nushell/crates/nu-cli/src/commands/autoview.rs
2020-03-23 09:55:30 +13:00

283 lines
12 KiB
Rust

use crate::commands::UnevaluatedCallInfo;
use crate::commands::WholeStreamCommand;
use crate::prelude::*;
use nu_errors::ShellError;
use nu_parser::{hir, hir::Expression, hir::Literal, hir::SpannedExpression};
use nu_protocol::{Primitive, ReturnSuccess, Signature, UntaggedValue, Value};
use std::sync::atomic::AtomicBool;
use std::sync::atomic::Ordering;
pub struct Autoview;
impl WholeStreamCommand for Autoview {
fn name(&self) -> &str {
"autoview"
}
fn signature(&self) -> Signature {
Signature::build("autoview")
}
fn usage(&self) -> &str {
"View the contents of the pipeline as a table or list."
}
fn run(
&self,
args: CommandArgs,
registry: &CommandRegistry,
) -> Result<OutputStream, ShellError> {
autoview(RunnableContext {
input: args.input,
commands: registry.clone(),
shell_manager: args.shell_manager,
host: args.host,
source: args.call_info.source,
ctrl_c: args.ctrl_c,
name: args.call_info.name_tag,
})
}
}
pub struct RunnableContextWithoutInput {
pub shell_manager: ShellManager,
pub host: Arc<parking_lot::Mutex<Box<dyn Host>>>,
pub source: Text,
pub ctrl_c: Arc<AtomicBool>,
pub commands: CommandRegistry,
pub name: Tag,
}
impl RunnableContextWithoutInput {
pub fn convert(context: RunnableContext) -> (InputStream, RunnableContextWithoutInput) {
let new_context = RunnableContextWithoutInput {
shell_manager: context.shell_manager,
host: context.host,
source: context.source,
ctrl_c: context.ctrl_c,
commands: context.commands,
name: context.name,
};
(context.input, new_context)
}
}
pub fn autoview(context: RunnableContext) -> Result<OutputStream, ShellError> {
let binary = context.get_command("binaryview");
let text = context.get_command("textview");
let table = context.get_command("table");
Ok(OutputStream::new(async_stream! {
let (mut input_stream, context) = RunnableContextWithoutInput::convert(context);
match input_stream.next().await {
Some(x) => {
match input_stream.next().await {
Some(y) => {
let ctrl_c = context.ctrl_c.clone();
let stream = async_stream! {
yield Ok(x);
yield Ok(y);
loop {
match input_stream.next().await {
Some(z) => {
if ctrl_c.load(Ordering::SeqCst) {
break;
}
yield Ok(z);
}
_ => break,
}
}
};
let stream = stream.to_input_stream();
if let Some(table) = table {
let command_args = create_default_command_args(&context).with_input(stream);
let result = table.run(command_args, &context.commands);
result.collect::<Vec<_>>().await;
}
}
_ => {
match x {
Value {
value: UntaggedValue::Primitive(Primitive::String(ref s)),
tag: Tag { anchor, span },
} if anchor.is_some() => {
if let Some(text) = text {
let mut stream = VecDeque::new();
stream.push_back(UntaggedValue::string(s).into_value(Tag { anchor, span }));
let command_args = create_default_command_args(&context).with_input(stream);
let result = text.run(command_args, &context.commands);
result.collect::<Vec<_>>().await;
} else {
out!("{}", s);
}
}
Value {
value: UntaggedValue::Primitive(Primitive::String(s)),
..
} => {
out!("{}", s);
}
Value {
value: UntaggedValue::Primitive(Primitive::Line(ref s)),
tag: Tag { anchor, span },
} if anchor.is_some() => {
if let Some(text) = text {
let mut stream = VecDeque::new();
stream.push_back(UntaggedValue::string(s).into_value(Tag { anchor, span }));
let command_args = create_default_command_args(&context).with_input(stream);
let result = text.run(command_args, &context.commands);
result.collect::<Vec<_>>().await;
} else {
out!("{}\n", s);
}
}
Value {
value: UntaggedValue::Primitive(Primitive::Line(s)),
..
