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Merge pull request #23 from wycats/improved-streams

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Improved streams
This commit is contained in:
Yehuda Katz 2019-05-24 11:59:32 -07:00 committed by GitHub
commit cb1c6f4d33
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35 changed files with 1082 additions and 472 deletions
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"checksum signal-hook 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "72ab58f1fda436857e6337dcb6a5aaa34f16c5ddc87b3a8b6ef7a212f90b9c5a"
"checksum signal-hook-registry 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cded4ffa32146722ec54ab1f16320568465aa922aa9ab4708129599740da85d7"
"checksum slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
"checksum smallvec 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)" = "c4488ae950c49d403731982257768f48fada354a5203fe81f9bb6f43ca9002be"
"checksum stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
"checksum stackvector 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c049c77bf85fbc036484c97b008276d539d9ebff9dfbde37b632ebcd5b8746b6"
@ -1880,6 +2073,10 @@ dependencies = [
"checksum textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
"checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
"checksum time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "db8dcfca086c1143c9270ac42a2bbd8a7ee477b78ac8e45b19abfb0cbede4b6f"
"checksum tokio-executor 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "83ea44c6c0773cc034771693711c35c677b4b5a4b21b9e7071704c54de7d555e"
"checksum tokio-fs 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "3fe6dc22b08d6993916647d108a1a7d15b9cd29c4f4496c62b92c45b5041b7af"
"checksum tokio-io 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "5090db468dad16e1a7a54c8c67280c5e4b544f3d3e018f0b913b400261f85926"
"checksum tokio-threadpool 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "72558af20be886ea124595ea0f806dd5703b8958e4705429dd58b3d8231f72f2"
"checksum toml 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b8c96d7873fa7ef8bdeb3a9cda3ac48389b4154f32b9803b4bc26220b677b039"
"checksum ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "535c204ee4d8434478593480b8f86ab45ec9aae0e83c568ca81abf0fd0e88f86"
"checksum unicode-segmentation 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1967f4cdfc355b37fd76d2a954fb2ed3871034eb4f26d60537d88795cfc332a9"

11
Cargo.toml
View File

@ -21,11 +21,18 @@ conch-parser = "0.1.1"
nom = "5.0.0-beta1"
subprocess = "0.1.18"
dunce = "1.0.0"
futures = "0.1.27"
futures-core = "0.2.1"
indexmap = "1.0.2"
chrono-humanize = "0.0.11"
byte-unit = "2.1.0"
ordered-float = "1.0.2"
prettyprint = "0.6.0"
cursive = { version = "0.12.0", features = ["pancurses-backend"], default-features = false }
futures-preview = { version = "0.3.0-alpha.16", features = ["compat", "io-compat"] }
futures-sink-preview = "0.3.0-alpha.16"
tokio-fs = "0.1.6"
futures_codec = "0.2.2"
term = "0.5.2"
[dependencies.pancurses]
version = "0.16"
features = ["win32a"]

1
rustfmt.toml Normal file
View File

@ -0,0 +1 @@
edition = "2018"

