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Resolves https://github.com/nushell/nushell/issues/1658 (#1660)

Browse source 
For example, when running the following:

    crates/nu-cli/src

nushell currently parses this as an external command. Before running the command, we check to see if
it's a directory. If it is, we "auto cd" into that directory, otherwise we go through normal
external processing.

If we put a trailing slash on it though, shells typically interpret that as "user is explicitly
referencing directory". So

    crates/nu-cli/src/

should not be interpreted as "run an external command". We intercept a trailing slash in the head
position of a command in a pipeline as such, and inject a `cd` internal command.
This commit is contained in:
Jason Gedge 2020-04-26 21:22:01 -04:00 committed by GitHub
parent 80025ea684
commit 6f2ef05195
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
9 changed files with 223 additions and 85 deletions
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12
crates/nu-cli/src/cli.rs
View file

@ -223,7 +223,8 @@ fn create_default_starship_config() -> Option<toml::Value> {
}
pub fn create_default_context(
syncer: &mut crate::env::environment_syncer::EnvironmentSyncer,
syncer: &mut crate::EnvironmentSyncer,
interactive: bool,
) -> Result<Context, Box<dyn Error>> {
syncer.load_environment();
@ -348,7 +349,7 @@ pub fn create_default_context(
whole_stream_command(FromIcs),
whole_stream_command(FromVcf),
// "Private" commands (not intended to be accessed directly)
whole_stream_command(RunExternalCommand),
whole_stream_command(RunExternalCommand { interactive }),
]);
cfg_if::cfg_if! {
@ -378,7 +379,7 @@ pub async fn run_vec_of_pipelines(
redirect_stdin: bool,
) -> Result<(), Box<dyn Error>> {
let mut syncer = crate::EnvironmentSyncer::new();
let mut context = crate::create_default_context(&mut syncer)?;
let mut context = create_default_context(&mut syncer, false)?;
let _ = crate::load_plugins(&mut context);
@ -477,8 +478,8 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
#[cfg(not(windows))]
const DEFAULT_COMPLETION_MODE: CompletionType = CompletionType::List;
let mut syncer = crate::env::environment_syncer::EnvironmentSyncer::new();
let mut context = create_default_context(&mut syncer)?;
let mut syncer = crate::EnvironmentSyncer::new();
let mut context = create_default_context(&mut syncer, true)?;
let _ = load_plugins(&mut context);
@ -911,7 +912,6 @@ pub fn print_err(err: ShellError, host: &dyn Host, source: &Text) {
#[cfg(test)]
mod tests {
#[quickcheck]
fn quickcheck_parse(data: String) -> bool {
if let Ok(lite_block) = nu_parser::lite_parse(&data, 0) {

17
crates/nu-cli/src/commands/cd.rs
View file

@ -1,7 +1,16 @@
use crate::commands::WholeStreamCommand;
use crate::prelude::*;
use std::path::PathBuf;
use nu_errors::ShellError;
use nu_protocol::{Signature, SyntaxShape};
use nu_source::Tagged;
#[derive(Deserialize)]
pub struct CdArgs {
pub(crate) path: Option<Tagged<PathBuf>>,
}
pub struct Cd;
@ -27,12 +36,10 @@ impl WholeStreamCommand for Cd {
args: CommandArgs,
registry: &CommandRegistry,
) -> Result<OutputStream, ShellError> {
cd(args, registry)
args.process(registry, cd)?.run()
}
}
fn cd(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
let shell_manager = args.shell_manager.clone();
let args = args.evaluate_once(registry)?;
shell_manager.cd(args)
fn cd(args: CdArgs, context: RunnableContext) -> Result<OutputStream, ShellError> {
context.shell_manager.cd(args, &context)
}

