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Improved labeled error from plugins (#437)

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* improved labeled error from plugins

* corrected span
This commit is contained in:
Fernando Herrera 2021-12-05 03:11:19 +00:00 committed by GitHub
parent 03e22b071a
commit 22469a9cb1
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
24 changed files with 611 additions and 208 deletions
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2
crates/nu-command/src/core_commands/hide.rs
View File

@ -38,7 +38,7 @@ impl Command for Hide {
{
pat
} else {
return Err(ShellError::LabeledError(
return Err(ShellError::SpannedLabeledError(
"Unexpected import".into(),
"import pattern not supported".into(),
call.head,

2
crates/nu-command/src/core_commands/use_.rs
View File

@ -35,7 +35,7 @@ impl Command for Use {
{
pat
} else {
return Err(ShellError::LabeledError(
return Err(ShellError::SpannedLabeledError(
"Unexpected import".into(),
"import pattern not supported".into(),
call.head,

10
crates/nu-command/src/filesystem/cp.rs
View File

@ -83,32 +83,32 @@ impl Command for Cp {
let prompt = format!(
"Are you shure that you want to copy {} to {}?",
file.as_ref()
.map_err(|err| ShellError::LabeledError(
.map_err(|err| ShellError::SpannedLabeledError(
"Reference error".into(),
err.to_string(),
call.head
))?
.file_name()
.ok_or_else(|| ShellError::LabeledError(
.ok_or_else(|| ShellError::SpannedLabeledError(
"File name error".into(),
"Unable to get file name".into(),
call.head
))?
.to_str()
.ok_or_else(|| ShellError::LabeledError(
.ok_or_else(|| ShellError::SpannedLabeledError(
"Unable to get str error".into(),
"Unable to convert to str file name".into(),
call.head
))?,
destination
.file_name()
.ok_or_else(|| ShellError::LabeledError(
.ok_or_else(|| ShellError::SpannedLabeledError(
"File name error".into(),
"Unable to get file name".into(),
call.head
))?
.to_str()
.ok_or_else(|| ShellError::LabeledError(
.ok_or_else(|| ShellError::SpannedLabeledError(
"Unable to get str error".into(),
"Unable to convert to str file name".into(),
call.head

2
crates/nu-command/src/filesystem/ls.rs
View File

@ -56,7 +56,7 @@ impl Command for Ls {
let call_span = call.head;
let glob = glob::glob(&pattern).map_err(|err| {
nu_protocol::ShellError::LabeledError(
nu_protocol::ShellError::SpannedLabeledError(
"Error extracting glob pattern".into(),
err.to_string(),
call.head,

10
crates/nu-command/src/filesystem/mv.rs
View File

@ -67,32 +67,32 @@ impl Command for Mv {
let prompt = format!(
"Are you shure that you want to move {} to {}?",
file.as_ref()
.map_err(|err| ShellError::LabeledError(
.map_err(|err| ShellError::SpannedLabeledError(
"Reference error".into(),
err.to_string(),
call.head
))?
.file_name()
.ok_or_else(|| ShellError::LabeledError(
.ok_or_else(|| ShellError::SpannedLabeledError(
"File name error".into(),
"Unable to get file name".into(),
call.head
))?
.to_str()
.ok_or_else(|| ShellError::LabeledError(
.ok_or_else(|| ShellError::SpannedLabeledError(
"Unable to get str error".into(),
"Unable to convert to str file name".into(),
call.head
))?,
destination
.file_name()
.ok_or_else(|| ShellError::LabeledError(
.ok_or_else(|| ShellError::SpannedLabeledError(
"File name error".into(),
"Unable to get file name".into(),
call.head
))?
.to_str()
.ok_or_else(|| ShellError::LabeledError(
.ok_or_else(|| ShellError::SpannedLabeledError(
"Unable to get str error".into(),
"Unable to convert to str file name".into(),
call.head

6
crates/nu-command/src/filesystem/rm.rs
View File

@ -126,13 +126,13 @@ fn rm(
"Are you sure that you what to delete {}?",
file.1
.file_name()
.ok_or_else(|| ShellError::LabeledError(
.ok_or_else(|| ShellError::SpannedLabeledError(
"File name error".into(),
"Unable to get file name".into(),
call.head
))?
.to_str()
.ok_or_else(|| ShellError::LabeledError(
.ok_or_else(|| ShellError::SpannedLabeledError(
"Unable to get str error".into(),
"Unable to convert to str file name".into(),
call.head
@ -188,7 +188,7 @@ fn rm_helper(call: &Call, args: RmArgs) -> Vec<Value> {
{
if trash {
let error = match call.get_flag_expr("trash").ok_or_else(|| {
ShellError::LabeledError(
ShellError::SpannedLabeledError(
"Flag not found".into(),
"trash flag not found".into(),
call.head,

2
crates/nu-command/src/filters/first.rs
View File

@ -75,7 +75,7 @@ fn first_helper(
match input_peek
.peek()
.ok_or_else(|| {
ShellError::LabeledError(
ShellError::SpannedLabeledError(
"Error in first".into(),
"unable to pick on next value".into(),
call.head,

4
crates/nu-command/src/platform/kill.rs
View File

@ -87,7 +87,7 @@ impl Command for Kill {
left_span: call
.get_named_arg("force")
.ok_or_else(|| {
ShellError::LabeledError(
ShellError::SpannedLabeledError(
"Flag error".into(),
"flag force not found".into(),
call.head,
@ -98,7 +98,7 @@ impl Command for Kill {
right_span: span(&[
call.get_named_arg("signal")
.ok_or_else(|| {
ShellError::LabeledError(
ShellError::SpannedLabeledError(
"Flag error".into(),
"flag signal not found".into(),
call.head,