357
src/cli.rs Normal file
View File

@ -0,0 +1,357 @@
use crate::prelude::*;
use crate::commands::classified::{
ClassifiedCommand, ClassifiedInputStream, ExternalCommand, InternalCommand, StreamNext,
};
use crate::context::Context;
crate use crate::errors::ShellError;
crate use crate::format::{EntriesListView, GenericView};
use crate::object::Value;
use crate::stream::empty_stream;
use rustyline::error::ReadlineError;
use rustyline::{self, ColorMode, Config, Editor};
use std::collections::VecDeque;
use std::error::Error;
use std::iter::Iterator;
use std::sync::Arc;
#[derive(Debug)]
pub enum MaybeOwned<'a, T> {
Owned(T),
Borrowed(&'a T),
}
impl<T> MaybeOwned<'a, T> {
crate fn borrow(&self) -> &T {
match self {
MaybeOwned::Owned(v) => v,
MaybeOwned::Borrowed(v) => v,
}
}
}
pub async fn cli() -> Result<(), Box<Error>> {
let config = Config::builder().color_mode(ColorMode::Forced).build();
let h = crate::shell::Helper::new();
let mut rl: Editor<crate::shell::Helper> = Editor::with_config(config);
#[cfg(windows)]
{
let _ = ansi_term::enable_ansi_support();
}
rl.set_helper(Some(h));
if rl.load_history("history.txt").is_err() {
println!("No previous history.");
}
let mut context = Context::basic()?;
{
use crate::commands::*;
context.add_commands(vec![
("format-list", Arc::new(format_list)),
("ps", Arc::new(ps::ps)),
("ls", Arc::new(ls::ls)),
("cd", Arc::new(cd::cd)),
("view", Arc::new(view::view)),
("skip", Arc::new(skip::skip)),
("first", Arc::new(take::take)),
("select", Arc::new(select::select)),
("reject", Arc::new(reject::reject)),
("to-array", Arc::new(to_array::to_array)),
("where", Arc::new(where_::r#where)),
("sort-by", Arc::new(sort_by::sort_by)),
]);
}
loop {
let readline = rl.readline(&format!(
"{}> ",
context.env.lock().unwrap().cwd().display().to_string()
));
match process_line(readline, &mut context).await {
LineResult::Success(line) => {
rl.add_history_entry(line.clone());
}
LineResult::Error(err) => {
context.host.lock().unwrap().stdout(&err);
}
LineResult::Break => {
break;
}
LineResult::FatalError(err) => {
context
.host
.lock()
.unwrap()
.stdout(&format!("A surprising fatal error occurred.\n{:?}", err));
}
}
}
rl.save_history("history.txt").unwrap();
Ok(())
}
enum LineResult {
Success(String),
Error(String),
Break,
#[allow(unused)]
FatalError(ShellError),
}
impl std::ops::Try for LineResult {
type Ok = Option<String>;
type Error = ShellError;
fn into_result(self) -> Result<Option<String>, ShellError> {
match self {
LineResult::Success(s) => Ok(Some(s)),
LineResult::Error(s) => Err(ShellError::string(s)),
LineResult::Break => Ok(None),
LineResult::FatalError(err) => Err(err),
}
}
fn from_error(v: ShellError) -> Self {
LineResult::Error(v.to_string())
}
fn from_ok(v: Option<String>) -> Self {
match v {
None => LineResult::Break,
Some(v) => LineResult::Success(v),
}
}
}
async fn process_line(readline: Result<String, ReadlineError>, ctx: &mut Context) -> LineResult {
match &readline {
Ok(line) if line.trim() == "exit" => LineResult::Break,
Ok(line) if line.trim() == "" => LineResult::Success(line.clone()),
Ok(line) => {
let result = match crate::parser::shell_parser(&line) {
Err(err) => {
return LineResult::Error(format!("{:?}", err));
}
Ok(val) => val,
};
let parsed: Result<Vec<_>, _> = result
.1
.into_iter()
.map(|item| classify_command(&item, ctx))
.collect();
let parsed = parsed?;
let mut input = ClassifiedInputStream::new();
let mut iter = parsed.into_iter().peekable();
loop {
let item: Option<ClassifiedCommand> = iter.next();
let next: Option<&ClassifiedCommand> = iter.peek();
input = match (item, next) {
(None, _) => break,
(
Some(ClassifiedCommand::Internal(left)),
Some(ClassifiedCommand::Internal(_)),
) => match left.run(ctx, input).await {
Ok(val) => ClassifiedInputStream::from_input_stream(val),
Err(err) => return LineResult::Error(format!("{}", err.description())),
},
(Some(ClassifiedCommand::Internal(left)), None) => {
match left.run(ctx, input).await {
Ok(val) => ClassifiedInputStream::from_input_stream(val),
Err(err) => return LineResult::Error(format!("{}", err.description())),
}
}
(
Some(ClassifiedCommand::External(left)),
Some(ClassifiedCommand::External(_)),
) => match left.run(ctx, input, StreamNext::External).await {
Ok(val) => val,
Err(err) => return LineResult::Error(format!("{}", err.description())),
},
(
Some(ClassifiedCommand::Internal(_)),
Some(ClassifiedCommand::External(_)),
) => unimplemented!(),
(
Some(ClassifiedCommand::External(left)),
Some(ClassifiedCommand::Internal(_)),
) => match left.run(ctx, input, StreamNext::Internal).await {
Ok(val) => val,
Err(err) => return LineResult::Error(format!("{}", err.description())),
},
(Some(ClassifiedCommand::External(left)), None) => {
match left.run(ctx, input, StreamNext::Last).await {
Ok(val) => val,
Err(err) => return LineResult::Error(format!("{}", err.description())),
}
}
}
// input = match process_command(item.clone(), input, ctx).await {
// Ok(val) => val,
// Err(err) => return LineResult::Error(format!("{}", err.description())),
// };
}
let input_vec: VecDeque<_> = input.objects.collect().await;
if input_vec.len() > 0 {
if equal_shapes(&input_vec) {
let array = crate::commands::stream_to_array(input_vec.boxed()).await;
let args = CommandArgs::from_context(ctx, vec![], array);
let mut result = format(args);
let mut vec = vec![];
vec.send_all(&mut result).await?;
} else {
let args = CommandArgs::from_context(ctx, vec![], input_vec.boxed());
format(args).collect::<Vec<_>>().await;
}
}
LineResult::Success(line.to_string())
}
Err(ReadlineError::Interrupted) => {
println!("CTRL-C");
LineResult::Break
}
Err(ReadlineError::Eof) => {
println!("CTRL-D");
LineResult::Break
}
Err(err) => {
println!("Error: {:?}", err);
LineResult::Break
}
}
}
// async fn process_command(
// parsed: Vec<crate::parser::Item>,
// input: InputStream,
// context: &mut Context,
// ) -> Result<InputStream, ShellError> {
// let command = classify_command(&parsed, context)?;
// command.run(context, input).await
// }
fn classify_command(
command: &[crate::parser::Item],
context: &Context,
) -> Result<ClassifiedCommand, ShellError> {
let command_name = &command[0].name()?;
let arg_list: Vec<Value> = command[1..].iter().map(|i| i.as_value()).collect();
let arg_list_strings: Vec<String> = command[1..].iter().map(|i| i.print()).collect();
match *command_name {
other => match context.has_command(*command_name) {
true => {
let command = context.get_command(command_name);
Ok(ClassifiedCommand::Internal(InternalCommand {
command,
args: arg_list,
}))
}
false => Ok(ClassifiedCommand::External(ExternalCommand {
name: other.to_string(),
args: arg_list_strings,
})),
},
}
}
crate fn format(args: CommandArgs) -> OutputStream {
let host = args.host.clone();
let input = args.input.map(|a| a.copy());
let input = input.collect::<Vec<_>>();
input
.then(move |input| {
let last = input.len() - 1;
let mut host = host.lock().unwrap();
for (i, item) in input.iter().enumerate() {
let view = GenericView::new(item);
crate::format::print_view(&view, &mut *host);
if last != i {
println!("");
}
}
futures::future::ready(empty_stream())
})
.flatten_stream()
.boxed()
}
crate fn format_list(args: CommandArgs) -> Result<OutputStream, ShellError> {
let host = args.host.clone();
// let input = args.input.map(|a| a.copy());
// let input = input.collect::<Vec<_>>();
let view = EntriesListView::from_stream(args.input);
Ok(view
.then(move |view| {
crate::format::print_view(&view, &mut *host.lock().unwrap());
futures::future::ready(empty_stream())
})
.flatten_stream()
.boxed())
// Ok(empty_stream())
// Ok(args
// .input
// .map(|input| {
// let view = EntriesListView::from_stream(input);
// crate::format::print_view(&view, &mut *args.host.lock().unwrap());
// })
// .collect()
// .then(|_| empty_stream())
// .flatten_stream()
// .boxed())
}
fn equal_shapes(input: &VecDeque<Value>) -> bool {
let mut items = input.iter();
let item = match items.next() {
Some(item) => item,
None => return false,
};
let desc = item.data_descriptors();
for item in items {
if desc != item.data_descriptors() {
return false;
}
}
true
}

6
src/commands/cd.rs
View File

@ -2,18 +2,18 @@ use crate::errors::ShellError;
use crate::prelude::*;
use std::env;
pub fn cd(args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellError> {
pub fn cd(args: CommandArgs) -> Result<OutputStream, ShellError> {
let target = match args.args.first() {
// TODO: This needs better infra
None => return Err(ShellError::string(format!("cd must take one arg"))),
Some(v) => v.as_string()?.clone(),
};
let cwd = args.env.cwd().to_path_buf();
let cwd = args.env.lock().unwrap().cwd().to_path_buf();
let mut stream = VecDeque::new();
let path = dunce::canonicalize(cwd.join(&target).as_path())?;
let _ = env::set_current_dir(&path);
stream.push_back(ReturnValue::change_cwd(path));
Ok(stream)
Ok(stream.boxed())
}