185
crates/nu-cli/src/commands/run_external.rs
View file

@ -1,29 +1,39 @@
use crate::commands::cd::CdArgs;
use crate::commands::classified::external;
use crate::commands::WholeStreamCommand;
use crate::prelude::*;
use derive_new::new;
use parking_lot::Mutex;
use std::path::PathBuf;
use nu_errors::ShellError;
use nu_protocol::hir::{Expression, ExternalArgs, ExternalCommand, Literal, SpannedExpression};
use nu_protocol::{ReturnSuccess, Signature, SyntaxShape};
use nu_source::Tagged;
#[derive(Deserialize)]
pub struct RunExternalArgs {}
#[derive(new)]
pub struct RunExternalCommand;
pub struct RunExternalCommand {
/// Whether or not nushell is being used in an interactive context
pub(crate) interactive: bool,
}
fn spanned_expression_to_string(expr: SpannedExpression) -> String {
fn spanned_expression_to_string(expr: SpannedExpression) -> Result<String, ShellError> {
if let SpannedExpression {
expr: Expression::Literal(Literal::String(s)),
..
} = expr
{
s
Ok(s)
} else {
"notacommand!!!".to_string()
Err(ShellError::labeled_error(
"Expected string for command name",
"expected string",
expr.span,
))
}
}
@ -45,7 +55,7 @@ impl WholeStreamCommand for RunExternalCommand {
args: CommandArgs,
registry: &CommandRegistry,
) -> Result<OutputStream, ShellError> {
let positionals = args.call_info.args.positional.ok_or_else(|| {
let positionals = args.call_info.args.positional.clone().ok_or_else(|| {
ShellError::untagged_runtime_error("positional arguments unexpectedly empty")
})?;
@ -53,49 +63,89 @@ impl WholeStreamCommand for RunExternalCommand {
let name = positionals
.next()
.map(spanned_expression_to_string)
.ok_or_else(|| {
ShellError::untagged_runtime_error(
"run_external unexpectedly missing external name positional arg",
)
})?;
ShellError::untagged_runtime_error("run_external called with no arguments")
})
.and_then(spanned_expression_to_string)?;
let command = ExternalCommand {
name,
name_tag: args.call_info.name_tag.clone(),
args: ExternalArgs {
list: positionals.collect(),
span: args.call_info.args.span,
},
let mut external_context = {
#[cfg(windows)]
{
Context {
registry: registry.clone(),
host: args.host.clone(),
shell_manager: args.shell_manager.clone(),
ctrl_c: args.ctrl_c.clone(),
current_errors: Arc::new(Mutex::new(vec![])),
windows_drives_previous_cwd: Arc::new(Mutex::new(
std::collections::HashMap::new(),
)),
}
}
#[cfg(not(windows))]
{
Context {
registry: registry.clone(),
host: args.host.clone(),
shell_manager: args.shell_manager.clone(),
ctrl_c: args.ctrl_c.clone(),
current_errors: Arc::new(Mutex::new(vec![])),
}
}
};
let mut external_context;
#[cfg(windows)]
{
external_context = Context {
registry: registry.clone(),
host: args.host.clone(),
shell_manager: args.shell_manager.clone(),
ctrl_c: args.ctrl_c.clone(),
current_errors: Arc::new(Mutex::new(vec![])),
windows_drives_previous_cwd: Arc::new(Mutex::new(std::collections::HashMap::new())),
};
}
#[cfg(not(windows))]
{
external_context = Context {