6
crates/nu-command/src/viewers/icons.rs
View File

@ -140,7 +140,7 @@ pub fn icon_for_file(file_path: &Path) -> Result<char, ShellError> {
let str = file_path
.file_name()
.ok_or_else(|| {
ShellError::LabeledError(
ShellError::SpannedLabeledError(
"File name error".into(),
"Unable to get file name".into(),
Span::unknown(),
@ -148,7 +148,7 @@ pub fn icon_for_file(file_path: &Path) -> Result<char, ShellError> {
})?
.to_str()
.ok_or_else(|| {
ShellError::LabeledError(
ShellError::SpannedLabeledError(
"Unable to get str error".into(),
"Unable to convert to str file name".into(),
Span::unknown(),
@ -164,7 +164,7 @@ pub fn icon_for_file(file_path: &Path) -> Result<char, ShellError> {
Ok(icon)
} else if let Some(ext) = file_path.extension().as_ref() {
let str = ext.to_str().ok_or_else(|| {
ShellError::LabeledError(
ShellError::SpannedLabeledError(
"Unable to get str error".into(),
"Unable to convert to str file name".into(),
Span::unknown(),

15
crates/nu-plugin/schema/plugin.capnp
View File

@ -57,7 +57,8 @@ struct Signature {
extraUsage @2 :Text;
requiredPositional @3 :List(Argument);
optionalPositional @4 :List(Argument);
rest @5 :Argument; # Optional value. Check for existence when deserializing
# Optional value. Check for existence when deserializing
rest @5 :Argument;
named @6 :List(Flag);
isFilter @7 :Bool;
category @8 :Category;
@ -81,7 +82,8 @@ enum Category {
struct Flag {
long @0 :Text;
short @1 :Text; # Optional value. Check for existence when deserializing
# Optional value. Check for existence when deserializing (has_short)
short @1 :Text;
arg @2 :Shape;
required @3 :Bool;
desc @4 :Text;
@ -128,8 +130,15 @@ struct PluginCall {
struct PluginResponse {
union {
error @0 :Text;
error @0 :LabeledError;
signature @1 :List(Signature);
value @2 :Value;
}
}
struct LabeledError {
label @0 :Text;
msg @1 :Text;
# Optional Value. When decoding check if it exists (has_span)
span @2 :Span;
}

4
crates/nu-plugin/src/evaluated_call.rs
View File

@ -5,6 +5,10 @@ use nu_protocol::{
FromValue, ShellError, Span, Spanned, Value,
};
// The evaluated call is used with the Plugins because the plugin doesn't have
// access to the Stack and the EngineState. For that reason, before encoding the
// message to the plugin all the arguments to the original call (which are expressions)
// are evaluated and passed to Values
#[derive(Debug, Clone)]
pub struct EvaluatedCall {
pub head: Span,

3
crates/nu-plugin/src/lib.rs
View File

@ -1,8 +1,7 @@
pub mod evaluated_call;
pub mod plugin;
pub mod plugin_call;
pub mod plugin_capnp;
pub mod serializers;
pub use evaluated_call::EvaluatedCall;
pub use plugin::{serve_plugin, Plugin};
pub use plugin::{serve_plugin, LabeledError, Plugin};