150
src/commands/classified.rs
View File

@ -1,44 +1,75 @@
use crate::prelude::*;
use futures::compat::AsyncRead01CompatExt;
use futures_codec::{Framed, LinesCodec};
use std::sync::Arc;
use subprocess::Exec;
crate struct ClassifiedInputStream {
crate objects: InputStream,
crate stdin: Option<std::fs::File>,
}
impl ClassifiedInputStream {
crate fn new() -> ClassifiedInputStream {
ClassifiedInputStream {
objects: VecDeque::new().boxed(),
stdin: None,
}
}
crate fn from_input_stream(stream: InputStream) -> ClassifiedInputStream {
ClassifiedInputStream {
objects: stream,
stdin: None,
}
}
crate fn from_stdout(stdout: std::fs::File) -> ClassifiedInputStream {
ClassifiedInputStream {
objects: VecDeque::new().boxed(),
stdin: Some(stdout),
}
}
}
crate enum ClassifiedCommand {
Internal(InternalCommand),
External(ExternalCommand),
}
impl ClassifiedCommand {
crate fn run(
crate async fn run(
self,
input: VecDeque<Value>,
context: &mut crate::Context,
) -> Result<VecDeque<Value>, ShellError> {
context: &mut Context,
input: ClassifiedInputStream,
) -> Result<InputStream, ShellError> {
match self {
ClassifiedCommand::Internal(internal) => {
let result = context.run_command(internal.command, internal.args, input)?;
let result = context.run_command(internal.command, internal.args, input.objects)?;
let env = context.env.clone();
let mut next = VecDeque::new();
let stream = result.filter_map(move |v| match v {
ReturnValue::Action(action) => match action {
CommandAction::ChangeCwd(cwd) => {
env.lock().unwrap().cwd = cwd;
futures::future::ready(None)
}
},
for v in result {
match v {
ReturnValue::Action(action) => match action {
crate::CommandAction::ChangeCwd(cwd) => context.env.cwd = cwd,
},
ReturnValue::Value(v) => futures::future::ready(Some(v)),
});
ReturnValue::Value(v) => next.push_back(v),
}
}
Ok(next)
Ok(stream.boxed() as InputStream)
}
ClassifiedCommand::External(external) => {
Exec::shell(&external.name)
.args(&external.args)
.cwd(context.env.cwd())
.cwd(context.env.lock().unwrap().cwd())
.join()
.unwrap();
Ok(VecDeque::new())
Ok(VecDeque::new().boxed() as InputStream)
}
}
}
@ -49,7 +80,90 @@ crate struct InternalCommand {
crate args: Vec<Value>,
}
impl InternalCommand {
crate async fn run(
self,
context: &mut Context,
input: ClassifiedInputStream,
) -> Result<InputStream, ShellError> {
let result = context.run_command(self.command, self.args, input.objects)?;
let env = context.env.clone();
let stream = result.filter_map(move |v| match v {
ReturnValue::Action(action) => match action {
CommandAction::ChangeCwd(cwd) => {
env.lock().unwrap().cwd = cwd;
futures::future::ready(None)
}
},
ReturnValue::Value(v) => futures::future::ready(Some(v)),
});
Ok(stream.boxed() as InputStream)
}
}
crate struct ExternalCommand {
crate name: String,
crate args: Vec<String>,
}
crate enum StreamNext {
Last,
External,
Internal,
}
impl ExternalCommand {
crate async fn run(
self,
context: &mut Context,
mut input: ClassifiedInputStream,
stream_next: StreamNext,
) -> Result<ClassifiedInputStream, ShellError> {
let mut process = Exec::shell(&self.name)
.args(&self.args)
.cwd(context.env.lock().unwrap().cwd());
let mut process = match stream_next {
StreamNext::Last => process,
StreamNext::External | StreamNext::Internal => {
process.stdout(subprocess::Redirection::Pipe)
}
};
if let Some(stdin) = input.stdin {
process = process.stdin(stdin);
}
let mut popen = process.popen().unwrap();
match stream_next {
StreamNext::Last => {
popen.wait()?;
Ok(ClassifiedInputStream::new())
}
StreamNext::External => {
let stdout = popen.stdout.take().unwrap();
Ok(ClassifiedInputStream::from_stdout(stdout))
}
StreamNext::Internal => {
let stdout = popen.stdout.take().unwrap();
let file = futures::io::AllowStdIo::new(stdout);
let stream = Framed::new(file, LinesCodec {});
let stream = stream.map(|line| Value::string(line.unwrap()));
Ok(ClassifiedInputStream::from_input_stream(stream.boxed()))
}
}
// if stream_next {
// let stdout = popen.stdout.take().unwrap();
// Ok(ClassifiedInputStream::from_stdout(stdout))
// } else {
// // popen.stdin.take();
// popen.wait()?;
// Ok(ClassifiedInputStream::new())
// }
}
}

31
src/commands/command.rs
View File

@ -1,25 +1,24 @@
use crate::errors::ShellError;
use crate::object::Value;
use crate::prelude::*;
use crate::Context;
use std::path::PathBuf;
pub struct CommandArgs<'caller> {
pub host: &'caller mut dyn Host,
pub env: &'caller crate::Environment,
pub struct CommandArgs {
pub host: Arc<Mutex<dyn Host + Send>>,
pub env: Arc<Mutex<Environment>>,
pub args: Vec<Value>,
pub input: VecDeque<Value>,
pub input: InputStream,
}
impl CommandArgs<'caller> {
impl CommandArgs {
crate fn from_context(
ctx: &'caller mut Context,
args: Vec<Value>,
input: VecDeque<Value>,
) -> CommandArgs<'caller> {
input: InputStream,
) -> CommandArgs {
CommandArgs {
host: &mut ctx.host,
env: &ctx.env,
host: ctx.host.clone(),
env: ctx.env.clone(),
args,
input,
}
@ -38,26 +37,20 @@ pub enum ReturnValue {
}
impl ReturnValue {
crate fn single(value: Value) -> VecDeque<ReturnValue> {
let mut v = VecDeque::new();
v.push_back(ReturnValue::Value(value));
v
}
crate fn change_cwd(path: PathBuf) -> ReturnValue {
ReturnValue::Action(CommandAction::ChangeCwd(path))
}
}
pub trait Command {
fn run(&self, args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellError>;
fn run(&self, args: CommandArgs) -> Result<OutputStream, ShellError>;
}
impl<F> Command for F
where
F: Fn(CommandArgs<'_>) -> Result<VecDeque<ReturnValue>, ShellError>,
F: Fn(CommandArgs) -> Result<OutputStream, ShellError>,
{
fn run(&self, args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellError> {
fn run(&self, args: CommandArgs) -> Result<OutputStream, ShellError> {
self(args)
}
}

6
src/commands/ls.rs
View File

@ -2,8 +2,8 @@ use crate::errors::ShellError;
use crate::object::{dir_entry_dict, Value};
use crate::prelude::*;
pub fn ls(args: CommandArgs<'value>) -> Result<VecDeque<ReturnValue>, ShellError> {
let cwd = args.env.cwd().to_path_buf();
pub fn ls(args: CommandArgs) -> Result<OutputStream, ShellError> {
let cwd = args.env.lock().unwrap().cwd().to_path_buf();
let entries = std::fs::read_dir(&cwd).map_err(|e| ShellError::string(format!("{:?}", e)))?;
@ -14,5 +14,5 @@ pub fn ls(args: CommandArgs<'value>) -> Result<VecDeque<ReturnValue>, ShellError
shell_entries.push_back(ReturnValue::Value(value))
}
Ok(shell_entries)
Ok(shell_entries.boxed())
}

4
src/commands/ps.rs
View File

@ -4,7 +4,7 @@ use crate::object::Value;
use crate::prelude::*;
use sysinfo::SystemExt;
pub fn ps(_args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellError> {
pub fn ps(_args: CommandArgs) -> Result<OutputStream, ShellError> {
let mut system = sysinfo::System::new();
system.refresh_all();
@ -15,5 +15,5 @@ pub fn ps(_args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellErr
.map(|(_, process)| ReturnValue::Value(Value::Object(process_dict(process))))
.collect::<VecDeque<_>>();
Ok(list)
Ok(list.boxed())
}