registry: registry.clone(),
host: args.host.clone(),
shell_manager: args.shell_manager.clone(),
ctrl_c: args.ctrl_c.clone(),
current_errors: Arc::new(Mutex::new(vec![])),
};
}
let scope = args.call_info.scope.clone();
let is_interactive = self.interactive;
let is_last = args.call_info.args.is_last;
let input = args.input;
let stream = async_stream! {
let command = ExternalCommand {
name,
name_tag: args.call_info.name_tag.clone(),
args: ExternalArgs {
list: positionals.collect(),
span: args.call_info.args.span,
},
};
// If we're in interactive mode, we will "auto cd". That is, instead of interpreting
// this as an external command, we will see it as a path and `cd` into it.
if is_interactive {
if let Some(path) = maybe_autocd_dir(&command, &mut external_context).await {
let cd_args = CdArgs {
path: Some(Tagged {
item: PathBuf::from(path),
tag: args.call_info.name_tag.clone(),
})
};
let context = RunnableContext {
input: InputStream::empty(),
shell_manager: external_context.shell_manager.clone(),
host: external_context.host.clone(),
ctrl_c: external_context.ctrl_c.clone(),
registry: external_context.registry.clone(),
name: args.call_info.name_tag.clone(),
};
let result = external_context.shell_manager.cd(cd_args, &context);
match result {
Ok(mut stream) => {
while let Some(value) = stream.next().await {
yield value;
}
},
Err(e) => {
yield Err(e);
},
_ => {}
}
return;
}
}
let scope = args.call_info.scope.clone();
let is_last = args.call_info.args.is_last;
let input = args.input;
let result = external::run_external_command(
command,
&mut external_context,
@ -120,3 +170,54 @@ impl WholeStreamCommand for RunExternalCommand {
Ok(stream.to_output_stream())
}
}
#[allow(unused_variables)]
async fn maybe_autocd_dir<'a>(cmd: &ExternalCommand, ctx: &mut Context) -> Option<String> {
// We will "auto cd" if
// - the command name ends in a path separator, or
// - it's not a command on the path and no arguments were given.
let name = &cmd.name;
let path_name = if name.ends_with(std::path::MAIN_SEPARATOR)
|| (cmd.args.is_empty()
&& PathBuf::from(name).is_dir()
&& dunce::canonicalize(name).is_ok()
&& ichwh::which(&name).await.unwrap_or(None).is_none())
{
Some(name)
} else {
None
};
path_name.map(|name| {
#[cfg(windows)]
{
if name.ends_with(':') {
// This looks like a drive shortcut. We need to a) switch drives and b) go back to the previous directory we were viewing on that drive
// But first, we need to save where we are now
let current_path = ctx.shell_manager.path();
let split_path: Vec<_> = current_path.split(':').collect();
if split_path.len() > 1 {
ctx.windows_drives_previous_cwd
.lock()
.insert(split_path[0].to_string(), current_path);
}
let name = name.to_uppercase();
let new_drive: Vec<_> = name.split(':').collect();
if let Some(val) = ctx.windows_drives_previous_cwd.lock().get(new_drive[0]) {
val.to_string()
} else {
name
}
} else {
name.to_string()
}
}
#[cfg(not(windows))]
{
name.to_string()
}
})
}