133
crates/nu-plugin/src/plugin.rs
View File

@ -1,11 +1,11 @@
use crate::plugin_call::{self, decode_call, encode_response};
use crate::serializers::{decode_call, decode_response, encode_call, encode_response};
use std::io::BufReader;
use std::path::{Path, PathBuf};
use std::process::{Command as CommandSys, Stdio};
use nu_protocol::engine::{Command, EngineState, Stack};
use nu_protocol::{ast::Call, Signature, Value};
use nu_protocol::{PipelineData, ShellError};
use nu_protocol::{PipelineData, ShellError, Span};
use super::evaluated_call::EvaluatedCall;
@ -25,10 +25,73 @@ pub enum PluginCall {
CallInfo(Box<CallInfo>),
}
#[derive(Clone, Debug, PartialEq)]
pub struct LabeledError {
pub label: String,
pub msg: String,
pub span: Option<Span>,
}
impl From<LabeledError> for ShellError {
fn from(error: LabeledError) -> Self {
match error.span {
Some(span) => ShellError::SpannedLabeledError(error.label, error.msg, span),
None => ShellError::LabeledError(error.label, error.msg),
}
}
}
impl From<ShellError> for LabeledError {
fn from(error: ShellError) -> Self {
match error {
ShellError::SpannedLabeledError(label, msg, span) => LabeledError {
label,
msg,
span: Some(span),
},
ShellError::LabeledError(label, msg) => LabeledError {
label,
msg,
span: None,
},
ShellError::CantConvert(expected, input, span) => LabeledError {
label: format!("Can't convert to {}", expected),
msg: format!("can't convert {} to {}", expected, input),
span: Some(span),
},
ShellError::DidYouMean(suggestion, span) => LabeledError {
label: "Name not found".into(),
msg: format!("did you mean '{}'", suggestion),
span: Some(span),
},
ShellError::PluginFailedToLoad(msg) => LabeledError {
label: "Plugin failed to load".into(),
msg,
span: None,
},
ShellError::PluginFailedToEncode(msg) => LabeledError {
label: "Plugin failed to encode".into(),
msg,
span: None,
},
ShellError::PluginFailedToDecode(msg) => LabeledError {
label: "Plugin failed to decode".into(),
msg,
span: None,
},
err => LabeledError {
label: "Error - Add to LabeledError From<ShellError>".into(),
msg: err.to_string(),
span: None,
},
}
}
}
// Information received from the plugin
#[derive(Debug)]
pub enum PluginResponse {
Error(String),
Error(LabeledError),
Signature(Vec<Signature>),
Value(Box<Value>),
}
@ -44,21 +107,18 @@ pub fn get_signature(path: &Path) -> Result<Vec<Signature>, ShellError> {
// send call to plugin asking for signature
if let Some(stdin_writer) = &mut child.stdin {
let mut writer = stdin_writer;
plugin_call::encode_call(&PluginCall::Signature, &mut writer)?
encode_call(&PluginCall::Signature, &mut writer)?
}
// deserialize response from plugin to extract the signature
let signature = if let Some(stdout_reader) = &mut child.stdout {
let reader = stdout_reader;
let mut buf_read = BufReader::with_capacity(OUTPUT_BUFFER_SIZE, reader);
let response = plugin_call::decode_response(&mut buf_read)?;
let response = decode_response(&mut buf_read)?;
match response {
PluginResponse::Signature(sign) => Ok(sign),
PluginResponse::Error(msg) => Err(ShellError::PluginFailedToLoad(format!(
"Plugin response error {}",
msg,
))),
PluginResponse::Error(err) => Err(err.into()),
_ => Err(ShellError::PluginFailedToLoad(
"Plugin missing signature".into(),
)),
@ -139,7 +199,7 @@ impl Command for PluginDeclaration {
let mut child = plugin_cmd.spawn().map_err(|err| {
let decl = engine_state.get_decl(call.decl_id);
ShellError::LabeledError(
ShellError::SpannedLabeledError(
format!("Unable to spawn plugin for {}", decl.name()),
format!("{}", err),
call.head,
@ -170,9 +230,9 @@ impl Command for PluginDeclaration {
let mut writer = stdin_writer;
plugin_call::encode_call(&plugin_call, &mut writer).map_err(|err| {
encode_call(&plugin_call, &mut writer).map_err(|err| {
let decl = engine_state.get_decl(call.decl_id);
ShellError::LabeledError(
ShellError::SpannedLabeledError(
format!("Unable to encode call for {}", decl.name()),
err.to_string(),
call.head,
@ -184,9 +244,9 @@ impl Command for PluginDeclaration {
let pipeline_data = if let Some(stdout_reader) = &mut child.stdout {
let reader = stdout_reader;
let mut buf_read = BufReader::with_capacity(OUTPUT_BUFFER_SIZE, reader);
let response = plugin_call::decode_response(&mut buf_read).map_err(|err| {
let response = decode_response(&mut buf_read).map_err(|err| {
let decl = engine_state.get_decl(call.decl_id);
ShellError::LabeledError(
ShellError::SpannedLabeledError(
format!("Unable to decode call for {}", decl.name()),
err.to_string(),
call.head,
@ -197,19 +257,15 @@ impl Command for PluginDeclaration {
PluginResponse::Value(value) => {
Ok(PipelineData::Value(value.as_ref().clone(), None))
}
PluginResponse::Error(msg) => Err(ShellError::LabeledError(
"Error received from plugin".into(),
msg,
call.head,
)),
_ => Err(ShellError::LabeledError(
PluginResponse::Error(err) => Err(err.into()),
PluginResponse::Signature(..) => Err(ShellError::SpannedLabeledError(
"Plugin missing value".into(),
"No value received from plugin".into(),
"Received a signature from plugin instead of value".into(),
call.head,
)),
}
} else {
Err(ShellError::LabeledError(
Err(ShellError::SpannedLabeledError(
"Error with stdout reader".into(),
"no stdout reader".into(),
call.head,
@ -226,24 +282,43 @@ impl Command for PluginDeclaration {
}
}
/// The `Plugin` trait defines the API which plugins use to "hook" into nushell.
// The next trait and functions are part of the plugin that is being created
// The `Plugin` trait defines the API which plugins use to "hook" into nushell.
pub trait Plugin {
fn signature(&self) -> Vec<Signature>;
fn run(&mut self, name: &str, call: &EvaluatedCall, input: &Value)
-> Result<Value, ShellError>;
fn run(
&mut self,
name: &str,
call: &EvaluatedCall,
input: &Value,
) -> Result<Value, LabeledError>;
}
// Function used in the plugin definition for the communication protocol between
// nushell and the external plugin.
// If you want to create a new plugin you have to use this function as the main
// entry point for the plugin
// When creating a new plugin you have to use this function as the main
// entry point for the plugin, e.g.
//
// fn main() {
// serve_plugin(plugin)
// }
//
// where plugin is your struct that implements the Plugin trait
//
// Note. When defining a plugin in other language but Rust, you will have to compile
// the plugin.capnp schema to create the object definitions that will be returned from
// the plugin.
// The object that is expected to be received by nushell is the PluginResponse struct.
// That should be encoded correctly and sent to StdOut for nushell to decode and
// and present its result
//
pub fn serve_plugin(plugin: &mut impl Plugin) {
let mut stdin_buf = BufReader::with_capacity(OUTPUT_BUFFER_SIZE, std::io::stdin());
let plugin_call = decode_call(&mut stdin_buf);
match plugin_call {
Err(err) => {
let response = PluginResponse::Error(err.to_string());
let response = PluginResponse::Error(err.into());
encode_response(&response, &mut std::io::stdout()).expect("Error encoding response");
}
Ok(plugin_call) => {
@ -259,7 +334,7 @@ pub fn serve_plugin(plugin: &mut impl Plugin) {
let response = match value {
Ok(value) => PluginResponse::Value(Box::new(value)),
Err(err) => PluginResponse::Error(err.to_string()),
Err(err) => PluginResponse::Error(err),
};
encode_response(&response, &mut std::io::stdout())
.expect("Error encoding response");

