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Auto merge of #10082 - basile-henry:basile/alias-shadow-external-warning, r=ehuss
Warn when alias shadows external subcommand As per #10049, we start by emitting a warning when an alias shadows an existing external subcommand. After a transition period (duration not specified), we will make this a hard error. Should the warning mention that this will become a hard error?
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commit
ad50d0d266
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@ -261,6 +261,21 @@ fn expand_aliases(
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}
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(None, None) => {}
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(_, Some(mut alias)) => {
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// Check if this alias is shadowing an external subcommand
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// (binary of the form `cargo-<subcommand>`)
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// Currently this is only a warning, but after a transition period this will become
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// a hard error.
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if let Some(path) = super::find_external_subcommand(config, cmd) {
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config.shell().warn(format!(
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"\
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user-defined alias `{}` is shadowing an external subcommand found at: `{}`
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This was previously accepted but is being phased out; it will become a hard error in a future release.
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For more information, see issue #10049 <https://github.com/rust-lang/cargo/issues/10049>.",
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cmd,
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path.display(),
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))?;
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}
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alias.extend(
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args.values_of("")
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.unwrap_or_default()
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@ -147,12 +147,16 @@ fn list_commands(config: &Config) -> BTreeMap<String, CommandInfo> {
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commands
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}
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fn execute_external_subcommand(config: &Config, cmd: &str, args: &[&str]) -> CliResult {
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fn find_external_subcommand(config: &Config, cmd: &str) -> Option<PathBuf> {
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let command_exe = format!("cargo-{}{}", cmd, env::consts::EXE_SUFFIX);
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let path = search_directories(config)
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search_directories(config)
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.iter()
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.map(|dir| dir.join(&command_exe))
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.find(|file| is_executable(file));
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.find(|file| is_executable(file))
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}
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fn execute_external_subcommand(config: &Config, cmd: &str, args: &[&str]) -> CliResult {
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let path = find_external_subcommand(config, cmd);
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let command = match path {
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Some(command) => command,
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None => {
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@ -76,6 +76,38 @@ fn dependent_alias() {
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.run();
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}
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#[cargo_test]
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fn alias_shadowing_external_subcommand() {
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let echo = echo_subcommand();
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let p = project()
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.file("Cargo.toml", &basic_bin_manifest("foo"))
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.file("src/main.rs", "fn main() {}")
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.file(
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".cargo/config",
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r#"
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[alias]
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echo = "build"
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"#,
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)
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.build();
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let mut paths: Vec<_> = env::split_paths(&env::var_os("PATH").unwrap_or_default()).collect();
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paths.push(echo.target_debug_dir());
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let path = env::join_paths(paths).unwrap();
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p.cargo("echo")
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.env("PATH", &path)
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.with_stderr("\
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[WARNING] user-defined alias `echo` is shadowing an external subcommand found at: `[ROOT]/cargo-echo/target/debug/cargo-echo[EXE]`
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This was previously accepted but is being phased out; it will become a hard error in a future release.
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For more information, see issue #10049 <https://github.com/rust-lang/cargo/issues/10049>.
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[COMPILING] foo v0.5.0 [..]
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[FINISHED] dev [unoptimized + debuginfo] target(s) in [..]
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",
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)
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.run();
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}
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#[cargo_test]
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fn default_args_alias() {
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let echo = echo_subcommand();
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@ -100,14 +132,24 @@ fn default_args_alias() {
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p.cargo("echo")
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.env("PATH", &path)
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.with_status(101)
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.with_stderr("error: alias echo has unresolvable recursive definition: echo -> echo")
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.with_stderr("\
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[WARNING] user-defined alias `echo` is shadowing an external subcommand found at: `[ROOT]/cargo-echo/target/debug/cargo-echo[EXE]`
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This was previously accepted but is being phased out; it will become a hard error in a future release.
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For more information, see issue #10049 <https://github.com/rust-lang/cargo/issues/10049>.
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error: alias echo has unresolvable recursive definition: echo -> echo
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",
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)
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.run();
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p.cargo("test-1")
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.env("PATH", &path)
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.with_status(101)
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.with_stderr(
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"error: alias test-1 has unresolvable recursive definition: test-1 -> echo -> echo",
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.with_stderr("\
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[WARNING] user-defined alias `echo` is shadowing an external subcommand found at: `[ROOT]/cargo-echo/target/debug/cargo-echo[EXE]`
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This was previously accepted but is being phased out; it will become a hard error in a future release.
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For more information, see issue #10049 <https://github.com/rust-lang/cargo/issues/10049>.
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error: alias test-1 has unresolvable recursive definition: test-1 -> echo -> echo
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",
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)
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.run();
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