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Add updating cell paths

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This commit is contained in:
JT 2021-11-05 16:59:12 +13:00
parent 8c43f60e2e
commit 183d200b9f
6 changed files with 134 additions and 41 deletions
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70
crates/nu-command/src/conversions/into/int.rs
View file

@ -1,5 +1,6 @@
use nu_engine::CallExt;
use nu_protocol::{
ast::Call,
ast::{Call, CellPath},
engine::{Command, EngineState, Stack},
Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Value,
};
@ -27,33 +28,20 @@ impl Command for SubCommand {
fn run(
&self,
engine_state: &EngineState,
_stack: &mut Stack,
stack: &mut Stack,
call: &Call,
input: PipelineData,
) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
into_int(engine_state, call, input)
into_int(engine_state, stack, call, input)
}
fn examples(&self) -> Vec<Example> {
vec![
// Example {
// description: "Convert string to integer in table",
// example: "echo [[num]; ['-5'] [4] [1.5]] | into int num",
// result: Some(vec![
// UntaggedValue::row(indexmap! {
// "num".to_string() => UntaggedValue::int(-5).into(),
// })
// .into(),
// UntaggedValue::row(indexmap! {
// "num".to_string() => UntaggedValue::int(4).into(),
// })
// .into(),
// UntaggedValue::row(indexmap! {
// "num".to_string() => UntaggedValue::int(1).into(),
// })
// .into(),
// ]),
// },
Example {
description: "Convert string to integer in table",
example: "echo [[num]; ['-5'] [4] [1.5]] | into int num",
result: None,
},
Example {
description: "Convert string to integer",
example: "'2' | into int",
@ -91,46 +79,48 @@ impl Command for SubCommand {
fn into_int(
engine_state: &EngineState,
stack: &mut Stack,
call: &Call,
input: PipelineData,
) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
let head = call.head;
// let column_paths: Vec<CellPath> = call.rest(context, 0)?;
let column_paths: Vec<CellPath> = call.rest(engine_state, stack, 0)?;
input.map(
move |v| {
action(v, head)
// FIXME: Add back cell_path support
// if column_paths.is_empty() {
// action(&v, v.tag())
// } else {
// let mut ret = v;
// for path in &column_paths {
// ret = ret
// .swap_data_by_column_path(path, Box::new(move |old| action(old, old.tag())))?;
// }
if column_paths.is_empty() {
action(&v, head)
} else {
let mut ret = v;
for path in &column_paths {
let r =
ret.update_cell_path(&path.members, Box::new(move |old| action(old, head)));
if let Err(error) = r {
return Value::Error { error };
}
}
// Ok(ret)
// }
ret
}
},
engine_state.ctrlc.clone(),
)
}
pub fn action(input: Value, span: Span) -> Value {
pub fn action(input: &Value, span: Span) -> Value {
match input {
Value::Int { .. } => input,
Value::Filesize { val, .. } => Value::Int { val, span },
Value::Int { .. } => input.clone(),
Value::Filesize { val, .. } => Value::Int { val: *val, span },
Value::Float { val, .. } => Value::Int {
val: val as i64,
val: *val as i64,
span,
},
Value::String { val, .. } => match int_from_string(&val, span) {
Value::String { val, .. } => match int_from_string(val, span) {
Ok(val) => Value::Int { val, span },
Err(error) => Value::Error { error },
},
Value::Bool { val, .. } => {
if val {
if *val {
Value::Int { val: 1, span }
} else {
Value::Int { val: 0, span }

16
crates/nu-protocol/src/pipeline_data.rs
View file

@ -70,6 +70,22 @@ impl PipelineData {
}
}
pub fn update_cell_path(
&mut self,
cell_path: &[PathMember],
callback: Box<dyn FnOnce(&Value) -> Value>,
) -> Result<(), ShellError> {
match self {
// FIXME: there are probably better ways of doing this
PipelineData::Stream(stream) => Value::List {
vals: stream.collect(),
span: Span::unknown(),
}
.update_cell_path(cell_path, callback),
PipelineData::Value(v) => v.update_cell_path(cell_path, callback),
}
}
/// Simplified mapper to help with simple values also. For full iterator support use `.into_iter()` instead
pub fn map<F>(
self,

7
crates/nu-protocol/src/shell_error.rs
View file

@ -111,6 +111,13 @@ pub enum ShellError {
#[label = "value originates here"] Span,
),
#[error("Not a list value")]
#[diagnostic(code(nu::shell::not_a_list), url(docsrs))]
NotAList(
#[label = "value not a list"] Span,
#[label = "value originates here"] Span,
),
#[error("External command")]
#[diagnostic(code(nu::shell::external_command), url(docsrs))]
ExternalCommand(String, #[label("{0}")] Span),

72
crates/nu-protocol/src/value/mod.rs
View file

@ -312,6 +312,78 @@ impl Value {
Ok(current)
}
/// Follow a given column path into the value: for example accessing nth elements in a stream or list
pub fn update_cell_path(
&mut self,
cell_path: &[PathMember],
callback: Box<dyn FnOnce(&Value) -> Value>,
) -> Result<(), ShellError> {
let orig = self.clone();
let new_val = callback(&orig.follow_cell_path(cell_path)?);
match new_val {
Value::Error { error } => Err(error),
new_val => self.replace_data_at_cell_path(cell_path, new_val),
}
}
pub fn replace_data_at_cell_path(
&mut self,
cell_path: &[PathMember],
new_val: Value,
) -> Result<(), ShellError> {
match cell_path.first() {
Some(path_member) => match path_member {
PathMember::String {
val: col_name,
span,
} => match self {
Value::List { vals, .. } => {
for val in vals.iter_mut() {
match val {
Value::Record { cols, vals, .. } => {
for col in cols.iter().zip(vals) {
if col.0 == col_name {
col.1.replace_data_at_cell_path(
&cell_path[1..],
new_val.clone(),
)?
}
}
}
v => return Err(ShellError::CantFindColumn(*span, v.span()?)),
}
}
}
Value::Record { cols, vals, .. } => {
for col in cols.iter().zip(vals) {
if col.0 == col_name {
col.1
.replace_data_at_cell_path(&cell_path[1..], new_val.clone())?
}
}
}
v => return Err(ShellError::CantFindColumn(*span, v.span()?)),
},
PathMember::Int { val: row_num, span } => match self {
Value::List { vals, .. } => {
if let Some(v) = vals.get_mut(*row_num) {
v.replace_data_at_cell_path(&cell_path[1..], new_val)?
} else {
return Err(ShellError::AccessBeyondEnd(vals.len(), *span));
}
}
v => return Err(ShellError::NotAList(*span, v.span()?)),
},
},
None => {
*self = new_val;
}
}
Ok(())
}
pub fn is_true(&self) -> bool {
matches!(self, Value::Bool { val: true, .. })
}

2
crates/nu_plugin_inc/src/inc.rs
View file

@ -86,7 +86,7 @@ impl Inc {
match value {
Value::Int { val, span } => Ok(Value::Int {
val: val + 1,
span: span.clone(),
span: *span,
}),
Value::String { val, .. } => Ok(self.apply(val)),
_ => Err(PluginError::RunTimeError("incrementable value".to_string())),

8
src/tests.rs
View file

@ -831,3 +831,11 @@ fn shorthand_env_3() -> TestResult {
fn shorthand_env_4() -> TestResult {
fail_test(r#"FOO=BAZ FOO= $nu.env.FOO"#, "cannot find column")
}
#[test]
fn update_cell_path_1() -> TestResult {
run_test(
r#"[[name, size]; [a, 1.1]] | into int size | get size.0"#,
"1",
)
}