272
crates/nu-plugin/src/plugin_capnp.rs
View File

@ -3812,14 +3812,21 @@ pub mod plugin_response {
self.builder.into_reader().total_size()
}
#[inline]
pub fn set_error(&mut self, value: ::capnp::text::Reader<'_>) {
pub fn set_error(
&mut self,
value: crate::plugin_capnp::labeled_error::Reader<'_>,
) -> ::capnp::Result<()> {
self.builder.set_data_field::<u16>(0, 0);
self.builder.get_pointer_field(0).set_text(value);
::capnp::traits::SetPointerBuilder::set_pointer_builder(
self.builder.get_pointer_field(0),
value,
false,
)
}
#[inline]
pub fn init_error(self, size: u32) -> ::capnp::text::Builder<'a> {
pub fn init_error(self) -> crate::plugin_capnp::labeled_error::Builder<'a> {
self.builder.set_data_field::<u16>(0, 0);
self.builder.get_pointer_field(0).init_text(size)
::capnp::traits::FromPointerBuilder::init_pointer(self.builder.get_pointer_field(0), 0)
}
pub fn has_error(&self) -> bool {
if self.builder.get_data_field::<u16>(0) != 0 {
@ -3930,13 +3937,266 @@ pub mod plugin_response {
Value(A2),
}
pub type WhichReader<'a> = Which<
::capnp::Result<::capnp::text::Reader<'a>>,
::capnp::Result<crate::plugin_capnp::labeled_error::Reader<'a>>,
::capnp::Result<::capnp::struct_list::Reader<'a, crate::plugin_capnp::signature::Owned>>,
::capnp::Result<crate::plugin_capnp::value::Reader<'a>>,
>;
pub type WhichBuilder<'a> = Which<
::capnp::Result<::capnp::text::Builder<'a>>,
::capnp::Result<crate::plugin_capnp::labeled_error::Builder<'a>>,
::capnp::Result<::capnp::struct_list::Builder<'a, crate::plugin_capnp::signature::Owned>>,
::capnp::Result<crate::plugin_capnp::value::Builder<'a>>,
>;
}
pub mod labeled_error {
#[derive(Copy, Clone)]
pub struct Owned(());
impl<'a> ::capnp::traits::Owned<'a> for Owned {
type Reader = Reader<'a>;
type Builder = Builder<'a>;
}
impl<'a> ::capnp::traits::OwnedStruct<'a> for Owned {
type Reader = Reader<'a>;
type Builder = Builder<'a>;
}
impl ::capnp::traits::Pipelined for Owned {
type Pipeline = Pipeline;
}
#[derive(Clone, Copy)]
pub struct Reader<'a> {
reader: ::capnp::private::layout::StructReader<'a>,
}
impl<'a> ::capnp::traits::HasTypeId for Reader<'a> {
#[inline]
fn type_id() -> u64 {
_private::TYPE_ID
}
}
impl<'a> ::capnp::traits::FromStructReader<'a> for Reader<'a> {
fn new(reader: ::capnp::private::layout::StructReader<'a>) -> Reader<'a> {
Reader { reader }
}
}
impl<'a> ::capnp::traits::FromPointerReader<'a> for Reader<'a> {
fn get_from_pointer(
reader: &::capnp::private::layout::PointerReader<'a>,
default: ::core::option::Option<&'a [capnp::Word]>,
) -> ::capnp::Result<Reader<'a>> {
::core::result::Result::Ok(::capnp::traits::FromStructReader::new(
reader.get_struct(default)?,
))
}
}
impl<'a> ::capnp::traits::IntoInternalStructReader<'a> for Reader<'a> {
fn into_internal_struct_reader(self) -> ::capnp::private::layout::StructReader<'a> {
self.reader
}
}
impl<'a> ::capnp::traits::Imbue<'a> for Reader<'a> {
fn imbue(&mut self, cap_table: &'a ::capnp::private::layout::CapTable) {
self.reader
.imbue(::capnp::private::layout::CapTableReader::Plain(cap_table))
}
}
impl<'a> Reader<'a> {
pub fn reborrow(&self) -> Reader<'_> {
Reader { ..*self }
}
pub fn total_size(&self) -> ::capnp::Result<::capnp::MessageSize> {
self.reader.total_size()
}
#[inline]
pub fn get_label(self) -> ::capnp::Result<::capnp::text::Reader<'a>> {
::capnp::traits::FromPointerReader::get_from_pointer(
&self.reader.get_pointer_field(0),
::core::option::Option::None,
)
}
pub fn has_label(&self) -> bool {
!self.reader.get_pointer_field(0).is_null()
}
#[inline]
pub fn get_msg(self) -> ::capnp::Result<::capnp::text::Reader<'a>> {
::capnp::traits::FromPointerReader::get_from_pointer(
&self.reader.get_pointer_field(1),
::core::option::Option::None,
)
}
pub fn has_msg(&self) -> bool {
!self.reader.get_pointer_field(1).is_null()
}
#[inline]
pub fn get_span(self) -> ::capnp::Result<crate::plugin_capnp::span::Reader<'a>> {
::capnp::traits::FromPointerReader::get_from_pointer(
&self.reader.get_pointer_field(2),
::core::option::Option::None,
)
}
pub fn has_span(&self) -> bool {
!self.reader.get_pointer_field(2).is_null()
}
}
pub struct Builder<'a> {
builder: ::capnp::private::layout::StructBuilder<'a>,
}
impl<'a> ::capnp::traits::HasStructSize for Builder<'a> {
#[inline]
fn struct_size() -> ::capnp::private::layout::StructSize {
_private::STRUCT_SIZE
}
}
impl<'a> ::capnp::traits::HasTypeId for Builder<'a> {
#[inline]
fn type_id() -> u64 {
_private::TYPE_ID
}
}
impl<'a> ::capnp::traits::FromStructBuilder<'a> for Builder<'a> {
fn new(builder: ::capnp::private::layout::StructBuilder<'a>) -> Builder<'a> {
Builder { builder }
}
}
impl<'a> ::capnp::traits::ImbueMut<'a> for Builder<'a> {
fn imbue_mut(&mut self, cap_table: &'a mut ::capnp::private::layout::CapTable) {
self.builder
.imbue(::capnp::private::layout::CapTableBuilder::Plain(cap_table))
}
}
impl<'a> ::capnp::traits::FromPointerBuilder<'a> for Builder<'a> {
fn init_pointer(
builder: ::capnp::private::layout::PointerBuilder<'a>,
_size: u32,
) -> Builder<'a> {
::capnp::traits::FromStructBuilder::new(builder.init_struct(_private::STRUCT_SIZE))
}
fn get_from_pointer(
builder: ::capnp::private::layout::PointerBuilder<'a>,
default: ::core::option::Option<&'a [capnp::Word]>,
) -> ::capnp::Result<Builder<'a>> {
::core::result::Result::Ok(::capnp::traits::FromStructBuilder::new(
builder.get_struct(_private::STRUCT_SIZE, default)?,
))
}
}
impl<'a> ::capnp::traits::SetPointerBuilder for Reader<'a> {
fn set_pointer_builder<'b>(
pointer: ::capnp::private::layout::PointerBuilder<'b>,
value: Reader<'a>,
canonicalize: bool,
) -> ::capnp::Result<()> {
pointer.set_struct(&value.reader, canonicalize)
}
}
impl<'a> Builder<'a> {
pub fn into_reader(self) -> Reader<'a> {
::capnp::traits::FromStructReader::new(self.builder.into_reader())
}
pub fn reborrow(&mut self) -> Builder<'_> {
Builder { ..*self }
}
pub fn reborrow_as_reader(&self) -> Reader<'_> {
::capnp::traits::FromStructReader::new(self.builder.into_reader())
}
pub fn total_size(&self) -> ::capnp::Result<::capnp::MessageSize> {
self.builder.into_reader().total_size()
}
#[inline]
pub fn get_label(self) -> ::capnp::Result<::capnp::text::Builder<'a>> {
::capnp::traits::FromPointerBuilder::get_from_pointer(
self.builder.get_pointer_field(0),
::core::option::Option::None,
)
}
#[inline]
pub fn set_label(&mut self, value: ::capnp::text::Reader<'_>) {
self.builder.get_pointer_field(0).set_text(value);
}
#[inline]
pub fn init_label(self, size: u32) -> ::capnp::text::Builder<'a> {
self.builder.get_pointer_field(0).init_text(size)
}
pub fn has_label(&self) -> bool {
!self.builder.get_pointer_field(0).is_null()
}
#[inline]
pub fn get_msg(self) -> ::capnp::Result<::capnp::text::Builder<'a>> {
::capnp::traits::FromPointerBuilder::get_from_pointer(
self.builder.get_pointer_field(1),
::core::option::Option::None,
)
}
#[inline]
pub fn set_msg(&mut self, value: ::capnp::text::Reader<'_>) {
self.builder.get_pointer_field(1).set_text(value);
}
#[inline]
pub fn init_msg(self, size: u32) -> ::capnp::text::Builder<'a> {
self.builder.get_pointer_field(1).init_text(size)
}
pub fn has_msg(&self) -> bool {
!self.builder.get_pointer_field(1).is_null()
}
#[inline]
pub fn get_span(self) -> ::capnp::Result<crate::plugin_capnp::span::Builder<'a>> {
::capnp::traits::FromPointerBuilder::get_from_pointer(
self.builder.get_pointer_field(2),
::core::option::Option::None,
)
}
#[inline]
pub fn set_span(
&mut self,
value: crate::plugin_capnp::span::Reader<'_>,
) -> ::capnp::Result<()> {
::capnp::traits::SetPointerBuilder::set_pointer_builder(
self.builder.get_pointer_field(2),
value,
false,
)
}
#[inline]
pub fn init_span(self) -> crate::plugin_capnp::span::Builder<'a> {
::capnp::traits::FromPointerBuilder::init_pointer(self.builder.get_pointer_field(2), 0)
}
pub fn has_span(&self) -> bool {
!self.builder.get_pointer_field(2).is_null()
}
}
pub struct Pipeline {
_typeless: ::capnp::any_pointer::Pipeline,
}
impl ::capnp::capability::FromTypelessPipeline for Pipeline {
fn new(typeless: ::capnp::any_pointer::Pipeline) -> Pipeline {
Pipeline {
_typeless: typeless,
}
}
}
impl Pipeline {
pub fn get_span(&self) -> crate::plugin_capnp::span::Pipeline {
::capnp::capability::FromTypelessPipeline::new(self._typeless.get_pointer_field(2))
}
}
mod _private {
use capnp::private::layout;
pub const STRUCT_SIZE: layout::StructSize = layout::StructSize {
data: 0,
pointers: 3,
};
pub const TYPE_ID: u64 = 0x94d1_6904_99e7_04fe;
}
}

