refactor: migrated env code to own external module

README.md

@@ -41,6 +41,10 @@ Besides a V installer, Vieter also requires the following libraries to work:
 * openssl
 * sqlite3
 
+Vieter also depends on some external V modules which you can install using `cd
+src && v install`. Make sure to keep these dependencies up to date using `v
+update`.
+
 ### Compiler
 
 Vieter compiles with the standard Vlang compiler. However, I do maintain a

src/console/git/git.v

@@ -1,7 +1,7 @@
 module git
 
 import cli
-import env
+import vieter.vconf
 import cron.expression { parse_expression }
 import client
 import console
@@ -41,7 +41,7 @@ pub fn cmd() cli.Command {
 				]
 				execute: fn (cmd cli.Command) ? {
 					config_file := cmd.flags.get_string('config-file')?
-					conf := env.load<Config>(config_file)?
+					conf := vconf.load<Config>(default_path: config_file)?
 
 					mut filter := GitRepoFilter{}
 
@@ -70,7 +70,7 @@ pub fn cmd() cli.Command {
 				description: 'Add a new repository.'
 				execute: fn (cmd cli.Command) ? {
 					config_file := cmd.flags.get_string('config-file')?
-					conf := env.load<Config>(config_file)?
+					conf := vconf.load<Config>(default_path: config_file)?
 
 					add(conf, cmd.args[0], cmd.args[1], cmd.args[2])?
 				}
@@ -82,7 +82,7 @@ pub fn cmd() cli.Command {
 				description: 'Remove a repository that matches the given ID prefix.'
 				execute: fn (cmd cli.Command) ? {
 					config_file := cmd.flags.get_string('config-file')?
-					conf := env.load<Config>(config_file)?
+					conf := vconf.load<Config>(default_path: config_file)?
 
 					remove(conf, cmd.args[0])?
 				}
@@ -94,7 +94,7 @@ pub fn cmd() cli.Command {
 				description: 'Show detailed information for the repo matching the ID prefix.'
 				execute: fn (cmd cli.Command) ? {
 					config_file := cmd.flags.get_string('config-file')?
-					conf := env.load<Config>(config_file)?
+					conf := vconf.load<Config>(default_path: config_file)?
 
 					info(conf, cmd.args[0])?
 				}
@@ -133,7 +133,7 @@ pub fn cmd() cli.Command {
 				]
 				execute: fn (cmd cli.Command) ? {
 					config_file := cmd.flags.get_string('config-file')?
-					conf := env.load<Config>(config_file)?
+					conf := vconf.load<Config>(default_path: config_file)?
 
 					found := cmd.flags.get_all_found()
 
@@ -155,7 +155,7 @@ pub fn cmd() cli.Command {
 				description: 'Build the repo with the given id & publish it.'
 				execute: fn (cmd cli.Command) ? {
 					config_file := cmd.flags.get_string('config-file')?
-					conf := env.load<Config>(config_file)?
+					conf := vconf.load<Config>(default_path: config_file)?
 
 					build(conf, cmd.args[0].int())?
 				}

src/console/logs/logs.v

@@ -1,7 +1,7 @@
 module logs
 
 import cli
-import env
+import vieter.vconf
 import client
 import console
 import time
@@ -65,7 +65,7 @@ pub fn cmd() cli.Command {
 				]
 				execute: fn (cmd cli.Command) ? {
 					config_file := cmd.flags.get_string('config-file')?
-					conf := env.load<Config>(config_file)?
+					conf := vconf.load<Config>(default_path: config_file)?
 
 					mut filter := BuildLogFilter{}
 
@@ -143,7 +143,7 @@ pub fn cmd() cli.Command {
 				description: 'Show all info for a specific build log.'
 				execute: fn (cmd cli.Command) ? {
 					config_file := cmd.flags.get_string('config-file')?
-					conf := env.load<Config>(config_file)?
+					conf := vconf.load<Config>(default_path: config_file)?
 
 					id := cmd.args[0].int()
 					info(conf, id)?
@@ -156,7 +156,7 @@ pub fn cmd() cli.Command {
 				description: 'Output the content of a build log to stdout.'
 				execute: fn (cmd cli.Command) ? {
 					config_file := cmd.flags.get_string('config-file')?
-					conf := env.load<Config>(config_file)?
+					conf := vconf.load<Config>(default_path: config_file)?
 
 					id := cmd.args[0].int()
 					content(conf, id)?

