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Add sinks

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This commit is contained in:
Jonathan Turner 2019-06-07 18:34:42 +12:00
parent 4582822d62
commit 090ec031a9
7 changed files with 182 additions and 102 deletions
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168
src/cli.rs
View file

@ -1,3 +1,7 @@
use crate::commands::autoview;
use crate::commands::classified::SinkCommand;
use crate::commands::command::sink;
use crate::prelude::*;
use crate::commands::classified::{
@ -7,17 +11,16 @@ use crate::commands::classified::{
use crate::context::Context;
crate use crate::errors::ShellError;
use crate::evaluate::Scope;
crate use crate::format::{EntriesListView, GenericView};
use crate::git::current_branch;
use crate::object::Value;
use crate::parser::ast::{Expression, Leaf, RawExpression};
use crate::parser::{Args, Pipeline};
use crate::stream::empty_stream;
use log::debug;
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::atomic::{AtomicBool, Ordering};
@ -44,7 +47,6 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
use crate::commands::*;
context.add_commands(vec![
command("format-list", format_list),
command("ps", ps::ps),
command("ls", ls::ls),
command("cd", cd::cd),
@ -69,6 +71,8 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
Arc::new(Config),
command("sort-by", sort_by::sort_by),
]);
context.add_sinks(vec![sink("autoview", autoview::autoview)]);
}
let config = Config::builder().color_mode(ColorMode::Forced).build();
@ -212,7 +216,18 @@ async fn process_line(readline: Result<String, ReadlineError>, ctx: &mut Context
debug!("=== Parsed ===");
debug!("{:#?}", result);
let pipeline = classify_pipeline(&result, ctx)?;
let mut pipeline = classify_pipeline(&result, ctx)?;
match pipeline.commands.last() {
Some(ClassifiedCommand::Sink(_)) => {}
_ => pipeline.commands.push(ClassifiedCommand::Sink(SinkCommand {
command: sink("autoview", autoview::autoview),
args: Args {
positional: vec![],
named: indexmap::IndexMap::new(),
},
})),
}
let mut input = ClassifiedInputStream::new();
@ -237,9 +252,30 @@ async fn process_line(readline: Result<String, ReadlineError>, ctx: &mut Context
))
}
(Some(ClassifiedCommand::Sink(_)), Some(_)) => {
return LineResult::Error(ShellError::string("Commands like table, save, and autoview must come last in the pipeline"))
}
(Some(ClassifiedCommand::Sink(left)), None) => {
let input_vec: Vec<Value> = input.objects.collect().await;
left.run(
ctx,
input_vec,
)?;
break;
}
(
Some(ClassifiedCommand::Internal(left)),
Some(ClassifiedCommand::Internal(_)),
Some(ClassifiedCommand::External(_)),
) => match left.run(ctx, input).await {
Ok(val) => ClassifiedInputStream::from_input_stream(val),
Err(err) => return LineResult::Error(err),
},
(
Some(ClassifiedCommand::Internal(left)),
Some(_),
) => match left.run(ctx, input).await {
Ok(val) => ClassifiedInputStream::from_input_stream(val),
Err(err) => return LineResult::Error(err),
@ -260,17 +296,9 @@ async fn process_line(readline: Result<String, ReadlineError>, ctx: &mut Context
Err(err) => return LineResult::Error(err),
},
(
Some(ClassifiedCommand::Internal(left)),
Some(ClassifiedCommand::External(_)),
) => match left.run(ctx, input).await {
Ok(val) => ClassifiedInputStream::from_input_stream(val),
Err(err) => return LineResult::Error(err),
},
(
Some(ClassifiedCommand::External(left)),
Some(ClassifiedCommand::Internal(_)),
Some(_),
) => match left.run(ctx, input, StreamNext::Internal).await {
Ok(val) => val,
Err(err) => return LineResult::Error(err),
@ -285,21 +313,6 @@ async fn process_line(readline: Result<String, ReadlineError>, ctx: &mut Context
}
}
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) => LineResult::Error(ShellError::string("CTRL-C")),
@ -365,17 +378,31 @@ fn classify_command(
args,
}))
}
false => {
let arg_list_strings: Vec<String> = match args {
Some(args) => args.iter().map(|i| i.as_external_arg()).collect(),
None => vec![],
};
false => match context.has_sink(&name.to_string()) {
true => {
let command = context.get_sink(&name.to_string());
let config = command.config();
let scope = Scope::empty();
Ok(ClassifiedCommand::External(ExternalCommand {
name: name.to_string(),
args: arg_list_strings,
}))
}
let args = match args {
Some(args) => config.evaluate_args(args.iter(), &scope)?,
None => Args::default(),
};
Ok(ClassifiedCommand::Sink(SinkCommand { command, args }))
}
false => {
let arg_list_strings: Vec<String> = match args {
Some(args) => args.iter().map(|i| i.as_external_arg()).collect(),
None => vec![],
};
Ok(ClassifiedCommand::External(ExternalCommand {
name: name.to_string(),
args: arg_list_strings,
}))
}
},
},
(_, None) => Err(ShellError::string(
@ -390,64 +417,3 @@ fn classify_command(
)))
}
}
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);
handle_unexpected(&mut *host, |host| crate::format::print_view(&view, host));
if last != i {
host.stdout("");
}
}
futures::future::ready(empty_stream())
})
.flatten_stream()
.boxed()
}
crate fn format_list(args: CommandArgs) -> Result<OutputStream, ShellError> {
let host = args.host.clone();
let view = EntriesListView::from_stream(args.input);
Ok(view
.then(move |view| {
handle_unexpected(&mut *host.lock().unwrap(), |host| {
crate::format::print_view(&view, host)
});
futures::future::ready(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
}