16
crates/nu-plugin/src/serializers/call.rs
View File

@ -38,7 +38,7 @@ fn serialize_named(
entry_builder
.reborrow()
.set_key(key.item.as_str())
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToEncode(e.to_string()))?;
if let Some(value) = expression {
let value_builder = entry_builder.init_value();
@ -54,7 +54,7 @@ pub(crate) fn deserialize_call(
) -> Result<EvaluatedCall, ShellError> {
let head_reader = reader
.get_head()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let head = Span {
start: head_reader.get_start() as usize,
@ -77,7 +77,7 @@ fn deserialize_positionals(
) -> Result<Vec<Value>, ShellError> {
let positional_reader = reader
.get_positional()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
positional_reader
.iter()
@ -90,11 +90,11 @@ type NamedList = Vec<(Spanned<String>, Option<Value>)>;
fn deserialize_named(span: Span, reader: evaluated_call::Reader) -> Result<NamedList, ShellError> {
let named_reader = reader
.get_named()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let entries_list = named_reader
.get_entries()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let mut entries: Vec<(Spanned<String>, Option<Value>)> =
Vec::with_capacity(entries_list.len() as usize);
@ -102,16 +102,16 @@ fn deserialize_named(span: Span, reader: evaluated_call::Reader) -> Result<Named
for entry_reader in entries_list {
let item = entry_reader
.get_key()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?
.to_string();
let value = if entry_reader.has_value() {
let value_reader = entry_reader
.get_value()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let value = value::deserialize_value(value_reader)
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
Some(value)
} else {

9
crates/nu-plugin/src/serializers/mod.rs
View File

@ -1,3 +1,6 @@
pub mod call;
pub mod signature;
pub mod value;
mod call;
mod plugin_call;
mod signature;
mod value;
pub use plugin_call::*;

101
crates/nu-plugin/src/plugin_call.rs → crates/nu-plugin/src/serializers/plugin_call.rs
View File