12
src/commands/reject.rs
View File

@ -3,7 +3,7 @@ use crate::object::base::reject_fields;
use crate::object::Value;
use crate::prelude::*;
pub fn reject(args: CommandArgs<'value>) -> Result<VecDeque<ReturnValue>, ShellError> {
pub fn reject(args: CommandArgs) -> Result<OutputStream, ShellError> {
if args.args.is_empty() {
return Err(ShellError::string("select requires a field"));
}
@ -11,12 +11,10 @@ pub fn reject(args: CommandArgs<'value>) -> Result<VecDeque<ReturnValue>, ShellE
let fields: Result<Vec<String>, _> = args.args.iter().map(|a| a.as_string()).collect();
let fields = fields?;
let objects = args
let stream = args
.input
.iter()
.map(|item| Value::Object(reject_fields(item, &fields)))
.map(|item| ReturnValue::Value(item))
.collect();
.map(move |item| Value::Object(reject_fields(&item, &fields)))
.map(|item| ReturnValue::Value(item));
Ok(objects)
Ok(stream.boxed())
}

11
src/commands/select.rs
View File

@ -3,7 +3,7 @@ use crate::object::base::select_fields;
use crate::object::Value;
use crate::prelude::*;
pub fn select(args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellError> {
pub fn select(args: CommandArgs) -> Result<OutputStream, ShellError> {
if args.args.is_empty() {
return Err(ShellError::string("select requires a field"));
}
@ -13,10 +13,9 @@ pub fn select(args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, Shell
let objects = args
.input
.iter()
.map(|item| Value::Object(select_fields(item, &fields)))
.map(|item| ReturnValue::Value(item))
.collect();
.map(move |item| Value::Object(select_fields(&item, &fields)))
.map(|item| ReturnValue::Value(item));
Ok(objects)
let stream = Pin::new(Box::new(objects));
Ok(stream)
}

18
src/commands/skip.rs
View File

@ -1,21 +1,13 @@
use crate::errors::ShellError;
use crate::prelude::*;
pub fn skip(args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellError> {
pub fn skip(args: CommandArgs) -> Result<OutputStream, ShellError> {
let amount = args.args[0].as_int()?;
let amount = if args.input.len() > amount as usize {
amount as usize
} else {
args.input.len()
};
let input = args.input;
let out: VecDeque<ReturnValue> = args
.input
.into_iter()
.skip(amount)
Ok(input
.skip(amount as u64)
.map(|v| ReturnValue::Value(v))
.collect();
Ok(out)
.boxed())
}

28
src/commands/sort_by.rs
View File

@ -1,23 +1,25 @@
use crate::errors::ShellError;
use crate::prelude::*;
pub fn sort_by(args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellError> {
pub fn sort_by(args: CommandArgs) -> Result<OutputStream, ShellError> {
let fields: Result<Vec<_>, _> = args.args.iter().map(|a| a.as_string()).collect();
let fields = fields?;
let mut output = args.input.into_iter().collect::<Vec<_>>();
let output = args.input.collect::<Vec<_>>();
output.sort_by_key(|item| {
fields
.iter()
.map(|f| item.get_data_by_key(f).borrow().copy())
.collect::<Vec<Value>>()
let output = output.map(move |mut vec| {
vec.sort_by_key(|item| {
fields
.iter()
.map(|f| item.get_data_by_key(f).borrow().copy())
.collect::<Vec<Value>>()
});
vec.into_iter()
.map(|v| ReturnValue::Value(v.copy()))
.collect::<VecDeque<_>>()
.boxed()
});
let output = output
.iter()
.map(|o| ReturnValue::Value(o.copy()))
.collect();
Ok(output)
Ok(output.flatten_stream().boxed())
}

18
src/commands/take.rs
View File

@ -3,21 +3,13 @@ use crate::prelude::*;
// TODO: "Amount remaining" wrapper
pub fn take(args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellError> {
pub fn take(args: CommandArgs) -> Result<OutputStream, ShellError> {
let amount = args.args[0].as_int()?;
let amount = if args.input.len() > amount as usize {
amount as usize
} else {
args.input.len()
};
let input = args.input;
let out: VecDeque<ReturnValue> = args
.input
.into_iter()
.take(amount)
Ok(input
.take(amount as u64)
.map(|v| ReturnValue::Value(v))
.collect();
Ok(out)
.boxed())
}

16
src/commands/to_array.rs
View File

@ -1,15 +1,17 @@
use crate::errors::ShellError;
use crate::object::Value;
use crate::prelude::*;
pub fn to_array(args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellError> {
let out = args.input.into_iter().collect();
Ok(ReturnValue::single(Value::List(out)))
pub fn to_array(args: CommandArgs) -> Result<OutputStream, ShellError> {
let out = args.input.collect();
Ok(out
.map(|vec: Vec<_>| single_output(Value::List(vec)))
.flatten_stream()
.boxed())
}
crate fn stream_to_array(stream: VecDeque<Value>) -> VecDeque<Value> {
let out = Value::List(stream.into_iter().collect());
crate async fn stream_to_array(stream: InputStream) -> InputStream {
let out = Value::List(stream.collect().await);
let mut stream = VecDeque::new();
stream.push_back(out);
stream
stream.boxed() as InputStream
}

6
src/commands/view.rs
View File

@ -2,14 +2,14 @@ use crate::errors::ShellError;
use crate::prelude::*;
use prettyprint::PrettyPrinter;
pub fn view(args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellError> {
pub fn view(args: CommandArgs) -> Result<OutputStream, ShellError> {
let target = match args.args.first() {
// TODO: This needs better infra
None => return Err(ShellError::string(format!("cat must take one arg"))),
Some(v) => v.as_string()?.clone(),
};
let cwd = args.env.cwd().to_path_buf();
let cwd = args.env.lock().unwrap().cwd().to_path_buf();
let printer = PrettyPrinter::default()
.line_numbers(false)
@ -22,5 +22,5 @@ pub fn view(args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellEr
let _ = printer.file(file.display().to_string());
Ok(VecDeque::new())
Ok(VecDeque::new().boxed())
}

23
src/commands/where_.rs
View File

@ -2,26 +2,27 @@ use crate::errors::ShellError;
use crate::object::base::find;
use crate::prelude::*;
pub fn r#where(args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellError> {
pub fn r#where(args: CommandArgs) -> Result<OutputStream, ShellError> {
if args.args.is_empty() {
return Err(ShellError::string("select requires a field"));
}
let field: Result<String, _> = args.args[0].as_string();
let field = field?;
let input = args.input;
let operator = args.args[1].copy();
match args.args[1] {
Value::Primitive(Primitive::Operator(ref operator)) => {
let objects = args
.input
.iter()
.filter(|item| find(&item, &field, operator, &args.args[2]))
.map(|item| ReturnValue::Value(item.copy()))
.collect();
match operator {
Value::Primitive(Primitive::Operator(operator)) => {
let right = args.args[2].copy();
Ok(objects)
let objects = input
.filter(move |item| futures::future::ready(find(&item, &field, &operator, &right)))
.map(|item| ReturnValue::Value(item.copy()));
Ok(objects.boxed())
}
ref x => {
x => {
println!("{:?}", x);
Err(ShellError::string("expected a comparison operator"))
}