src/cron/cli.v

@@ -1,7 +1,7 @@
 module cron
 
 import cli
-import env
+import vieter.vconf
 
 struct Config {
 pub:
@@ -24,7 +24,7 @@ pub fn cmd() cli.Command {
 		description: 'Start the cron service that periodically runs builds.'
 		execute: fn (cmd cli.Command) ? {
 			config_file := cmd.flags.get_string('config-file')?
-			conf := env.load<Config>(config_file)?
+			conf := vconf.load<Config>(default_path: config_file)?
 
 			cron(conf)?
 		}

src/env/README.md

@@ -1,7 +0,0 @@
-This module provides a framework for parsing a configuration, defined as a
-struct, from both a TOML configuration file & environment variables. Some
-notable features are:
-
-* Overwrite values in config file using environment variables
-* Allow default values in config struct
-* Read environment variable value from file

src/env/env.v

@@ -1,102 +0,0 @@
-module env
-
-import os
-import toml
-
-const (
-	// The prefix that every environment variable should have
-	prefix      = 'VIETER_'
-	// The suffix an environment variable in order for it to be loaded from a file
-	// instead
-	file_suffix = '_FILE'
-)
-
-// get_env_var tries to read the contents of the given environment variable. It
-// looks for either `${env.prefix}${field_name.to_upper()}` or
-// `${env.prefix}${field_name.to_upper()}${env.file_suffix}`, returning the
-// contents of the file instead if the latter. If both or neither exist, the
-// function returns an error.
-fn get_env_var(field_name string) ?string {
-	env_var_name := '$env.prefix$field_name.to_upper()'
-	env_file_name := '$env.prefix$field_name.to_upper()$env.file_suffix'
-	env_var := os.getenv(env_var_name)
-	env_file := os.getenv(env_file_name)
-
-	// If both are missing, we return an empty string
-	if env_var == '' && env_file == '' {
-		return ''
-	}
-
-	// If they're both set, we report a conflict
-	if env_var != '' && env_file != '' {
-		return error('Only one of $env_var_name or $env_file_name can be defined.')
-	}
-
-	// If it's the env var itself, we return it.
-	// I'm pretty sure this also prevents variable ending in _FILE (e.g.
-	// VIETER_LOG_FILE) from being mistakingely read as an _FILE suffixed env
-	// var.
-	if env_var != '' {
-		return env_var
-	}
-
-	// Otherwise, we process the file
-	return os.read_file(env_file) or {
-		error('Failed to read file defined in $env_file_name: ${err.msg()}.')
-	}
-}
-
-// load<T> attempts to create an object of type T from the given path to a toml
-// file & environment variables. For each field, it will select either a value
-// given from an environment variable, a value defined in the config file or a
-// configured default if present, in that order.
-pub fn load<T>(path string) ?T {
-	mut res := T{}
-
-	if os.exists(path) {
-		// We don't use reflect here because reflect also sets any fields not
-		// in the toml back to their zero value, which we don't want
-		doc := toml.parse_file(path)?
-
-		$for field in T.fields {
-			s := doc.value(field.name)
-
-			if s !is toml.Null {
-				$if field.typ is string {
-					res.$(field.name) = s.string()
-				} $else $if field.typ is int {
-					res.$(field.name) = s.int()
-				}
-			}
-		}
-	}
-
-	$for field in T.fields {
-		env_value := get_env_var(field.name)?
-
-		// The value of an env var will always take precedence over the toml
-		// file.
-		if env_value != '' {
-			$if field.typ is string {
-				res.$(field.name) = env_value
-			} $else $if field.typ is int {
-				res.$(field.name) = env_value.int()
-			}
-		}
-
-		// Now, we check whether a value is present. If there isn't, that means
-		// it isn't in the config file, nor is there a default or an env var.
-		mut has_value := false
-
-		$if field.typ is string {
-			has_value = res.$(field.name) != ''
-		} $else $if field.typ is int {
-			has_value = res.$(field.name) != 0
-		}
-
-		if !has_value {
-			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.")
-		}
-	}
-	return res
-}

src/server/cli.v

@@ -1,7 +1,7 @@
 module server
 
 import cli
-import env
+import vieter.vconf
 
 struct Config {
 pub:
@@ -19,7 +19,7 @@ pub fn cmd() cli.Command {
 		description: 'Start the Vieter server.'
 		execute: fn (cmd cli.Command) ? {
 			config_file := cmd.flags.get_string('config-file')?
-			conf := env.load<Config>(config_file)?
+			conf := vconf.load<Config>(default_path: config_file)?
 
 			server(conf)?
 		}

src/v.mod

@@ -0,0 +1,5 @@
+Module {
+    dependencies: [
+        'https://git.rustybever.be/vieter/vconf'
+    ]
+}