@ -1,9 +1,9 @@
use crate::plugin::{CallInfo, PluginCall, PluginResponse};
use crate::plugin::{CallInfo, LabeledError, PluginCall, PluginResponse};
use crate::plugin_capnp::{plugin_call, plugin_response};
use crate::serializers::signature::deserialize_signature;
use crate::serializers::{call, signature, value};
use capnp::serialize;
use nu_protocol::{ShellError, Signature};
use nu_protocol::{ShellError, Signature, Span};
pub fn encode_call(
plugin_call: &PluginCall,
@ -25,54 +25,54 @@ pub fn encode_call(
let call_builder = call_info_builder
.reborrow()
.get_call()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToEncode(e.to_string()))?;
call::serialize_call(&call_info.call, call_builder)
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToEncode(e.to_string()))?;
// Serializing the input value from the call info
let value_builder = call_info_builder
.reborrow()
.get_input()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToEncode(e.to_string()))?;
value::serialize_value(&call_info.input, value_builder);
}
};
serialize::write_message(writer, &message)
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))
.map_err(|e| ShellError::PluginFailedToEncode(e.to_string()))
}
pub fn decode_call(reader: &mut impl std::io::BufRead) -> Result<PluginCall, ShellError> {
let message_reader = serialize::read_message(reader, ::capnp::message::ReaderOptions::new())
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let reader = message_reader
.get_root::<plugin_call::Reader>()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
match reader.which() {
Err(capnp::NotInSchema(_)) => {
Err(ShellError::PluginFailedToLoad("value not in schema".into()))
}
Err(capnp::NotInSchema(_)) => Err(ShellError::PluginFailedToDecode(
"value not in schema".into(),
)),
Ok(plugin_call::Signature(())) => Ok(PluginCall::Signature),
Ok(plugin_call::CallInfo(reader)) => {
let reader = reader.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
let reader = reader.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let name = reader
.get_name()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let call_reader = reader
.get_call()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let call = call::deserialize_call(call_reader)?;
let input_reader = reader
.get_input()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let input = value::deserialize_value(input_reader)?;
@ -94,7 +94,17 @@ pub fn encode_response(
let mut builder = message.init_root::<plugin_response::Builder>();
match &plugin_response {
PluginResponse::Error(msg) => builder.reborrow().set_error(msg.as_str()),
PluginResponse::Error(msg) => {
let mut error_builder = builder.reborrow().init_error();
error_builder.set_label(&msg.label);
error_builder.set_msg(&msg.msg);
if let Some(span) = msg.span {
let mut span_builder = error_builder.reborrow().init_span();
span_builder.set_start(span.start as u64);
span_builder.set_end(span.end as u64);
}
}
PluginResponse::Signature(signatures) => {
let mut signature_list_builder =
builder.reborrow().init_signature(signatures.len() as u32);
@ -111,28 +121,55 @@ pub fn encode_response(
};
serialize::write_message(writer, &message)
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))
}
pub fn decode_response(reader: &mut impl std::io::BufRead) -> Result<PluginResponse, ShellError> {
let message_reader = serialize::read_message(reader, ::capnp::message::ReaderOptions::new())
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let reader = message_reader
.get_root::<plugin_response::Reader>()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
match reader.which() {
Err(capnp::NotInSchema(_)) => {
Err(ShellError::PluginFailedToLoad("value not in schema".into()))
}
Err(capnp::NotInSchema(_)) => Err(ShellError::PluginFailedToDecode(
"value not in schema".into(),
)),
Ok(plugin_response::Error(reader)) => {
let msg = reader.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
let reader = reader.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
Ok(PluginResponse::Error(msg.to_string()))
let msg = reader
.get_msg()
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let label = reader
.get_label()
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let span = if reader.has_span() {
let span = reader
.get_span()
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
Some(Span {
start: span.get_start() as usize,
end: span.get_end() as usize,
})
} else {
None
};
let error = LabeledError {
label: label.into(),
msg: msg.into(),
span,
};
Ok(PluginResponse::Error(error))
}
Ok(plugin_response::Signature(reader)) => {
let reader = reader.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
let reader = reader.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let signatures = reader
.iter()
@ -142,9 +179,9 @@ pub fn decode_response(reader: &mut impl std::io::BufRead) -> Result<PluginRespo
Ok(PluginResponse::Signature(signatures))
}
Ok(plugin_response::Value(reader)) => {
let reader = reader.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
let reader = reader.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let val = value::deserialize_value(reader)
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
Ok(PluginResponse::Value(Box::new(val)))
}
@ -327,8 +364,12 @@ mod tests {
#[test]
fn response_round_trip_error() {
let message = "some error".to_string();
let response = PluginResponse::Error(message.clone());
let error = LabeledError {
label: "label".into(),
msg: "msg".into(),
span: Some(Span { start: 2, end: 30 }),
};
let response = PluginResponse::Error(error.clone());
let mut buffer: Vec<u8> = Vec::new();
encode_response(&response, &mut buffer).expect("unable to serialize message");
@ -336,7 +377,7 @@ mod tests {
decode_response(&mut buffer.as_slice()).expect("unable to deserialize message");
match returned {
PluginResponse::Error(msg) => assert_eq!(message, msg),
PluginResponse::Error(msg) => assert_eq!(error, msg),
PluginResponse::Signature(_) => panic!("returned wrong call type"),
PluginResponse::Value(_) => panic!("returned wrong call type"),
}

34
crates/nu-plugin/src/serializers/signature.rs
View File

@ -96,18 +96,18 @@ fn serialize_flag(arg: &Flag, mut builder: flag::Builder) {
pub(crate) fn deserialize_signature(reader: signature::Reader) -> Result<Signature, ShellError> {
let name = reader
.get_name()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let usage = reader
.get_usage()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let extra_usage = reader
.get_extra_usage()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let is_filter = reader.get_is_filter();
let category = match reader
.get_category()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?
{
PluginCategory::Default => Category::Default,
PluginCategory::Conversions => Category::Conversions,
@ -127,7 +127,7 @@ pub(crate) fn deserialize_signature(reader: signature::Reader) -> Result<Signatu
// Deserializing required arguments
let required_list = reader
.get_required_positional()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let required_positional = required_list
.iter()
@ -137,7 +137,7 @@ pub(crate) fn deserialize_signature(reader: signature::Reader) -> Result<Signatu
// Deserializing optional arguments
let optional_list = reader
.get_optional_positional()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let optional_positional = optional_list
.iter()
@ -148,7 +148,7 @@ pub(crate) fn deserialize_signature(reader: signature::Reader) -> Result<Signatu
let rest_positional = if reader.has_rest() {
let argument_reader = reader
.get_rest()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
Some(deserialize_argument(argument_reader)?)
} else {
@ -158,7 +158,7 @@ pub(crate) fn deserialize_signature(reader: signature::Reader) -> Result<Signatu
// Deserializing named arguments
let named_list = reader
.get_named()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let named = named_list
.iter()
@ -182,15 +182,15 @@ pub(crate) fn deserialize_signature(reader: signature::Reader) -> Result<Signatu
fn deserialize_argument(reader: argument::Reader) -> Result<PositionalArg, ShellError> {
let name = reader
.get_name()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let desc = reader
.get_desc()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let shape = reader
.get_shape()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let shape = match shape {
Shape::String => SyntaxShape::String,
@ -212,18 +212,18 @@ fn deserialize_argument(reader: argument::Reader) -> Result<PositionalArg, Shell
fn deserialize_flag(reader: flag::Reader) -> Result<Flag, ShellError> {
let long = reader
.get_long()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let desc = reader
.get_desc()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let required = reader.get_required();
let short = if reader.has_short() {
let short_reader = reader
.get_short()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
short_reader.chars().next()
} else {
@ -232,7 +232,7 @@ fn deserialize_flag(reader: flag::Reader) -> Result<Flag, ShellError> {
let arg = reader
.get_arg()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let arg = match arg {
Shape::None => None,
@ -270,7 +270,7 @@ mod tests {
serialize_signature(signature, builder);
serialize::write_message(writer, &message)
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))
.map_err(|e| ShellError::PluginFailedToEncode(e.to_string()))
}
pub fn read_buffer(reader: &mut impl std::io::BufRead) -> Result<Signature, ShellError> {
@ -279,7 +279,7 @@ mod tests {
let reader = message_reader
.get_root::<signature::Reader>()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToEncode(e.to_string()))?;
deserialize_signature(reader)
}