20
src/context.rs
View File

@ -4,21 +4,21 @@ use std::error::Error;
use std::sync::Arc;
pub struct Context {
commands: indexmap::IndexMap<String, Arc<dyn crate::Command>>,
crate host: Box<dyn crate::Host>,
crate env: Environment,
commands: indexmap::IndexMap<String, Arc<dyn Command>>,
crate host: Arc<Mutex<dyn Host + Send>>,
crate env: Arc<Mutex<Environment>>,
}
impl Context {
crate fn basic() -> Result<Context, Box<Error>> {
Ok(Context {
commands: indexmap::IndexMap::new(),
host: Box::new(crate::env::host::BasicHost),
env: crate::Environment::basic()?,
host: Arc::new(Mutex::new(crate::env::host::BasicHost)),
env: Arc::new(Mutex::new(Environment::basic()?)),
})
}
pub fn add_commands(&mut self, commands: Vec<(&str, Arc<dyn crate::Command>)>) {
pub fn add_commands(&mut self, commands: Vec<(&str, Arc<dyn Command>)>) {
for (name, command) in commands {
self.commands.insert(name.to_string(), command);
}
@ -36,11 +36,11 @@ impl Context {
&mut self,
command: Arc<dyn Command>,
arg_list: Vec<Value>,
input: VecDeque<Value>,
) -> Result<VecDeque<ReturnValue>, ShellError> {
input: InputStream,
) -> Result<OutputStream, ShellError> {
let command_args = CommandArgs {
host: &mut self.host,
env: &self.env,
host: self.host.clone(),
env: self.env.clone(),
args: arg_list,
input,
};

29
src/env/host.rs vendored
View File

@ -1,9 +1,20 @@
pub trait Host {
fn out_terminal(&self) -> Box<term::StdoutTerminal>;
fn err_terminal(&self) -> Box<term::StderrTerminal>;
fn stdout(&mut self, out: &str);
fn stderr(&mut self, out: &str);
}
impl Host for Box<dyn Host> {
fn out_terminal(&self) -> Box<term::StdoutTerminal> {
(**self).out_terminal()
}
fn err_terminal(&self) -> Box<term::StderrTerminal> {
(**self).err_terminal()
}
fn stdout(&mut self, out: &str) {
(**self).stdout(out)
}
@ -16,11 +27,25 @@ impl Host for Box<dyn Host> {
crate struct BasicHost;
impl Host for BasicHost {
fn out_terminal(&self) -> Box<term::StdoutTerminal> {
term::stdout().unwrap()
}
fn err_terminal(&self) -> Box<term::StderrTerminal> {
term::stderr().unwrap()
}
fn stdout(&mut self, out: &str) {
println!("{}", out)
match out {
"\n" => println!(""),
other => println!("{}", other),
}
}
fn stderr(&mut self, out: &str) {
eprintln!("{}", out)
match out {
"\n" => eprintln!(""),
other => eprintln!("{}", other),
}
}
}

19
src/errors.rs
View File

@ -1,7 +1,6 @@
#[allow(unused)]
use crate::prelude::*;
use crate::Value;
use derive_new::new;
#[derive(Debug, Ord, PartialOrd, Eq, PartialEq, new)]
@ -43,3 +42,21 @@ impl std::convert::From<std::io::Error> for ShellError {
}
}
}
impl std::convert::From<futures_sink::VecSinkError> for ShellError {
fn from(_input: futures_sink::VecSinkError) -> ShellError {
ShellError {
title: format!("Unexpected Vec Sink Error"),
error: Value::nothing(),
}
}
}
impl std::convert::From<subprocess::PopenError> for ShellError {
fn from(input: subprocess::PopenError) -> ShellError {
ShellError {
title: format!("{}", input),
error: Value::nothing(),
}
}
}

13
src/format.rs
View File

@ -10,16 +10,9 @@ crate use generic::GenericView;
crate use table::TableView;
crate trait RenderView {
fn render_view(&self, host: &dyn Host) -> Vec<String>;
fn render_view(&self, host: &mut dyn Host) -> Result<(), ShellError>;
}
fn print_rendered(lines: &[String], host: &mut dyn Host) {
for line in lines {
host.stdout(line);
}
}
crate fn print_view(view: &impl RenderView, host: &mut Host) {
// let mut ctx = context.lock().unwrap();
crate::format::print_rendered(&view.render_view(host), host);
crate fn print_view(view: &impl RenderView, host: &mut dyn Host) -> Result<(), ShellError> {
view.render_view(host)
}

48
src/format/entries.rs
View File

@ -1,6 +1,5 @@
use crate::format::RenderView;
use crate::prelude::*;
use crate::Host;
use derive_new::new;
@ -11,7 +10,7 @@ use derive_new::new;
// another_name : ...
#[derive(new)]
pub struct EntriesView {
entries: Vec<(String, String)>,
entries: Vec<(crate::object::DescriptorName, String)>,
}
impl EntriesView {
@ -32,17 +31,28 @@ impl EntriesView {
}
impl RenderView for EntriesView {
fn render_view(&self, _host: &dyn Host) -> Vec<String> {
fn render_view(&self, _host: &mut dyn Host) -> Result<(), ShellError> {
if self.entries.len() == 0 {
return vec![];
return Ok(());
}
let max_name_size: usize = self.entries.iter().map(|(n, _)| n.len()).max().unwrap();
self.entries
let max_name_size: usize = self
.entries
.iter()
.map(|(k, v)| format!("{:width$} : {}", k, v, width = max_name_size))
.collect()
.map(|(n, _)| n.display().len())
.max()
.unwrap();
for (name, value) in &self.entries {
println!(
"{:width$} : {}",
name.display(),
value,
width = max_name_size
)
}
Ok(())
}
}
@ -51,32 +61,30 @@ pub struct EntriesListView {
}
impl EntriesListView {
crate fn from_stream(values: VecDeque<Value>) -> EntriesListView {
EntriesListView { values }
crate async fn from_stream(values: InputStream) -> EntriesListView {
EntriesListView {
values: values.collect().await,
}
}
}
impl RenderView for EntriesListView {
fn render_view(&self, host: &dyn Host) -> Vec<String> {
fn render_view(&self, host: &mut dyn Host) -> Result<(), ShellError> {
if self.values.len() == 0 {
return vec![];
return Ok(());
}
let mut strings = vec![];
let last = self.values.len() - 1;
for (i, item) in self.values.iter().enumerate() {
let view = EntriesView::from_value(item);
let out = view.render_view(host);
strings.extend(out);
view.render_view(host);
if i != last {
strings.push("\n".to_string());
host.stdout("\n");
}
}
strings
Ok(())
}
}

