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Update errors and improve ctrl-c

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This commit is contained in:
Jonathan Turner 2019-06-16 06:36:17 +12:00
parent 910869b79d
commit 54be5bf16e
17 changed files with 139 additions and 137 deletions
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67
src/cli.rs
View file

@ -101,13 +101,10 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
cc.store(true, Ordering::SeqCst);
})
.expect("Error setting Ctrl-C handler");
let mut ctrlcbreak = false;
loop {
if ctrl_c.load(Ordering::SeqCst) {
ctrl_c.store(false, Ordering::SeqCst);
if let ShellError::String(s) = ShellError::string("CTRL-C") {
context.host.lock().unwrap().stdout(&format!("{:?}", s));
}
continue;
}
@ -133,6 +130,20 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
rl.add_history_entry(line.clone());
}
LineResult::CtrlC => {
if ctrlcbreak {
std::process::exit(0);
} else {
context
.host
.lock()
.unwrap()
.stdout("CTRL-C pressed (again to quit)");
ctrlcbreak = true;
continue;
}
}
LineResult::Error(mut line, err) => match err {
ShellError::Diagnostic(diag) => {
let host = context.host.lock().unwrap();
@ -176,6 +187,7 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
.stdout(&format!("A surprising fatal error occurred.\n{:?}", err));
}
}
ctrlcbreak = false;
}
rl.save_history("history.txt").unwrap();
@ -185,6 +197,7 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
enum LineResult {
Success(String),
Error(String, ShellError),
CtrlC,
Break,
#[allow(unused)]
@ -200,6 +213,7 @@ impl std::ops::Try for LineResult {
LineResult::Success(s) => Ok(Some(s)),
LineResult::Error(_, s) => Err(s),
LineResult::Break => Ok(None),
LineResult::CtrlC => Ok(None),
LineResult::FatalError(err) => Err(err),
}
}
@ -258,27 +272,26 @@ async fn process_line(readline: Result<String, ReadlineError>, ctx: &mut Context
(None, _) => break,
(Some(ClassifiedCommand::Expr(_)), _) => {
return LineResult::Error(line.clone(), ShellError::unimplemented(
"Expression-only commands",
))
return LineResult::Error(
line.clone(),
ShellError::unimplemented("Expression-only commands"),
)
}
(_, Some(ClassifiedCommand::Expr(_))) => {
return LineResult::Error(line.clone(), ShellError::unimplemented(
"Expression-only commands",
))
return LineResult::Error(
line.clone(),
ShellError::unimplemented("Expression-only commands"),
)
}
(Some(ClassifiedCommand::Sink(_)), Some(_)) => {
return LineResult::Error(line.clone(), ShellError::string("Commands like table, save, and autoview must come last in the pipeline"))
(Some(ClassifiedCommand::Sink(SinkCommand { name_span, .. })), Some(_)) => {
return LineResult::Error(line.clone(), ShellError::maybe_labeled_error("Commands like table, save, and autoview must come last in the pipeline", "must come last", name_span));
}
(Some(ClassifiedCommand::Sink(left)), None) => {
let input_vec: Vec<Value> = input.objects.collect().await;
left.run(
ctx,
input_vec,
)?;
left.run(ctx, input_vec)?;
break;
}
@ -290,13 +303,12 @@ async fn process_line(readline: Result<String, ReadlineError>, ctx: &mut Context
Err(err) => return LineResult::Error(line.clone(), err),
},
(
Some(ClassifiedCommand::Internal(left)),
Some(_),
) => match left.run(ctx, input).await {
(Some(ClassifiedCommand::Internal(left)), Some(_)) => {
match left.run(ctx, input).await {
Ok(val) => ClassifiedInputStream::from_input_stream(val),
Err(err) => return LineResult::Error(line.clone(), err),
},
}
}
(Some(ClassifiedCommand::Internal(left)), None) => {
match left.run(ctx, input).await {
@ -313,13 +325,12 @@ async fn process_line(readline: Result<String, ReadlineError>, ctx: &mut Context
Err(err) => return LineResult::Error(line.clone(), err),
},
(
Some(ClassifiedCommand::External(left)),
Some(_),
) => match left.run(ctx, input, StreamNext::Internal).await {
(Some(ClassifiedCommand::External(left)), Some(_)) => {
match left.run(ctx, input, StreamNext::Internal).await {
Ok(val) => val,
Err(err) => return LineResult::Error(line.clone(), err),
},
}
}
(Some(ClassifiedCommand::External(left)), None) => {
match left.run(ctx, input, StreamNext::Last).await {
@ -332,9 +343,7 @@ async fn process_line(readline: Result<String, ReadlineError>, ctx: &mut Context
LineResult::Success(line.clone())
}
Err(ReadlineError::Interrupted) => {
LineResult::Error("".to_string(), ShellError::string("CTRL-C"))
}
Err(ReadlineError::Interrupted) => LineResult::CtrlC,
Err(ReadlineError::Eof) => {
println!("CTRL-D");
LineResult::Break