27
crates/nu-cli/src/shell/filesystem_shell.rs
View file

@ -1,3 +1,4 @@
use crate::commands::cd::CdArgs;
use crate::commands::command::EvaluatedWholeStreamCommandArgs;
use crate::commands::cp::CopyArgs;
use crate::commands::ls::LsArgs;
@ -10,9 +11,7 @@ use crate::prelude::*;
use crate::shell::completer::NuCompleter;
use crate::shell::shell::Shell;
use crate::utils::FileStructure;
use nu_errors::ShellError;
use nu_parser::expand_ndots;
use nu_protocol::{Primitive, ReturnSuccess, UntaggedValue};
use rustyline::completion::FilenameCompleter;
use rustyline::hint::{Hinter, HistoryHinter};
use std::collections::HashMap;
@ -21,6 +20,11 @@ use std::path::{Component, Path, PathBuf};
#[cfg(unix)]
use std::os::unix::fs::PermissionsExt;
use nu_errors::ShellError;
use nu_parser::expand_ndots;
use nu_protocol::{Primitive, ReturnSuccess, UntaggedValue};
use nu_source::Tagged;
pub struct FilesystemShell {
pub(crate) path: String,
pub(crate) last_path: String,
@ -171,21 +175,20 @@ impl Shell for FilesystemShell {
Ok(stream.interruptible(ctrl_c).to_output_stream())
}
fn cd(&self, args: EvaluatedWholeStreamCommandArgs) -> Result<OutputStream, ShellError> {
let path = match args.nth(0) {
fn cd(&self, args: CdArgs, name: Tag) -> Result<OutputStream, ShellError> {
let path = match args.path {
None => match dirs::home_dir() {
Some(o) => o,
_ => {
return Err(ShellError::labeled_error(
"Cannot change to home directory",
"cannot go to home",
&args.call_info.name_tag,
&name,
))
}
},
Some(v) => {
let target = v.as_path()?;
let Tagged { item: target, tag } = v;
if target == Path::new("-") {
PathBuf::from(&self.last_path)
} else {
@ -193,7 +196,7 @@ impl Shell for FilesystemShell {
ShellError::labeled_error(
"Cannot change to directory",
"directory not found",
&v.tag,
&tag,
)
})?;
@ -201,7 +204,7 @@ impl Shell for FilesystemShell {
return Err(ShellError::labeled_error(
"Cannot change to directory",
"is not a directory",
&v.tag,
&tag,
));
}
@ -216,7 +219,7 @@ impl Shell for FilesystemShell {
ShellError::labeled_error(
"Cannot change to directory",
format!("cannot stat ({})", e),
&v.tag,
&tag,
)
})?;
@ -224,7 +227,7 @@ impl Shell for FilesystemShell {
return Err(ShellError::labeled_error(
"Cannot change to directory",
"permission denied",
&v.tag,
&tag,
));
}
}

15
crates/nu-cli/src/shell/help_shell.rs
View file

@ -1,3 +1,4 @@
use crate::commands::cd::CdArgs;
use crate::commands::command::EvaluatedWholeStreamCommandArgs;
use crate::commands::cp::CopyArgs;
use crate::commands::ls::LsArgs;
@ -7,12 +8,15 @@ use crate::commands::rm::RemoveArgs;
use crate::data::command_dict;
use crate::prelude::*;
use crate::shell::shell::Shell;
use std::ffi::OsStr;
use std::path::PathBuf;
use nu_errors::ShellError;
use nu_protocol::{
Primitive, ReturnSuccess, ShellTypeName, TaggedDictBuilder, UntaggedValue, Value,
};
use std::ffi::OsStr;
use std::path::PathBuf;
use nu_source::Tagged;
#[derive(Clone, Debug)]
pub struct HelpShell {
@ -149,12 +153,11 @@ impl Shell for HelpShell {
Ok(output.into())
}
fn cd(&self, args: EvaluatedWholeStreamCommandArgs) -> Result<OutputStream, ShellError> {
let path = match args.nth(0) {
fn cd(&self, args: CdArgs, _name: Tag) -> Result<OutputStream, ShellError> {
let path = match args.path {
None => "/".to_string(),
Some(v) => {
let target = v.as_path()?;
let Tagged { item: target, .. } = v;
let mut cwd = PathBuf::from(&self.path);
if target == PathBuf::from("..") {

3
crates/nu-cli/src/shell/shell.rs
View file

@ -1,3 +1,4 @@
use crate::commands::cd::CdArgs;
use crate::commands::command::EvaluatedWholeStreamCommandArgs;
use crate::commands::cp::CopyArgs;
use crate::commands::ls::LsArgs;
@ -18,7 +19,7 @@ pub trait Shell: std::fmt::Debug {
args: LsArgs,
context: &RunnablePerItemContext,
) -> Result<OutputStream, ShellError>;
fn cd(&self, args: EvaluatedWholeStreamCommandArgs) -> Result<OutputStream, ShellError>;
fn cd(&self, args: CdArgs, name: Tag) -> Result<OutputStream, ShellError>;
fn cp(&self, args: CopyArgs, name: Tag, path: &str) -> Result<OutputStream, ShellError>;
fn mkdir(&self, args: MkdirArgs, name: Tag, path: &str) -> Result<OutputStream, ShellError>;
fn mv(&self, args: MoveArgs, name: Tag, path: &str) -> Result<OutputStream, ShellError>;