21
src/format/generic.rs
View File

@ -1,6 +1,6 @@
use crate::format::{EntriesView, RenderView, TableView};
use crate::object::Value;
use crate::Host;
use crate::prelude::*;
use derive_new::new;
// A list is printed one line at a time with an optional separator between groups
@ -10,17 +10,17 @@ pub struct GenericView<'value> {
}
impl RenderView for GenericView<'value> {
fn render_view(&self, host: &dyn Host) -> Vec<String> {
fn render_view(&self, host: &mut dyn Host) -> Result<(), ShellError> {
match self.value {
Value::Primitive(p) => vec![p.format(None)],
Value::Primitive(p) => Ok(host.stdout(&p.format(None))),
Value::List(l) => {
let view = TableView::from_list(l);
if let Some(view) = view {
view.render_view(host)
} else {
vec![]
view.render_view(host);
}
Ok(())
// let mut list: Vec<String> = vec![];
// for item in l {
// match item {
@ -39,11 +39,14 @@ impl RenderView for GenericView<'value> {
o @ Value::Object(_) => {
let view = EntriesView::from_value(o);
let out = view.render_view(host);
out
view.render_view(host);
Ok(())
}
Value::Error(e) => vec![format!("{}", e)],
Value::Error(e) => {
host.stdout(&format!("{:?}", e));
Ok(())
}
}
}
}

10
src/format/list.rs
View File

@ -1,5 +1,5 @@
use crate::format::RenderView;
use crate::Host;
use crate::prelude::*;
use derive_new::new;
// A list is printed one line at a time with an optional separator between groups
@ -11,14 +11,12 @@ pub struct ListView {
}
impl RenderView for ListView {
fn render_view(&self, _host: &dyn Host) -> Vec<String> {
let mut out = vec![];
fn render_view(&self, host: &mut dyn Host) -> Result<(), ShellError> {
for output in &self.list {
let string: String = output.iter().map(|l| format!("{}\n", l)).collect();
out.push(format!("{}{}", string, self.sep));
host.stdout(&format!("{}{}", string, self.sep));
}
out
Ok(())
}
}

32
src/format/table.rs
View File

@ -1,8 +1,9 @@
use crate::format::RenderView;
use crate::object::Value;
use crate::Host;
use crate::prelude::*;
use ansi_term::Color;
use derive_new::new;
use prettytable::{Cell, Row, Table};
use prettytable::{color, Attr, Cell, Row, Table};
// An entries list is printed like this:
//
@ -24,7 +25,7 @@ impl TableView {
let item = &values[0];
let descs = item.data_descriptors();
let headers: Vec<String> = descs.iter().map(|d| d.name.clone()).collect();
let headers: Vec<String> = descs.iter().map(|d| d.name.display().to_string()).collect();
let mut entries = vec![];
@ -43,13 +44,27 @@ impl TableView {
}
impl RenderView for TableView {
fn render_view(&self, _host: &dyn Host) -> Vec<String> {
fn render_view(&self, host: &mut dyn Host) -> Result<(), ShellError> {
if self.entries.len() == 0 {
return vec![];
return Ok(());
}
let mut table = Table::new();
let header: Vec<Cell> = self.headers.iter().map(|h| Cell::new(h)).collect();
// let format = prettytable::format::FormatBuilder::new();
// .column_separator(Color::Black.bold().paint("|"));
table.set_format(*prettytable::format::consts::FORMAT_NO_COLSEP);
let header: Vec<Cell> = self
.headers
.iter()
.map(|h| {
Cell::new(h)
.with_style(Attr::ForegroundColor(color::GREEN))
.with_style(Attr::Bold)
})
.collect();
table.add_row(Row::new(header));
@ -57,9 +72,8 @@ impl RenderView for TableView {
table.add_row(Row::new(row.iter().map(|h| Cell::new(h)).collect()));
}
let mut out = vec![];
table.print(&mut out).unwrap();
table.print_term(&mut *host.out_terminal()).unwrap();
vec![String::from_utf8_lossy(&out).to_string()]
Ok(())
}
}

243
src/main.rs
View File

@ -1,9 +1,10 @@
#![feature(crate_visibility_modifier)]
#![feature(in_band_lifetimes)]
#![feature(async_await)]
#![feature(try_trait)]
#![feature(bind_by_move_pattern_guards)]
#[allow(unused)]
use crate::prelude::*;
mod cli;
mod commands;
mod context;
mod env;
@ -13,243 +14,11 @@ mod object;
mod parser;
mod prelude;
mod shell;
mod stream;
use crate::commands::classified::{ClassifiedCommand, ExternalCommand, InternalCommand};
use crate::commands::command::ReturnValue;
crate use crate::commands::command::{Command, CommandAction};
use crate::context::Context;
crate use crate::env::{Environment, Host};
crate use crate::errors::ShellError;
crate use crate::format::{EntriesListView, GenericView};
use crate::object::Value;
use rustyline::error::ReadlineError;
use rustyline::{self, ColorMode, Config, Editor};
use std::collections::VecDeque;
use std::error::Error;
use std::sync::Arc;
#[derive(Debug)]
pub enum MaybeOwned<'a, T> {
Owned(T),
Borrowed(&'a T),
}
impl<T> MaybeOwned<'a, T> {
crate fn borrow(&self) -> &T {
match self {
MaybeOwned::Owned(v) => v,
MaybeOwned::Borrowed(v) => v,
}
}
}
fn main() -> Result<(), Box<Error>> {
let config = Config::builder().color_mode(ColorMode::Forced).build();
let h = crate::shell::Helper::new();
let mut rl: Editor<crate::shell::Helper> = Editor::with_config(config);
#[cfg(windows)]
{
let _ = ansi_term::enable_ansi_support();
}
rl.set_helper(Some(h));
if rl.load_history("history.txt").is_err() {
println!("No previous history.");
}
let mut context = Context::basic()?;
{
use crate::commands::*;
context.add_commands(vec![
("format", Arc::new(format)),
("format-list", Arc::new(format_list)),
("ps", Arc::new(ps::ps)),
("ls", Arc::new(ls::ls)),
("cd", Arc::new(cd::cd)),
("view", Arc::new(view::view)),
("skip", Arc::new(skip::skip)),
("take", Arc::new(take::take)),
("select", Arc::new(select::select)),
("reject", Arc::new(reject::reject)),
("to-array", Arc::new(to_array::to_array)),
("where", Arc::new(where_::r#where)),
("sort-by", Arc::new(sort_by::sort_by)),
]);
}
loop {
let readline = rl.readline(&format!("{}> ", context.env.cwd().display().to_string()));
match process_line(readline, &mut context) {
LineResult::Success(line) => {
rl.add_history_entry(line.clone());
}
LineResult::Error(err) => {
context.host.stdout(&err);
}
LineResult::Break => {
break;
}
LineResult::FatalError(err) => {
context
.host
.stdout(&format!("A surprising fatal error occurred.\n{:?}", err));
}
}
}
rl.save_history("history.txt").unwrap();
futures::executor::block_on(crate::cli::cli())?;
Ok(())
}
enum LineResult {
Success(String),
Error(String),
Break,
#[allow(unused)]
FatalError(ShellError),
}
fn process_line(readline: Result<String, ReadlineError>, ctx: &mut Context) -> LineResult {
match &readline {
Ok(line) if line.trim() == "exit" => LineResult::Break,
Ok(line) if line.trim() == "" => LineResult::Success(line.clone()),
Ok(line) => {
let result = match crate::parser::shell_parser(&line) {
Err(err) => {
return LineResult::Error(format!("{:?}", err));
}
Ok(val) => val,
};
let parsed = result.1;
let mut input = VecDeque::new();
for item in parsed {
input = match process_command(item.clone(), input, ctx) {
Ok(val) => val,
Err(err) => return LineResult::Error(format!("{}", err.description())),
};
}
if input.len() > 0 {
if equal_shapes(&input) {
let array = crate::commands::stream_to_array(input);
let args = CommandArgs::from_context(ctx, vec![], array);
match format(args) {
Ok(_) => {}
Err(err) => return LineResult::Error(err.to_string()),
}
} else {
let args = CommandArgs::from_context(ctx, vec![], input);
match format(args) {
Ok(_) => {}
Err(err) => return LineResult::Error(err.to_string()),
}
}
}
LineResult::Success(line.to_string())
}
Err(ReadlineError::Interrupted) => {
println!("CTRL-C");
LineResult::Break
}
Err(ReadlineError::Eof) => {
println!("CTRL-D");
LineResult::Break
}
Err(err) => {
println!("Error: {:?}", err);
LineResult::Break
}
}
}
fn process_command(
parsed: Vec<crate::parser::Item>,
input: VecDeque<Value>,
context: &mut Context,
) -> Result<VecDeque<Value>, ShellError> {
let command = classify_command(&parsed, context)?;
command.run(input, context)
}
fn classify_command(
command: &[crate::parser::Item],
context: &Context,
) -> Result<ClassifiedCommand, ShellError> {
let command_name = &command[0].name()?;
let arg_list: Vec<Value> = command[1..].iter().map(|i| i.as_value()).collect();
let arg_list_strings: Vec<String> = command[1..].iter().map(|i| i.print()).collect();
match *command_name {
other => match context.has_command(*command_name) {
true => {
let command = context.get_command(command_name);
Ok(ClassifiedCommand::Internal(InternalCommand {
command,
args: arg_list,
}))
}
false => Ok(ClassifiedCommand::External(ExternalCommand {
name: other.to_string(),
args: arg_list_strings,
})),
},
}
}
fn format(args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellError> {
let last = args.input.len() - 1;
for (i, item) in args.input.iter().enumerate() {
let view = GenericView::new(item);
crate::format::print_view(&view, args.host);
if last != i {
println!("");
}
}
Ok(VecDeque::new())
}
fn format_list(args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellError> {
let view = EntriesListView::from_stream(args.input);
crate::format::print_view(&view, args.host);
Ok(VecDeque::new())
}
fn equal_shapes(input: &VecDeque<Value>) -> bool {
let mut items = input.iter();
let item = match items.next() {
Some(item) => item,
None => return false,
};
let desc = item.data_descriptors();
for item in items {
if desc != item.data_descriptors() {
return false;
}
}
true
}