18
crates/nu-plugin/src/serializers/value.rs
View File

@ -63,7 +63,7 @@ pub(crate) fn serialize_value(value: &Value, mut builder: value::Builder) {
pub(crate) fn deserialize_value(reader: value::Reader) -> Result<Value, ShellError> {
let span_reader = reader
.get_span()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let span = Span {
start: span_reader.get_start() as usize,
@ -77,26 +77,26 @@ pub(crate) fn deserialize_value(reader: value::Reader) -> Result<Value, ShellErr
Ok(value::Float(val)) => Ok(Value::Float { val, span }),
Ok(value::String(val)) => {
let string = val
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?
.to_string();
Ok(Value::String { val: string, span })
}
Ok(value::Record(record)) => {
let record = record.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
let record = record.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let cols = record
.get_cols()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?
.iter()
.map(|col| {
col.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))
col.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))
.map(|col| col.to_string())
})
.collect::<Result<Vec<String>, ShellError>>()?;
let vals = record
.get_vals()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?
.iter()
.map(deserialize_value)
.collect::<Result<Vec<Value>, ShellError>>()?;
@ -104,7 +104,7 @@ pub(crate) fn deserialize_value(reader: value::Reader) -> Result<Value, ShellErr
Ok(Value::Record { cols, vals, span })
}
Ok(value::List(vals)) => {
let values = vals.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
let values = vals.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
let values_list = values
.iter()
@ -136,7 +136,7 @@ mod tests {
serialize_value(value, builder.reborrow());
serialize::write_message(writer, &message)
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))
}
pub fn read_buffer(reader: &mut impl std::io::BufRead) -> Result<Value, ShellError> {
@ -145,7 +145,7 @@ mod tests {
let reader = message_reader
.get_root::<value::Reader>()
.map_err(|e| ShellError::PluginFailedToLoad(e.to_string()))?;
.map_err(|e| ShellError::PluginFailedToDecode(e.to_string()))?;
deserialize_value(reader.reborrow())
}

28
crates/nu-protocol/src/engine/engine_state.rs
View File

@ -217,11 +217,17 @@ impl EngineState {
use std::io::Write;
// Updating the signatures plugin file with the added signatures
if let Some(plugin_path) = &self.plugin_signatures {
self.plugin_signatures
.as_ref()
.ok_or_else(|| ShellError::PluginFailedToLoad("Plugin file not found".into()))
.and_then(|plugin_path| {
// Always create the file, which will erase previous signatures
if let Ok(mut plugin_file) = std::fs::File::create(plugin_path.as_path()) {
std::fs::File::create(plugin_path.as_path())
.map_err(|err| ShellError::PluginFailedToLoad(err.to_string()))
})
.and_then(|mut plugin_file| {
// Plugin definitions with parsed signature
for decl in self.plugin_decls() {
self.plugin_decls().try_for_each(|decl| {
// A successful plugin registration already includes the plugin filename
// No need to check the None option
let path = decl.is_plugin().expect("plugin should have file name");
@ -234,19 +240,9 @@ impl EngineState {
plugin_file
.write_all(line.as_bytes())
.map_err(|err| ShellError::PluginFailedToLoad(err.to_string()))
})?;
}
Ok(())
} else {
Err(ShellError::PluginFailedToLoad(
"Plugin file not found".into(),
))
}
} else {
Err(ShellError::PluginFailedToLoad(
"Plugin file not found".into(),
))
}
})
})
})
}
pub fn num_files(&self) -> usize {

18
crates/nu-protocol/src/shell_error.rs
View File

@ -170,9 +170,17 @@ pub enum ShellError {
FileNotFoundCustom(String, #[label("{0}")] Span),
#[error("Plugin failed to load")]
#[diagnostic(code(nu::shell::plugin_fialed_to_load), url(docsrs))]
#[diagnostic(code(nu::shell::plugin_failed_to_load), url(docsrs))]
PluginFailedToLoad(String),
#[error("Plugin failed to encode")]
#[diagnostic(code(nu::shell::plugin_failed_to_encode), url(docsrs))]
PluginFailedToEncode(String),
#[error("Plugin failed to decode")]
#[diagnostic(code(nu::shell::plugin_failed_to_decode), url(docsrs))]
PluginFailedToDecode(String),
#[error("I/O error")]
#[diagnostic(code(nu::shell::io_error), url(docsrs))]
IOError(String),
@ -224,12 +232,16 @@ pub enum ShellError {
NonUtf8(#[label = "non-UTF8 string"] Span),
#[error("Casting error")]
#[diagnostic(code(nu::parser::downcast_not_possible), url(docsrs))]
#[diagnostic(code(nu::shell::downcast_not_possible), url(docsrs))]
DowncastNotPossible(String, #[label("{0}")] Span),
#[error("{0}")]
#[diagnostic()]
LabeledError(String, String, #[label("{1}")] Span),
SpannedLabeledError(String, String, #[label("{1}")] Span),
#[error("{0}")]
#[diagnostic()]
LabeledError(String, String),
}
impl From<std::io::Error> for ShellError {

