mirror of
https://github.com/nushell/nushell
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Port str downcase and str contains (#319)
* Port str contains command * Add another test case / example for str contains * Port str downcase to engine-q Co-authored-by: Stefan Stanciulescu <contact@stefanstanciulescu.com>
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4 changed files with 356 additions and 0 deletions
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@ -97,6 +97,8 @@ pub fn create_default_context() -> EngineState {
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StrCamelCase,
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StrCapitalize,
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StrCollect,
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StrContains,
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StrDowncase,
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StrKebabCase,
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StrPascalCase,
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StrScreamingSnakeCase,
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194
crates/nu-command/src/strings/str_/contains.rs
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194
crates/nu-command/src/strings/str_/contains.rs
Normal file
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@ -0,0 +1,194 @@
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use nu_engine::CallExt;
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use nu_protocol::ast::Call;
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use nu_protocol::ast::CellPath;
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use nu_protocol::engine::{Command, EngineState, Stack};
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use nu_protocol::{
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Example, PipelineData, ShellError, Signature, Span, Spanned, SyntaxShape, Value,
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};
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#[derive(Clone)]
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pub struct SubCommand;
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impl Command for SubCommand {
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fn name(&self) -> &str {
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"str contains"
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}
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fn signature(&self) -> Signature {
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Signature::build("str contains")
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.required("pattern", SyntaxShape::String, "the pattern to find")
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.rest(
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"rest",
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SyntaxShape::CellPath,
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"optionally check if string contains pattern by column paths",
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)
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.switch("insensitive", "search is case insensitive", Some('i'))
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}
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fn usage(&self) -> &str {
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"Checks if string contains pattern"
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}
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fn run(
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&self,
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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operate(engine_state, stack, call, input)
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}
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fn examples(&self) -> Vec<Example> {
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vec![
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Example {
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description: "Check if string contains pattern",
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example: "'my_library.rb' | str contains '.rb'",
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result: Some(Value::Bool {
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val: true,
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span: Span::unknown(),
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}),
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},
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Example {
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description: "Check if string contains pattern case insensitive",
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example: "'my_library.rb' | str contains -i '.RB'",
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result: Some(Value::Bool {
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val: true,
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span: Span::unknown(),
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}),
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},
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Example {
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description: "Check if string contains pattern in a table",
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example: " [[ColA ColB]; [test 100]] | str contains 'e' ColA",
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result: Some(Value::List {
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vals: vec![Value::Record {
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cols: vec!["ColA".to_string(), "ColB".to_string()],
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vals: vec![
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Value::Bool {
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val: true,
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span: Span::unknown(),
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},
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Value::test_int(100),
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],
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span: Span::unknown(),
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}],
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span: Span::unknown(),
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}),
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},
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Example {
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description: "Check if string contains pattern in a table",
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example: " [[ColA ColB]; [test 100]] | str contains -i 'E' ColA",
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result: Some(Value::List {
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vals: vec![Value::Record {
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cols: vec!["ColA".to_string(), "ColB".to_string()],
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vals: vec![
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Value::Bool {
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val: true,
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span: Span::unknown(),
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},
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Value::test_int(100),
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],
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span: Span::unknown(),
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}],
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span: Span::unknown(),
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}),
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},
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Example {
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description: "Check if string contains pattern in a table",
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example: " [[ColA ColB]; [test hello]] | str contains 'e' ColA ColB",
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result: Some(Value::List {
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vals: vec![Value::Record {
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cols: vec!["ColA".to_string(), "ColB".to_string()],
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vals: vec![
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Value::Bool {
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val: true,
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span: Span::unknown(),
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},
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Value::Bool {
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val: true,
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span: Span::unknown(),
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},
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],
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span: Span::unknown(),
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}],
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span: Span::unknown(),
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}),
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},
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Example {
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description: "Check if string contains pattern",
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example: "'hello' | str contains 'banana'",
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result: Some(Value::Bool {
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val: false,
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span: Span::unknown(),
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}),
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},
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]
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}
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}
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fn operate(
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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let head = call.head;
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let pattern: Spanned<String> = call.req(engine_state, stack, 0)?;
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let column_paths: Vec<CellPath> = call.rest(engine_state, stack, 1)?;
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let case_insensitive = call.has_flag("insensitive");
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input.map(
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move |v| {
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if column_paths.is_empty() {
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action(&v, case_insensitive, &pattern.item, head)
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} else {
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let mut ret = v;
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for path in &column_paths {
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let p = pattern.item.clone();
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let r = ret.update_cell_path(
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&path.members,
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Box::new(move |old| action(old, case_insensitive, &p, head)),
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);
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if let Err(error) = r {
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return Value::Error { error };
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}
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}
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ret
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}
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},
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engine_state.ctrlc.clone(),
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)
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}
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fn action(input: &Value, case_insensitive: bool, pattern: &str, head: Span) -> Value {
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match input {
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Value::String { val, .. } => Value::Bool {
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val: match case_insensitive {
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true => val.to_lowercase().contains(pattern.to_lowercase().as_str()),