1
src/object.rs
View File

@ -6,5 +6,6 @@ crate mod process;
crate mod types;
crate use base::{Primitive, Value};
crate use desc::{DataDescriptor, DescriptorName};
crate use dict::Dictionary;
crate use files::dir_entry_dict;

37
src/object/base.rs
View File

@ -1,6 +1,7 @@
use crate::errors::ShellError;
use crate::object::desc::DataDescriptor;
use crate::object::{DataDescriptor, DescriptorName};
use crate::parser::parse::Operator;
use crate::prelude::*;
use ansi_term::Color;
use chrono::{DateTime, Utc};
use chrono_humanize::Humanize;
@ -68,28 +69,28 @@ pub enum Value {
impl Value {
crate fn data_descriptors(&self) -> Vec<DataDescriptor> {
match self {
Value::Primitive(_) => vec![],
Value::Primitive(_) => vec![DataDescriptor::value_of()],
Value::Object(o) => o.data_descriptors(),
Value::List(_) => vec![],
Value::Error(_) => vec![],
}
}
crate fn get_data_by_key(&'a self, name: &str) -> crate::MaybeOwned<'a, Value> {
crate fn get_data_by_key(&'a self, name: &str) -> MaybeOwned<'a, Value> {
match self {
Value::Primitive(_) => crate::MaybeOwned::Owned(Value::nothing()),
Value::Primitive(_) => MaybeOwned::Owned(Value::nothing()),
Value::Object(o) => o.get_data_by_key(name),
Value::List(_) => crate::MaybeOwned::Owned(Value::nothing()),
Value::Error(_) => crate::MaybeOwned::Owned(Value::nothing()),
Value::List(_) => MaybeOwned::Owned(Value::nothing()),
Value::Error(_) => MaybeOwned::Owned(Value::nothing()),
}
}
crate fn get_data(&'a self, desc: &DataDescriptor) -> crate::MaybeOwned<'a, Value> {
crate fn get_data(&'a self, desc: &DataDescriptor) -> MaybeOwned<'a, Value> {
match self {
Value::Primitive(_) => crate::MaybeOwned::Owned(Value::nothing()),
p @ Value::Primitive(_) => MaybeOwned::Borrowed(p),
Value::Object(o) => o.get_data(desc),
Value::List(_) => crate::MaybeOwned::Owned(Value::nothing()),
Value::Error(_) => crate::MaybeOwned::Owned(Value::nothing()),
Value::List(_) => MaybeOwned::Owned(Value::nothing()),
Value::Error(_) => MaybeOwned::Owned(Value::nothing()),
}
}
@ -202,9 +203,9 @@ crate fn select_fields(obj: &Value, fields: &[String]) -> crate::object::Diction
let descs = obj.data_descriptors();
for field in fields {
match descs.iter().find(|d| d.name == *field) {
None => out.add(field.to_string(), Value::nothing()),
Some(desc) => out.add(field.to_string(), obj.get_data(desc).borrow().copy()),
match descs.iter().find(|d| d.name.is_string(field)) {
None => out.add(DataDescriptor::for_string_name(field), Value::nothing()),
Some(desc) => out.add(desc.copy(), obj.get_data(desc).borrow().copy()),
}
}
@ -217,10 +218,10 @@ crate fn reject_fields(obj: &Value, fields: &[String]) -> crate::object::Diction
let descs = obj.data_descriptors();
for desc in descs {
if fields.contains(&desc.name) {
continue;
} else {
out.add(desc.name.clone(), obj.get_data(&desc).borrow().copy())
match desc.name.as_string() {
None => continue,
Some(s) if fields.iter().any(|field| field == s) => continue,
Some(s) => out.add(desc.copy(), obj.get_data(&desc).borrow().copy()),
}
}
@ -229,7 +230,7 @@ crate fn reject_fields(obj: &Value, fields: &[String]) -> crate::object::Diction
crate fn find(obj: &Value, field: &str, op: &Operator, rhs: &Value) -> bool {
let descs = obj.data_descriptors();
match descs.iter().find(|d| d.name == *field) {
match descs.iter().find(|d| d.name.is_string(field)) {
None => false,
Some(desc) => {
let v = obj.get_data(desc).borrow().copy();