77
crates/nu_plugin_example/src/main.rs
View File

@ -1,5 +1,5 @@
use nu_plugin::{serve_plugin, EvaluatedCall, Plugin};
use nu_protocol::{Category, ShellError, Signature, SyntaxShape, Value};
use nu_plugin::{serve_plugin, EvaluatedCall, LabeledError, Plugin};
use nu_protocol::{Category, Signature, SyntaxShape, Value};
fn main() {
serve_plugin(&mut Example {})
@ -29,7 +29,16 @@ impl Plugin for Example {
.switch("flag", "a flag for the signature", Some('f'))
.optional("opt", SyntaxShape::Int, "Optional number")
.named("named", SyntaxShape::String, "named string", Some('n'))
.rest("rest", SyntaxShape::Int, "rest value int")
.rest("rest", SyntaxShape::String, "rest value string")
.category(Category::Experimental),
Signature::build("test-3")
.desc("Signature test 3 for plugin. Returns labeled error")
.required("a", SyntaxShape::Int, "required integer value")
.required("b", SyntaxShape::String, "required string value")
.switch("flag", "a flag for the signature", Some('f'))
.optional("opt", SyntaxShape::Int, "Optional number")
.named("named", SyntaxShape::String, "named string", Some('n'))
.rest("rest", SyntaxShape::String, "rest value string")
.category(Category::Experimental),
]
}
@ -39,25 +48,26 @@ impl Plugin for Example {
name: &str,
call: &EvaluatedCall,
input: &Value,
) -> Result<Value, ShellError> {
) -> Result<Value, LabeledError> {
// You can use the name to identify what plugin signature was called
match name {
"test-1" => test1(call, input),
"test-2" => test2(call, input),
_ => Err(ShellError::LabeledError(
"Plugin call with wrong name signature".into(),
"using the wrong signature".into(),
call.head,
)),
"test-3" => test3(call, input),
_ => Err(LabeledError {
label: "Plugin call with wrong name signature".into(),
msg: "using the wrong signature".into(),
span: Some(call.head),
}),
}
}
}
fn test1(call: &EvaluatedCall, input: &Value) -> Result<Value, ShellError> {
fn print_values(index: u32, call: &EvaluatedCall, input: &Value) -> Result<(), LabeledError> {
// Note. When debugging your plugin, you may want to print something to the console
// Use the eprintln macro to print your messages. Trying to print to stdout will
// cause a decoding error for your message
eprintln!("Calling test1 signature");
eprintln!("Calling test {} signature", index);
eprintln!("value received {:?}", input);
// To extract the arguments from the Call object you can use the functions req, has_flag,
@ -90,36 +100,17 @@ fn test1(call: &EvaluatedCall, input: &Value) -> Result<Value, ShellError> {
None => eprintln!("No named value found"),
}
Ok(())
}
fn test1(call: &EvaluatedCall, input: &Value) -> Result<Value, LabeledError> {
print_values(1, call, input)?;
Ok(Value::Nothing { span: call.head })
}
fn test2(call: &EvaluatedCall, input: &Value) -> Result<Value, ShellError> {
eprintln!("Calling test1 signature");
eprintln!("value received {:?}", input);
eprintln!("Arguments received");
let a: i64 = call.req(0)?;
let b: String = call.req(1)?;
let flag = call.has_flag("flag");
let opt: Option<i64> = call.opt(2)?;
let named: Option<String> = call.get_flag("named")?;
let rest: Vec<i64> = call.rest(3)?;
eprintln!("Required values");
eprintln!("a: {:}", a);
eprintln!("b: {:}", b);
eprintln!("flag: {:}", flag);
eprintln!("rest: {:?}", rest);
match opt {
Some(v) => eprintln!("Found optional value opt: {:}", v),
None => eprintln!("No optional value found"),
}
match named {
Some(v) => eprintln!("Named value: {:?}", v),
None => eprintln!("No named value found"),
}
fn test2(call: &EvaluatedCall, input: &Value) -> Result<Value, LabeledError> {
print_values(2, call, input)?;
let cols = vec!["one".to_string(), "two".to_string(), "three".to_string()];
@ -145,3 +136,13 @@ fn test2(call: &EvaluatedCall, input: &Value) -> Result<Value, ShellError> {
span: call.head,
})
}
fn test3(call: &EvaluatedCall, input: &Value) -> Result<Value, LabeledError> {
print_values(3, call, input)?;
Err(LabeledError {
label: "ERROR from plugin".into(),
msg: "error message pointing to call head span".into(),
span: Some(call.head),
})
}

33
crates/nu_plugin_inc/src/inc.rs
View File

@ -1,4 +1,5 @@
use nu_protocol::{ShellError, Span, Value};
use nu_plugin::LabeledError;
use nu_protocol::{Span, Value};
#[derive(Debug, Eq, PartialEq)]
pub enum Action {
@ -81,7 +82,7 @@ impl Inc {
"Usage: inc field [--major|--minor|--patch]"
}
pub fn inc(&self, head: Span, value: &Value) -> Result<Value, ShellError> {
pub fn inc(&self, head: Span, value: &Value) -> Result<Value, LabeledError> {
match value {
Value::Int { val, span } => Ok(Value::Int {
val: val + 1,
@ -89,19 +90,21 @@ impl Inc {
}),
Value::String { val, .. } => Ok(self.apply(val)),
x => {
if let Ok(span) = x.span() {
Err(ShellError::PipelineMismatch(
"incrementable value".into(),
head,
span,
))
} else {
Err(ShellError::LabeledError(
"Expected incrementable value".into(),
"incrementable value".into(),
head,
))
}
let msg = x.as_string().map_err(|e| LabeledError {
label: "Unable to extract string".into(),
msg: format!(
"value cannot be converted to string {:?} - {}",
x,
e.to_string()
),
span: Some(head),
})?;
Err(LabeledError {
label: "Incorrect value".into(),
msg,
span: Some(head),
})
}
}
}

6
crates/nu_plugin_inc/src/nu/mod.rs
View File

@ -1,7 +1,7 @@
use crate::inc::SemVerAction;
use crate::Inc;
use nu_plugin::{EvaluatedCall, Plugin};
use nu_protocol::{ShellError, Signature, Span, Value};
use nu_plugin::{EvaluatedCall, LabeledError, Plugin};
use nu_protocol::{Signature, Span, Value};
impl Plugin for Inc {
fn signature(&self) -> Vec<Signature> {
@ -29,7 +29,7 @@ impl Plugin for Inc {
name: &str,
call: &EvaluatedCall,
input: &Value,
) -> Result<Value, ShellError> {
) -> Result<Value, LabeledError> {
if name != "inc" {
return Ok(Value::Nothing {
span: Span::unknown(),