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false => val.contains(pattern),
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},
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span: head,
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},
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other => Value::Error {
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error: ShellError::UnsupportedInput(
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format!(
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"Input's type is {}. This command only works with strings.",
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other.get_type()
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),
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Span::unknown(),
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),
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},
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}
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}
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#[cfg(test)]
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mod test {
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use super::*;
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#[test]
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fn test_examples() {
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use crate::test_examples;
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test_examples(SubCommand {})
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}
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}
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156
crates/nu-command/src/strings/str_/downcase.rs
Normal file
156
crates/nu-command/src/strings/str_/downcase.rs
Normal file
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@ -0,0 +1,156 @@
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use nu_engine::CallExt;
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use nu_protocol::ast::Call;
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use nu_protocol::ast::CellPath;
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use nu_protocol::engine::{Command, EngineState, Stack};
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use nu_protocol::{Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Value};
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#[derive(Clone)]
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pub struct SubCommand;
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impl Command for SubCommand {
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fn name(&self) -> &str {
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"str downcase"
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}
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fn signature(&self) -> Signature {
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Signature::build("str downcase").rest(
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"rest",
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SyntaxShape::CellPath,
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"optionally downcase text by column paths",
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)
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}
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fn usage(&self) -> &str {
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"downcases text"
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}
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fn run(
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&self,
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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operate(engine_state, stack, call, input)
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}
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fn examples(&self) -> Vec<Example> {
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vec![
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Example {
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description: "Downcase contents",
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example: "'NU' | str downcase",
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result: Some(Value::String {
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val: "nu".to_string(),
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span: Span::unknown(),
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}),
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},
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Example {
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description: "Downcase contents",
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example: "'TESTa' | str downcase",
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result: Some(Value::String {
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val: "testa".to_string(),
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span: Span::unknown(),
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}),
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},
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Example {
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description: "Downcase contents",
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example: "[[ColA ColB]; [Test ABC]] | str downcase ColA",
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result: Some(Value::List {
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vals: vec![Value::Record {
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cols: vec!["ColA".to_string(), "ColB".to_string()],
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vals: vec![
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Value::String {
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val: "test".to_string(),
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span: Span::unknown(),
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},
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Value::String {
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val: "ABC".to_string(),
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span: Span::unknown(),
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},
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],
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span: Span::unknown(),
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}],
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span: Span::unknown(),
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}),
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},
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Example {
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description: "Downcase contents",
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example: "[[ColA ColB]; [Test ABC]] | str downcase ColA ColB",
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result: Some(Value::List {
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vals: vec![Value::Record {
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cols: vec!["ColA".to_string(), "ColB".to_string()],
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vals: vec![
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Value::String {
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val: "test".to_string(),
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span: Span::unknown(),
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},
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Value::String {
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val: "abc".to_string(),
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span: Span::unknown(),
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},
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],
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span: Span::unknown(),
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}],
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span: Span::unknown(),
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}),
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},
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]
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}
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}
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fn operate(
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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let head = call.head;
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let column_paths: Vec<CellPath> = call.rest(engine_state, stack, 0)?;
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input.map(
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move |v| {
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if column_paths.is_empty() {
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action(&v, head)
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} else {
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let mut ret = v;
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for path in &column_paths {
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let r =
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ret.update_cell_path(&path.members, Box::new(move |old| action(old, head)));
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if let Err(error) = r {
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return Value::Error { error };
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}
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}
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ret
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}
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},
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engine_state.ctrlc.clone(),
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)
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}
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fn action(input: &Value, head: Span) -> Value {
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match input {
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Value::String { val, .. } => Value::String {
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val: val.to_ascii_lowercase(),
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span: head,
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},
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other => Value::Error {
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error: ShellError::UnsupportedInput(
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format!(
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"Input's type is {}. This command only works with strings.",
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other.get_type()
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),
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Span::unknown(),
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),
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},
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}
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}
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#[cfg(test)]
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mod test {
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use super::*;
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#[test]
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fn test_examples() {
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use crate::test_examples;
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test_examples(SubCommand {})
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}
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}
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@ -1,7 +1,11 @@
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mod capitalize;
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mod case;
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mod collect;
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mod contains;
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mod downcase;
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pub use capitalize::SubCommand as StrCapitalize;
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pub use case::*;
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pub use collect::*;
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pub use contains::SubCommand as StrContains;
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pub use downcase::SubCommand as StrDowncase;
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