196 lines
5.8 KiB
Rust
196 lines
5.8 KiB
Rust
use crate::database::migration::Migration;
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use crate::error::{Error, MigraResult};
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use serde::{Deserialize, Serialize};
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use std::path::{Path, PathBuf};
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use std::{env, fs, io};
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pub(crate) const MIGRA_TOML_FILENAME: &str = "Migra.toml";
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pub(crate) const DEFAULT_DATABASE_CONNECTION_ENV: &str = "$DATABASE_URL";
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fn default_database_connection_env() -> String {
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DEFAULT_DATABASE_CONNECTION_ENV.to_owned()
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}
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#[cfg(any(not(feature = "postgres"), not(feature = "mysql")))]
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macro_rules! please_install_with {
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(feature $database_name:expr) => {
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panic!(
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r#"You cannot use migra for "{database_name}".
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You need to reinstall crate with "{database_name}" feature.
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cargo install migra-cli --features ${database_name}"#,
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database_name = $database_name
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);
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};
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}
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#[derive(Debug, Serialize, Deserialize)]
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pub(crate) struct Config {
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#[serde(skip)]
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manifest_root: PathBuf,
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root: PathBuf,
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#[serde(default)]
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pub database: DatabaseConfig,
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}
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#[derive(Debug, Clone, Serialize, Deserialize)]
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#[serde(rename_all = "lowercase")]
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pub(crate) enum SupportedDatabaseClient {
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#[cfg(feature = "postgres")]
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Postgres,
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#[cfg(feature = "mysql")]
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Mysql,
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}
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impl Default for SupportedDatabaseClient {
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fn default() -> Self {
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cfg_if! {
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if #[cfg(feature = "postgres")] {
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SupportedDatabaseClient::Postgres
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} else if #[cfg(feature = "mysql")] {
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SupportedDatabaseClient::Mysql
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}
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}
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}
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}
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#[derive(Debug, Clone, Default, Serialize, Deserialize)]
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pub(crate) struct DatabaseConfig {
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pub client: Option<SupportedDatabaseClient>,
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#[serde(default = "default_database_connection_env")]
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pub connection: String,
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}
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impl DatabaseConfig {
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pub fn client(&self) -> SupportedDatabaseClient {
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self.client.clone().unwrap_or_else(|| {
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self.connection_string()
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.ok()
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.and_then(|connection_string| {
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if connection_string.starts_with("postgres://") {
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cfg_if! {
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if #[cfg(feature = "postgres")] {
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Some(SupportedDatabaseClient::Postgres)
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} else {
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please_install_with!(feature "postgres")
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}
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}
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} else if connection_string.starts_with("mysql://") {
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cfg_if! {
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if #[cfg(feature = "mysql")] {
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Some(SupportedDatabaseClient::Mysql)
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} else {
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please_install_with!(feature "mysql")
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}
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}
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} else {
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None
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}
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})
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.unwrap_or_default()
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})
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}
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pub fn connection_string(&self) -> MigraResult<String> {
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if let Some(connection_env) = self.connection.strip_prefix("$") {
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env::var(connection_env).map_err(|_| Error::MissedEnvVar(connection_env.to_string()))
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} else {
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Ok(self.connection.clone())
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}
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}
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}
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impl Default for Config {
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fn default() -> Config {
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Config {
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manifest_root: PathBuf::default(),
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root: PathBuf::from("database"),
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database: DatabaseConfig {
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connection: default_database_connection_env(),
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..Default::default()
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},
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}
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}
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}
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fn search_for_directory_containing_file(path: &Path, file_name: &str) -> MigraResult<PathBuf> {
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let file_path = path.join(file_name);
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if file_path.is_file() {
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Ok(path.to_owned())
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} else {
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path.parent()
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.ok_or(Error::RootNotFound)
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.and_then(|p| search_for_directory_containing_file(p, file_name))
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}
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}
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fn recursive_find_project_root() -> MigraResult<PathBuf> {
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let current_dir = std::env::current_dir()?;
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search_for_directory_containing_file(¤t_dir, MIGRA_TOML_FILENAME)
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}
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impl Config {
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pub fn read(config_path: Option<&PathBuf>) -> MigraResult<Config> {
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let config_path = match config_path {
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Some(config_path) if config_path.is_dir() => {
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Some(config_path.join(MIGRA_TOML_FILENAME))
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}
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Some(config_path) => Some(config_path.clone()),
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None => recursive_find_project_root()
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.map(|path| path.join(MIGRA_TOML_FILENAME))
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.ok(),
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};
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match config_path {
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None => Ok(Config::default()),
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Some(config_path) => {
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let content = fs::read_to_string(&config_path)?;
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let mut config: Config = toml::from_str(&content).expect("Cannot parse Migra.toml");
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config.manifest_root = config_path
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.parent()
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.unwrap_or_else(|| Path::new(""))
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.to_path_buf();
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Ok(config)
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}
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}
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}
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}
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impl Config {
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pub fn directory_path(&self) -> PathBuf {
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self.manifest_root.join(&self.root)
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}
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pub fn migration_dir_path(&self) -> PathBuf {
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self.directory_path().join("migrations")
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}
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pub fn migrations(&self) -> MigraResult<Vec<Migration>> {
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let mut entries = match self.migration_dir_path().read_dir() {
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Err(e) if e.kind() == io::ErrorKind::NotFound => return Ok(Vec::new()),
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entries => entries?
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.map(|res| res.map(|e| e.path()))
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.collect::<Result<Vec<_>, _>>()?,
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};
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if entries.is_empty() {
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return Ok(vec![]);
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}
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entries.sort();
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let migrations = entries
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.iter()
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.filter_map(|path| Migration::new(&path))
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.collect::<Vec<_>>();
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Ok(migrations)
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}
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}
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