1
src/commands.rs
View file

@ -1,4 +1,5 @@
crate mod args;
crate mod autoview;
crate mod cd;
crate mod classified;
crate mod command;

13
src/commands/classified.rs
View file

@ -1,3 +1,4 @@
use crate::commands::command::Sink;
use crate::parser::ast::Expression;
use crate::parser::registry::Args;
use crate::prelude::*;
@ -79,9 +80,21 @@ crate enum ClassifiedCommand {
#[allow(unused)]
Expr(Expression),
Internal(InternalCommand),
Sink(SinkCommand),
External(ExternalCommand),
}
crate struct SinkCommand {
crate command: Arc<dyn Sink>,
crate args: Args,
}
impl SinkCommand {
crate fn run(self, context: &mut Context, input: Vec<Value>) -> Result<(), ShellError> {
context.run_sink(self.command, self.args, input)
}
}
crate struct InternalCommand {
crate command: Arc<dyn Command>,
crate args: Args,

60
src/commands/command.rs
View file

@ -2,6 +2,7 @@ use crate::errors::ShellError;
use crate::object::Value;
use crate::parser::CommandConfig;
use crate::prelude::*;
use core::future::Future;
use std::path::PathBuf;
pub struct CommandArgs {
@ -28,6 +29,28 @@ impl CommandArgs {
}
}
pub struct SinkCommandArgs {
pub ctx: Context,
pub positional: Vec<Value>,
pub named: indexmap::IndexMap<String, Value>,
pub input: Vec<Value>,
}
impl SinkCommandArgs {
crate fn from_context(
ctx: &'caller mut Context,
positional: Vec<Value>,
input: Vec<Value>,
) -> SinkCommandArgs {
SinkCommandArgs {
ctx: ctx.clone(),
positional,
named: indexmap::IndexMap::default(),
input,
}
}
}
#[derive(Debug)]
pub enum CommandAction {
ChangeCwd(PathBuf),
@ -60,6 +83,21 @@ pub trait Command {
}
}
pub trait Sink {
fn run(&self, args: SinkCommandArgs) -> Result<(), ShellError>;
fn name(&self) -> &str;
fn config(&self) -> CommandConfig {
CommandConfig {
name: self.name().to_string(),
mandatory_positional: vec![],
optional_positional: vec![],
rest_positional: true,
named: indexmap::IndexMap::new(),
}
}
}
pub struct FnCommand {
name: String,
func: fn(CommandArgs) -> Result<OutputStream, ShellError>,
@ -84,3 +122,25 @@ pub fn command(
func,
})
}
pub struct FnSink {
name: String,
func: fn(SinkCommandArgs) -> Result<(), ShellError>,
}
impl Sink for FnSink {
fn run(&self, args: SinkCommandArgs) -> Result<(), ShellError> {
(self.func)(args)
}
fn name(&self) -> &str {
&self.name
}
}
pub fn sink(name: &str, func: fn(SinkCommandArgs) -> Result<(), ShellError>) -> Arc<dyn Sink> {
Arc::new(FnSink {
name: name.to_string(),
func,
})
}

39
src/context.rs
View file

@ -1,3 +1,5 @@
use crate::commands::command::Sink;
use crate::commands::command::SinkCommandArgs;
use crate::parser::Args;
use crate::prelude::*;
@ -5,8 +7,10 @@ use indexmap::IndexMap;
use std::error::Error;
use std::sync::Arc;
#[derive(Clone)]
pub struct Context {
commands: IndexMap<String, Arc<dyn Command>>,
sinks: IndexMap<String, Arc<dyn Sink>>,
crate host: Arc<Mutex<dyn Host + Send>>,
crate env: Arc<Mutex<Environment>>,
}
@ -15,6 +19,7 @@ impl Context {
crate fn basic() -> Result<Context, Box<dyn Error>> {
Ok(Context {
commands: indexmap::IndexMap::new(),
sinks: indexmap::IndexMap::new(),
host: Arc::new(Mutex::new(crate::env::host::BasicHost)),
env: Arc::new(Mutex::new(Environment::basic()?)),
})
@ -26,6 +31,40 @@ impl Context {
}
}
pub fn add_sinks(&mut self, sinks: Vec<Arc<dyn Sink>>) {
for sink in sinks {
self.sinks.insert(sink.name().to_string(), sink);
}
}
pub fn clone_sinks(&self) -> indexmap::IndexMap<String, Arc<dyn Sink>> {
self.sinks.clone()
}
crate fn has_sink(&self, name: &str) -> bool {
self.sinks.contains_key(name)
}
crate fn get_sink(&self, name: &str) -> Arc<dyn Sink> {
self.sinks.get(name).unwrap().clone()
}
crate fn run_sink(
&mut self,
command: Arc<dyn Sink>,
args: Args,
input: Vec<Value>,
) -> Result<(), ShellError> {
let command_args = SinkCommandArgs {
ctx: self.clone(),
positional: args.positional,
named: args.named,
input,
};
command.run(command_args)
}
pub fn clone_commands(&self) -> indexmap::IndexMap<String, Arc<dyn Command>> {
self.commands.clone()
}

1
src/format.rs
View file

@ -7,6 +7,7 @@ use crate::prelude::*;
crate use entries::{EntriesListView, EntriesView};
crate use generic::GenericView;
crate use list::ListView;
crate use table::TableView;
crate trait RenderView {

2
src/format/generic.rs
View file

@ -1,4 +1,4 @@
use crate::format::{EntriesView, RenderView, TableView};
use crate::format::{EntriesView, ListView, RenderView, TableView};
use crate::object::Value;
use crate::prelude::*;
use derive_new::new;