} => {
out!("{}\n", s);
}
Value {
value: UntaggedValue::Primitive(Primitive::Path(s)),
..
} => {
out!("{}", s.display());
}
Value {
value: UntaggedValue::Primitive(Primitive::Int(n)),
..
} => {
out!("{}", n);
}
Value {
value: UntaggedValue::Primitive(Primitive::Decimal(n)),
..
} => {
out!("{}", n);
}
Value { value: UntaggedValue::Primitive(Primitive::Binary(ref b)), .. } => {
if let Some(binary) = binary {
let mut stream = VecDeque::new();
stream.push_back(x);
let command_args = create_default_command_args(&context).with_input(stream);
let result = binary.run(command_args, &context.commands);
result.collect::<Vec<_>>().await;
} else {
use pretty_hex::*;
out!("{:?}", b.hex_dump());
}
}
Value { value: UntaggedValue::Error(e), .. } => {
yield Err(e);
}
Value { value: UntaggedValue::Row(row), ..} => {
use prettytable::format::{FormatBuilder, LinePosition, LineSeparator};
use prettytable::{color, Attr, Cell, Row, Table};
use crate::data::value::{format_leaf, style_leaf};
enum TableMode {
Light,
Normal,
}
let mut table = Table::new();
let table_mode = crate::data::config::config(Tag::unknown());
let table_mode = if let Some(s) = table_mode?.get("table_mode") {
match s.as_string() {
Ok(typ) if typ == "light" => TableMode::Light,
_ => TableMode::Normal,
}
} else {
TableMode::Normal
};
match table_mode {
TableMode::Light => {
table.set_format(
FormatBuilder::new()
.separator(LinePosition::Title, LineSeparator::new('─', '─', ' ', ' '))
.padding(1, 1)
.build(),
);
}
_ => {
table.set_format(
FormatBuilder::new()
.column_separator('│')
.separator(LinePosition::Top, LineSeparator::new('─', '┬', ' ', ' '))
.separator(LinePosition::Title, LineSeparator::new('─', '┼', ' ', ' '))
.separator(LinePosition::Bottom, LineSeparator::new('─', '┴', ' ', ' '))
.padding(1, 1)
.build(),
);
}
}
for (key, value) in row.entries.iter() {
table.add_row(Row::new(vec![Cell::new(key).with_style(Attr::ForegroundColor(color::GREEN)).with_style(Attr::Bold),
Cell::new(&format_leaf(value).plain_string(100_000))]));
}
table.printstd();
// table.print_term(&mut *context.host.lock().out_terminal().ok_or_else(|| ShellError::untagged_runtime_error("Could not open terminal for output"))?)
// .map_err(|_| ShellError::untagged_runtime_error("Internal error: could not print to terminal (for unix systems check to make sure TERM is set)"))?;
}
Value { value: ref item, .. } => {
if let Some(table) = table {
let mut stream = VecDeque::new();
stream.push_back(x);
let command_args = create_default_command_args(&context).with_input(stream);
let result = table.run(command_args, &context.commands);
result.collect::<Vec<_>>().await;
} else {
out!("{:?}", item);
}
}
}
}
}
}
_ => {
//out!("<no results>");
}
}
// Needed for async_stream to type check
if false {
yield ReturnSuccess::value(UntaggedValue::nothing().into_untagged_value());
}
}))
}
fn create_default_command_args(context: &RunnableContextWithoutInput) -> RawCommandArgs {
let span = context.name.span;
RawCommandArgs {
host: context.host.clone(),
ctrl_c: context.ctrl_c.clone(),
shell_manager: context.shell_manager.clone(),
call_info: UnevaluatedCallInfo {
args: hir::Call {
head: Box::new(SpannedExpression::new(
Expression::Literal(Literal::String(span)),
span,
)),
positional: None,
named: None,
span,
},
source: context.source.clone(),
name_tag: context.name.clone(),
},
}
}