settings.v

1//! Machine-wide remote settings.2//!3//! Everything machine-specific lives in `~/.config/koh/`, never inside a repo:4//! one remote per machine, and the S3 keys in a file only the user can read.5//! The format is plain `key=value` lines so it can be read and edited by hand.67module machine89import os1011pub const remote_file = 'remote'12pub const credentials_file = 'credentials'1314pub const kind_folder = 'folder'15pub const kind_s3 = 's3'1617pub struct RemoteSettings {18pub:19	kind     string20	path     string // folder backend21	endpoint string // s3 backend22	bucket   string23	region   string24}2526pub struct Credentials {27pub:28	access_key string29	secret_key string30}3132pub fn save_remote(settings RemoteSettings) ! {33	os.mkdir_all(config_dir(), os.MkdirParams{})!34	mut text := '# written by koh remote — the remote for every repo on this machine\n'35	text += 'kind=${settings.kind}\n'36	if settings.kind == kind_folder {37		text += 'path=${settings.path}\n'38	} else {39		text += 'endpoint=${settings.endpoint}\n'40		text += 'bucket=${settings.bucket}\n'41		text += 'region=${settings.region}\n'42	}43	os.write_file(config_path(remote_file), text)!44}4546pub fn load_remote() !RemoteSettings {47	text := os.read_file(config_path(remote_file)) or {48		return error('this machine has no remote yet — run "koh remote"')49	}50	values := parse_config(text)51	settings := RemoteSettings{52		kind:     values['kind'] or { '' }53		path:     values['path'] or { '' }54		endpoint: values['endpoint'] or { '' }55		bucket:   values['bucket'] or { '' }56		region:   values['region'] or { '' }57	}58	if settings.kind !in [kind_folder, kind_s3] {59		return error('the remote setting in ${config_path(remote_file)} is not readable — run "koh remote" again')60	}61	return settings62}6364pub fn has_remote() bool {65	return os.is_file(config_path(remote_file))66}6768pub fn forget_remote() ! {69	if os.exists(config_path(remote_file)) {70		os.rm(config_path(remote_file))!71	}72}7374// save_credentials writes the keys so that only the user can read them.75pub fn save_credentials(credentials Credentials) ! {76	os.mkdir_all(config_dir(), os.MkdirParams{})!77	mut text := '# written by koh remote — keep this file private\n'78	text += 'access_key=${credentials.access_key}\n'79	text += 'secret_key=${credentials.secret_key}\n'80	path := config_path(credentials_file)81	os.write_file(path, text)!82	os.chmod(path, 0o600)!83}8485pub fn load_credentials() !Credentials {86	text := os.read_file(config_path(credentials_file)) or {87		return error('this machine has no S3 keys yet — run "koh remote"')88	}89	values := parse_config(text)90	credentials := Credentials{91		access_key: values['access_key'] or { '' }92		secret_key: values['secret_key'] or { '' }93	}94	if credentials.access_key == '' || credentials.secret_key == '' {95		return error('the S3 keys in ${config_path(credentials_file)} are incomplete — run "koh remote" again')96	}97	return credentials98}99100fn parse_config(text string) map[string]string {101	mut values := map[string]string{}102	for line in text.split_into_lines() {103		trimmed := line.trim_space()104		if trimmed == '' || trimmed.starts_with('#') {105			continue106		}107		at := trimmed.index('=') or { continue }108		values[trimmed[..at].trim_space()] = trimmed[at + 1..].trim_space()109	}110	return values111}