16
src/commands/cd.rs
View file

@ -13,17 +13,23 @@ pub fn cd(args: CommandArgs) -> Result<OutputStream, ShellError> {
let path = match args.positional.first() {
None => match dirs::home_dir() {
Some(o) => o,
_ => return Err(ShellError::string("Can not change to home directory")),
_ => {
return Err(ShellError::maybe_labeled_error(
"Can not change to home directory",
"can not go to home",
args.name_span,
))
}
},
Some(v) => {
let target = v.as_string()?.clone();
match dunce::canonicalize(cwd.join(&target).as_path()) {
Ok(p) => p,
Err(_) => {
return Err(ShellError::labeled_error(
return Err(ShellError::maybe_labeled_error(
"Can not change to directory",
"directory not found",
args.positional[0].span.clone(),
Some(args.positional[0].span.clone()),
));
}
}
@ -35,10 +41,10 @@ pub fn cd(args: CommandArgs) -> Result<OutputStream, ShellError> {
Ok(_) => {}
Err(_) => {
if args.positional.len() > 0 {
return Err(ShellError::labeled_error(
return Err(ShellError::maybe_labeled_error(
"Can not change to directory",
"directory not found",
args.positional[0].span.clone(),
Some(args.positional[0].span.clone()),
));
} else {
return Err(ShellError::string("Can not change to directory"));

32
src/commands/classified.rs
View file

@ -151,38 +151,6 @@ impl InternalCommand {
}
}
}
/*
let stream = result.filter_map(move |v| match v {
//ReturnValue::Value(Value::Error(err)) => futures::future::err(Err(err)),
ReturnValue::Action(action) => match action {
CommandAction::ChangePath(path) => {
env.lock().unwrap().last_mut().map(|x| {
x.path = path;
x
});
futures::future::ready(None)
}
CommandAction::Enter(obj) => {
let new_env = Environment {
obj: obj,
path: PathBuf::from("/"),
};
env.lock().unwrap().push(new_env);
futures::future::ready(None)
}
CommandAction::Exit => {
let mut v = env.lock().unwrap();
if v.len() == 1 {
std::process::exit(0);
}
v.pop();
futures::future::ready(None)
}
},
ReturnValue::Value(v) => futures::future::ready(Some(v)),
});
*/
Ok(stream.boxed() as InputStream)
}
}

6
src/commands/enter.rs
View file

@ -7,7 +7,11 @@ use std::path::{Path, PathBuf};
pub fn enter(args: CommandArgs) -> Result<OutputStream, ShellError> {
if args.positional.len() == 0 {
return Err(ShellError::string("open requires a filepath or url"));
return Err(ShellError::maybe_labeled_error(
"open requires a path or url",
"missing path",
args.name_span,
));
}
let cwd = args

8
src/commands/first.rs
View file

@ -5,15 +5,11 @@ use crate::prelude::*;
pub fn first(args: CommandArgs) -> Result<OutputStream, ShellError> {
if args.positional.len() == 0 {
if let Some(span) = args.name_span {
return Err(ShellError::labeled_error(
return Err(ShellError::maybe_labeled_error(
"First requires an amount",
"needs parameter",
span,
args.name_span,
));
} else {
return Err(ShellError::string("first requires an amount."));
}
}
let amount = args.positional[0].as_i64();

11
src/commands/from_xml.rs
View file

@ -57,11 +57,16 @@ pub fn from_xml_string_to_value(s: String) -> Value {
pub fn from_xml(args: CommandArgs) -> Result<OutputStream, ShellError> {
let out = args.input;
let span = args.name_span;
Ok(out
.map(|a| match a {
Value::Primitive(Primitive::String(s)) => ReturnValue::Value(from_xml_string_to_value(s)),
_ => ReturnValue::Value(Value::Error(Box::new(ShellError::string(
.map(move |a| match a {
Value::Primitive(Primitive::String(s)) => {
ReturnValue::Value(from_xml_string_to_value(s))
}
_ => ReturnValue::Value(Value::Error(Box::new(ShellError::maybe_labeled_error(
"Trying to convert XML from non-string".to_string(),
"given non-string",
span,
)))),
})
.boxed())

10
src/commands/get.rs
View file

@ -11,7 +11,7 @@ fn get_member(path: &str, span: Span, obj: &Value) -> Option<Value> {
None => {
return Some(Value::Error(Box::new(ShellError::labeled_error(
"Unknown field",
"unknown field",
"object missing field",
span,
))));
}
@ -23,15 +23,11 @@ fn get_member(path: &str, span: Span, obj: &Value) -> Option<Value> {
pub fn get(args: CommandArgs) -> Result<OutputStream, ShellError> {
if args.positional.len() == 0 {
if let Some(span) = args.name_span {
return Err(ShellError::labeled_error(
return Err(ShellError::maybe_labeled_error(
"Get requires a field or field path",
"needs parameter",
span,
args.name_span,
));
} else {
return Err(ShellError::string("get requires fields."));
}
}
let amount = args.positional[0].as_i64();