101
src/object/desc.rs
View File

@ -1,17 +1,110 @@
use crate::object::types::Type;
use crate::object::types::{AnyShell, Type};
use derive_new::new;
#[derive(new)]
#[derive(Debug, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub enum DescriptorName {
String(String),
ValueOf,
}
impl DescriptorName {
crate fn display(&self) -> &str {
match self {
DescriptorName::String(s) => s,
DescriptorName::ValueOf => "value",
}
}
crate fn as_string(&self) -> Option<&str> {
match self {
DescriptorName::String(s) => Some(s),
DescriptorName::ValueOf => None,
}
}
crate fn is_string(&self, string: &str) -> bool {
match self {
DescriptorName::String(s) => s == string,
DescriptorName::ValueOf => false,
}
}
}
#[derive(Debug, new)]
pub struct DataDescriptor {
crate name: String,
crate name: DescriptorName,
crate readonly: bool,
crate ty: Box<dyn Type>,
}
impl From<&str> for DataDescriptor {
fn from(input: &str) -> DataDescriptor {
DataDescriptor {
name: DescriptorName::String(input.to_string()),
readonly: true,
ty: Box::new(AnyShell),
}
}
}
impl From<String> for DataDescriptor {
fn from(input: String) -> DataDescriptor {
DataDescriptor {
name: DescriptorName::String(input),
readonly: true,
ty: Box::new(AnyShell),
}
}
}
impl PartialEq for DataDescriptor {
fn eq(&self, other: &DataDescriptor) -> bool {
self.name == other.name && self.readonly == other.readonly && self.ty.equal(&*other.ty)
}
}
impl DataDescriptor {}
impl std::hash::Hash for DataDescriptor {
fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
self.name.hash(state);
self.readonly.hash(state);
self.ty.id().hash(state);
}
}
impl Eq for DataDescriptor {}
impl DescriptorName {
crate fn for_string_name(name: impl Into<String>) -> DescriptorName {
DescriptorName::String(name.into())
}
}
impl DataDescriptor {
crate fn value_of() -> DataDescriptor {
DataDescriptor {
name: DescriptorName::ValueOf,
readonly: true,
ty: Box::new(AnyShell),
}
}
crate fn for_name(name: impl Into<DescriptorName>) -> DataDescriptor {
DataDescriptor {
name: name.into(),
readonly: true,
ty: Box::new(AnyShell),
}
}
crate fn for_string_name(name: impl Into<String>) -> DataDescriptor {
DataDescriptor::for_name(DescriptorName::for_string_name(name))
}
crate fn copy(&self) -> DataDescriptor {
DataDescriptor {
name: self.name.clone(),
readonly: self.readonly,
ty: self.ty.copy(),
}
}
}

27
src/object/dict.rs
View File

@ -1,15 +1,13 @@
#[allow(unused)]
use crate::prelude::*;
use crate::object::desc::DataDescriptor;
use crate::object::{DataDescriptor, DescriptorName};
use crate::object::{Primitive, Value};
use crate::MaybeOwned;
use indexmap::IndexMap;
use std::cmp::{Ordering, PartialOrd};
#[derive(Debug, Default, Eq, PartialEq)]
pub struct Dictionary {
entries: IndexMap<String, Value>,
entries: IndexMap<DataDescriptor, Value>,
}
impl PartialOrd for Dictionary {
@ -43,7 +41,7 @@ impl PartialEq<Value> for Dictionary {
}
impl Dictionary {
crate fn add(&mut self, name: impl Into<String>, value: Value) {
crate fn add(&mut self, name: impl Into<DataDescriptor>, value: Value) {
self.entries.insert(name.into(), value);
}
@ -51,31 +49,30 @@ impl Dictionary {
let mut out = Dictionary::default();
for (key, value) in self.entries.iter() {
out.add(key.clone(), value.copy());
out.add(key.copy(), value.copy());
}
out
}
crate fn data_descriptors(&self) -> Vec<DataDescriptor> {
self.entries
.iter()
.map(|(name, _)| {
DataDescriptor::new(name.clone(), true, Box::new(crate::object::types::AnyShell))
})
.collect()
self.entries.iter().map(|(name, _)| name.copy()).collect()
}
crate fn get_data(&'a self, desc: &DataDescriptor) -> MaybeOwned<'a, Value> {
match self.entries.get(&desc.name) {
match self.entries.get(desc) {
Some(v) => MaybeOwned::Borrowed(v),
None => MaybeOwned::Owned(Value::Primitive(Primitive::Nothing)),
}
}
crate fn get_data_by_key(&self, name: &str) -> MaybeOwned<'_, Value> {
match self.entries.get(name) {
Some(v) => MaybeOwned::Borrowed(v),
match self
.entries
.iter()
.find(|(desc_name, _)| desc_name.name.is_string(name))
{
Some((_, v)) => MaybeOwned::Borrowed(v),
None => MaybeOwned::Owned(Value::Primitive(Primitive::Nothing)),
}
}

15
src/object/types.rs
View File

@ -1,11 +1,14 @@
use std::any::Any;
use std::fmt::Debug;
pub trait Type {
pub trait Type: Debug + Send {
fn as_any(&self) -> &dyn Any;
fn equal(&self, other: &dyn Type) -> bool;
fn id(&self) -> u64;
fn copy(&self) -> Box<Type>;
}
#[derive(Eq, PartialEq)]
#[derive(Debug, Eq, PartialEq)]
pub struct AnyShell;
impl Type for AnyShell {
@ -16,4 +19,12 @@ impl Type for AnyShell {
fn equal(&self, other: &dyn Type) -> bool {
other.as_any().is::<AnyShell>()
}
fn id(&self) -> u64 {
0
}
fn copy(&self) -> Box<Type> {
Box::new(AnyShell)
}
}

3
src/parser/completer.rs
View File

@ -1,9 +1,10 @@
use crate::prelude::*;
use rustyline::{completion, Context};
use std::collections::BTreeMap;
#[allow(unused)]
crate struct Completer {
commands: BTreeMap<String, Box<dyn crate::Command>>,
commands: BTreeMap<String, Box<dyn Command>>,
}
impl completion::Completer for Completer {

2
src/parser/parse.rs
View File

@ -17,7 +17,7 @@ pub enum Item {
Operator(Operator),
}
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
pub enum Operator {
Equal,
NotEqual,

10
src/prelude.rs
View File

@ -1,5 +1,13 @@
crate use crate::commands::command::{Command, CommandArgs, ReturnValue};
crate use crate::cli::MaybeOwned;
crate use crate::commands::command::{Command, CommandAction, CommandArgs, ReturnValue};
crate use crate::context::Context;
crate use crate::env::{Environment, Host};
crate use crate::errors::ShellError;
crate use crate::object::{Primitive, Value};
#[allow(unused)]
crate use crate::stream::{empty_stream, single_output, InputStream, OutputStream};
#[allow(unused)]
crate use futures::{Future, FutureExt, Sink, SinkExt, Stream, StreamExt};
crate use std::collections::VecDeque;
crate use std::pin::Pin;
crate use std::sync::{Arc, Mutex};

16
src/stream.rs Normal file
View File

@ -0,0 +1,16 @@
use crate::prelude::*;
use futures::stream::BoxStream;
pub type InputStream = BoxStream<'static, Value>;
pub type OutputStream = BoxStream<'static, ReturnValue>;
crate fn empty_stream() -> OutputStream {
VecDeque::new().boxed()
}
crate fn single_output(item: Value) -> OutputStream {
let value = ReturnValue::Value(item);
let mut vec = VecDeque::new();
vec.push_back(value);
vec.boxed()
}