_file(path) ?.reflect<T>()
+	}
 
+	$for field in T.fields {
+		$if field.typ is string {
+			env_value := get_env_var(field.name) ?
+
+			// The value of the env var will always be chosen over the config
+			// file
+			if env_value != '' {
+				res.$(field.name) = env_value
+			}
+			// If there's no value from the toml file either, we try to find a
+			// default value
+			else if res.$(field.name) == '' {
+				// We use the default instead, if it's present
+				mut default := ''
+
+				for attr in field.attrs {
+					if attr.starts_with('default: ') {
+						default = attr[9..]
+						break
+					}
+				}
+
+				if default == '' {
+					return error("Missing config variable '$field.name' with no provided default. Either add it to the config file or provide it using an environment variable.")
+				}
+
+				res.$(field.name) = default
+			}
+		}
+	}
 	return res
 }
 

src/git/cli.v

@@ -18,7 +18,8 @@ pub fn cmd() cli.Command {
 				name: 'list'
 				description: 'List the current repos.'
 				execute: fn (cmd cli.Command) ? {
-					conf := env.load<Config>() ?
+					config_file := cmd.flags.get_string('config-file') ?
+					conf := env.load<Config>(config_file) ?
 
 					list(conf) ?
 				}
@@ -29,7 +30,8 @@ pub fn cmd() cli.Command {
 				usage: 'url branch'
 				description: 'Add a new repository.'
 				execute: fn (cmd cli.Command) ? {
-					conf := env.load<Config>() ?
+					config_file := cmd.flags.get_string('config-file') ?
+					conf := env.load<Config>(config_file) ?
 
 					add(conf, cmd.args[0], cmd.args[1]) ?
 				}
@@ -40,7 +42,8 @@ pub fn cmd() cli.Command {
 				usage: 'url branch'
 				description: 'Remove a repository.'
 				execute: fn (cmd cli.Command) ? {
-					conf := env.load<Config>() ?
+					config_file := cmd.flags.get_string('config-file') ?
+					conf := env.load<Config>(config_file) ?
 
 					remove(conf, cmd.args[0], cmd.args[1]) ?
 				}
@@ -59,7 +62,8 @@ fn list(conf Config) ? {
 }
 
 fn add(conf Config, url string, branch string) ? {
-	mut req := http.new_request(http.Method.post, '$conf.address/api/repos?url=$url&branch=$branch', '') ?
+	mut req := http.new_request(http.Method.post, '$conf.address/api/repos?url=$url&branch=$branch',
+		'') ?
 	req.add_custom_header('X-API-Key', conf.api_key) ?
 
 	res := req.do() ?
@@ -68,7 +72,8 @@ fn add(conf Config, url string, branch string) ? {
 }
 
 fn remove(conf Config, url string, branch string) ? {
-	mut req := http.new_request(http.Method.delete, '$conf.address/api/repos?url=$url&branch=$branch', '') ?
+	mut req := http.new_request(http.Method.delete, '$conf.address/api/repos?url=$url&branch=$branch',
+		'') ?
 	req.add_custom_header('X-API-Key', conf.api_key) ?
 
 	res := req.do() ?

src/server/cli.v

@@ -8,7 +8,8 @@ pub fn cmd() cli.Command {
 		name: 'server'
 		description: 'Start the Vieter server'
 		execute: fn (cmd cli.Command) ? {
-			conf := env.load<env.ServerConfig>() ?
+			config_file := cmd.flags.get_string('config-file') ?
+			conf := env.load<env.ServerConfig>(config_file) ?
 
 			server(conf) ?
 		}