use migrations_internals::search_for_migrations_directory;
use std::env;
use std::error::Error;
use std::path::{Path, PathBuf};
pub fn migration_directory_from_given_path(
given_path: Option<&str>,
) -> Result<PathBuf, Box<dyn Error + Send + Sync>> {
let cargo_toml_directory = env::var("CARGO_MANIFEST_DIR")?;
let cargo_manifest_path = Path::new(&cargo_toml_directory);
let migrations_path = given_path.as_ref().map(Path::new);
resolve_migrations_directory(cargo_manifest_path, migrations_path)
}
fn resolve_migrations_directory(
cargo_manifest_dir: &Path,
relative_path_to_migrations: Option<&Path>,
) -> Result<PathBuf, Box<dyn Error + Send + Sync>> {
let result = match relative_path_to_migrations {
Some(dir) => cargo_manifest_dir.join(dir),
None => {
let src_dir = cargo_manifest_dir.join("src");
search_for_migrations_directory(&src_dir).ok_or_else(|| {
format!(
"Failed to find migration directory in {}",
src_dir.display()
)
})?
}
};
result.canonicalize().map_err(Into::into)
}
#[cfg(test)]
mod tests {
use tempfile;
use self::tempfile::Builder;
use super::resolve_migrations_directory;
use std::fs;
use std::path::Path;
#[test]
fn migrations_directory_resolved_relative_to_cargo_manifest_dir() {
let tempdir = Builder::new().prefix("diesel").tempdir().unwrap();
fs::create_dir_all(tempdir.path().join("foo/special_migrations")).unwrap();
let cargo_manifest_dir = tempdir.path().join("foo");
let relative_path = Some(Path::new("special_migrations"));
assert_eq!(
tempdir
.path()
.join("foo/special_migrations")
.canonicalize()
.ok(),
resolve_migrations_directory(&cargo_manifest_dir, relative_path).ok()
);
}
#[test]
fn migrations_directory_canonicalizes_result() {
let tempdir = Builder::new().prefix("diesel").tempdir().unwrap();
fs::create_dir_all(tempdir.path().join("foo/migrations/bar")).unwrap();
fs::create_dir_all(tempdir.path().join("foo/bar")).unwrap();
let cargo_manifest_dir = tempdir.path().join("foo/bar");
let relative_path = Some(Path::new("../migrations/bar"));
assert_eq!(
tempdir
.path()
.join("foo/migrations/bar")
.canonicalize()
.ok(),
resolve_migrations_directory(&cargo_manifest_dir, relative_path).ok()
);
}
#[test]
fn migrations_directory_defaults_to_searching_migrations_path() {
let tempdir = Builder::new().prefix("diesel").tempdir().unwrap();
fs::create_dir_all(tempdir.path().join("foo/migrations")).unwrap();
fs::create_dir_all(tempdir.path().join("foo/bar")).unwrap();
let cargo_manifest_dir = tempdir.path().join("foo/bar");
assert_eq!(
tempdir.path().join("foo/migrations").canonicalize().ok(),
resolve_migrations_directory(&cargo_manifest_dir, None).ok()
);
}
#[test]
fn migrations_directory_searches_src_migrations_if_present() {
let tempdir = Builder::new().prefix("diesel").tempdir().unwrap();
fs::create_dir_all(tempdir.path().join("foo/src/migrations")).unwrap();
fs::create_dir_all(tempdir.path().join("foo/migrations")).unwrap();
let cargo_manifest_dir = tempdir.path().join("foo");
assert_eq!(
tempdir
.path()
.join("foo/src/migrations")
.canonicalize()
.ok(),
resolve_migrations_directory(&cargo_manifest_dir, None).ok()
);
}
#[test]
fn migrations_directory_allows_no_parent_dir_for_cargo_manifest_dir() {
let tempdir = Builder::new().prefix("diesel").tempdir().unwrap();
fs::create_dir_all(tempdir.path().join("special_migrations")).unwrap();
let cargo_manifest_dir = tempdir.path().to_owned();
let relative_path = Some(Path::new("special_migrations"));
assert_eq!(
tempdir
.path()
.join("special_migrations")
.canonicalize()
.ok(),
resolve_migrations_directory(&cargo_manifest_dir, relative_path).ok()
);
}
}