6
src/commands/ls.rs
View file

@ -31,7 +31,11 @@ pub fn ls(args: CommandArgs) -> Result<OutputStream, ShellError> {
s.span,
));
} else {
return Err(ShellError::string(e.to_string()));
return Err(ShellError::maybe_labeled_error(
e.to_string(),
e.to_string(),
args.name_span,
));
}
}
Ok(o) => o,

6
src/commands/open.rs
View file

@ -6,7 +6,11 @@ use std::path::{Path, PathBuf};
pub fn open(args: CommandArgs) -> Result<OutputStream, ShellError> {
if args.positional.len() == 0 {
return Err(ShellError::string("open requires a filepath or url"));
return Err(ShellError::maybe_labeled_error(
"Open requires a path or url",
"needs path or url",
args.name_span,
));
}
let cwd = args

8
src/commands/pick.rs
View file

@ -5,15 +5,11 @@ use crate::prelude::*;
pub fn pick(args: CommandArgs) -> Result<OutputStream, ShellError> {
if args.positional.len() == 0 {
if let Some(span) = args.name_span {
return Err(ShellError::labeled_error(
return Err(ShellError::maybe_labeled_error(
"Pick requires fields",
"needs parameter",
span,
args.name_span,
));
} else {
return Err(ShellError::string("pick requires fields."));
}
}
let fields: Result<Vec<String>, _> = args.positional.iter().map(|a| a.as_string()).collect();

8
src/commands/reject.rs
View file

@ -5,15 +5,11 @@ use crate::prelude::*;
pub fn reject(args: CommandArgs) -> Result<OutputStream, ShellError> {
if args.positional.len() == 0 {
if let Some(span) = args.name_span {
return Err(ShellError::labeled_error(
return Err(ShellError::maybe_labeled_error(
"Reject requires fields",
"needs parameter",
span,
args.name_span,
));
} else {
return Err(ShellError::string("reject requires fields."));
}
}
let fields: Result<Vec<String>, _> = args.positional.iter().map(|a| a.as_string()).collect();

6
src/commands/save.rs
View file

@ -6,7 +6,11 @@ use std::path::{Path, PathBuf};
pub fn save(args: SinkCommandArgs) -> Result<(), ShellError> {
if args.positional.len() == 0 {
return Err(ShellError::string("save requires a filepath"));
return Err(ShellError::maybe_labeled_error(
"Save requires a filepath",
"needs path",
args.name_span,
));
}
let cwd = args

8
src/commands/size.rs
View file

@ -6,8 +6,12 @@ use std::fs::File;
use std::io::prelude::*;
pub fn size(args: CommandArgs) -> Result<OutputStream, ShellError> {
if args.positional.is_empty() {
return Err(ShellError::string("size requires at least one file"));
if args.positional.len() == 0 {
return Err(ShellError::maybe_labeled_error(
"Size requires a filepath",
"needs path",
args.name_span,
));
}
let cwd = args
.env

8
src/commands/skip.rs
View file

@ -3,15 +3,11 @@ use crate::prelude::*;
pub fn skip(args: CommandArgs) -> Result<OutputStream, ShellError> {
if args.positional.len() == 0 {
if let Some(span) = args.name_span {
return Err(ShellError::labeled_error(
return Err(ShellError::maybe_labeled_error(
"Skip requires an amount",
"needs parameter",
span,
args.name_span,
));
} else {
return Err(ShellError::string("skip requires an amount."));
}
}
let amount = args.positional[0].as_i64();

8
src/commands/view.rs
View file

@ -4,15 +4,11 @@ use prettyprint::PrettyPrinter;
pub fn view(args: CommandArgs) -> Result<OutputStream, ShellError> {
if args.positional.len() == 0 {
if let Some(span) = args.name_span {
return Err(ShellError::labeled_error(
return Err(ShellError::maybe_labeled_error(
"View requires a filename",
"needs parameter",
span,
args.name_span,
));
} else {
return Err(ShellError::string("view requires a filename."));
}
}
let target = match args.positional[0].as_string() {

8
src/commands/where_.rs
View file

@ -25,8 +25,12 @@ impl Command for Where {
}
pub fn r#where(args: CommandArgs) -> Result<OutputStream, ShellError> {
if args.positional.is_empty() {
return Err(ShellError::string("select requires a field"));
if args.positional.len() == 0 {
return Err(ShellError::maybe_labeled_error(
"Where requires a condition",
"needs condition",
args.name_span,
));
}
let block = args.positional[0].as_block()?;

14
src/errors.rs
View file

@ -53,6 +53,20 @@ impl ShellError {
)
}
crate fn maybe_labeled_error(
msg: impl Into<String>,
label: impl Into<String>,
span: Option<Span>,
) -> ShellError {
match span {
Some(span) => ShellError::diagnostic(
Diagnostic::new(Severity::Error, msg.into())
.with_label(Label::new_primary(span).with_message(label.into())),
),
None => ShellError::string(msg),
}
}
crate fn string(title: impl Into<String>) -> ShellError {
ShellError::String(StringError::new(title.into(), Value::nothing()))
}