5
crates/nu-cli/src/shell/shell_manager.rs
View file

@ -1,3 +1,4 @@
use crate::commands::cd::CdArgs;
use crate::commands::command::{EvaluatedWholeStreamCommandArgs, RunnablePerItemContext};
use crate::commands::cp::CopyArgs;
use crate::commands::ls::LsArgs;
@ -141,10 +142,10 @@ impl ShellManager {
env[self.current_shell()].ls(args, context)
}
pub fn cd(&self, args: EvaluatedWholeStreamCommandArgs) -> Result<OutputStream, ShellError> {
pub fn cd(&self, args: CdArgs, context: &RunnableContext) -> Result<OutputStream, ShellError> {
let env = self.shells.lock();
env[self.current_shell()].cd(args)
env[self.current_shell()].cd(args, context.name.clone())
}
pub fn cp(

23
crates/nu-cli/src/shell/value_shell.rs
View file

@ -1,3 +1,4 @@
use crate::commands::cd::CdArgs;
use crate::commands::command::EvaluatedWholeStreamCommandArgs;
use crate::commands::cp::CopyArgs;
use crate::commands::ls::LsArgs;
@ -7,11 +8,14 @@ use crate::commands::rm::RemoveArgs;
use crate::prelude::*;
use crate::shell::shell::Shell;
use crate::utils::ValueStructure;
use nu_errors::ShellError;
use nu_protocol::{ReturnSuccess, ShellTypeName, UntaggedValue, Value};
use std::ffi::OsStr;
use std::path::{Path, PathBuf};
use nu_errors::ShellError;
use nu_protocol::{ReturnSuccess, ShellTypeName, UntaggedValue, Value};
use nu_source::Tagged;
#[derive(Clone)]
pub struct ValueShell {
pub(crate) path: String,
@ -127,19 +131,18 @@ impl Shell for ValueShell {
Ok(output.into())
}
fn cd(&self, args: EvaluatedWholeStreamCommandArgs) -> Result<OutputStream, ShellError> {
let destination = args.nth(0);
fn cd(&self, args: CdArgs, name: Tag) -> Result<OutputStream, ShellError> {
let destination = args.path;
let path = match destination {
None => "/".to_string(),
Some(v) => {
let target = v.as_path()?;
Some(ref v) => {
let Tagged { item: target, .. } = v;
let mut cwd = PathBuf::from(&self.path);
if target == PathBuf::from("..") {
if target == &PathBuf::from("..") {
cwd.pop();
} else if target == PathBuf::from("-") {
} else if target == &PathBuf::from("-") {
cwd = PathBuf::from(&self.last_path);
} else {
match target.to_str() {
@ -169,7 +172,7 @@ impl Shell for ValueShell {
return Err(ShellError::labeled_error(
"Can not change to path inside",
"No such path exists",
&args.call_info.name_tag,
&name,
));
}

21
tests/shell/pipeline/commands/external.rs
View file

@ -25,7 +25,7 @@ fn automatically_change_directory() {
use nu_test_support::playground::Playground;
Playground::setup("cd_test_5_1", |dirs, sandbox| {
sandbox.within("autodir").mkdir("bar");
sandbox.mkdir("autodir");
let actual = nu!(
cwd: dirs.test(),
@ -39,6 +39,25 @@ fn automatically_change_directory() {
})
}
#[test]
fn automatically_change_directory_with_trailing_slash_and_same_name_as_command() {
use nu_test_support::playground::Playground;
Playground::setup("cd_test_5_1", |dirs, sandbox| {
sandbox.mkdir("cd");
let actual = nu!(
cwd: dirs.test(),
r#"
cd/
pwd | echo $it
"#
);
assert!(actual.ends_with("cd"));
})
}
mod it_evaluation {
use super::nu;
use nu_test_support::fs::Stub::{EmptyFile, FileWithContent, FileWithContentToBeTrimmed};