e72cecf457
`echo` tends to confuse new Nu users; they expect it to work like `print` when it just passes a value to the next stage of the pipeline. We haven't quite figured out what to do about `echo` in the long run, but I think a good start is to remove `echo` from command examples where it would be unnecessary and arguably unidiomatic.
88 lines
2.5 KiB
Rust
88 lines
2.5 KiB
Rust
use super::base64::{operate, ActionType, CHARACTER_SET_DESC};
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use nu_protocol::ast::Call;
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use nu_protocol::engine::{Command, EngineState, Stack};
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use nu_protocol::{
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Category, Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value,
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};
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#[derive(Clone)]
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pub struct DecodeBase64;
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impl Command for DecodeBase64 {
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fn name(&self) -> &str {
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"decode base64"
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}
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fn signature(&self) -> Signature {
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Signature::build("decode base64")
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.input_output_types(vec![
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(Type::String, Type::String),
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(Type::String, Type::Binary),
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])
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.vectorizes_over_list(true)
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.named(
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"character-set",
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SyntaxShape::String,
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CHARACTER_SET_DESC,
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Some('c'),
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)
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.switch(
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"binary",
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"Output a binary value instead of decoding payload as UTF-8",
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Some('b'),
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)
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.rest(
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"rest",
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SyntaxShape::CellPath,
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"For a data structure input, decode data at the given cell paths",
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)
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.category(Category::Hash)
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}
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fn usage(&self) -> &str {
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"Base64 decode a value"
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}
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fn extra_usage(&self) -> &str {
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r#"Will attempt to decode binary payload as an UTF-8 string by default. Use the `--binary(-b)` argument to force binary output."#
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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: "Base64 decode a value and output as UTF-8 string",
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example: "'U29tZSBEYXRh' | decode base64",
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result: Some(Value::string("Some Data", Span::test_data())),
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},
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Example {
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description: "Base64 decode a value and output as binary",
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example: "'U29tZSBEYXRh' | decode base64 --binary",
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result: Some(Value::binary(
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[0x53, 0x6f, 0x6d, 0x65, 0x20, 0x44, 0x61, 0x74, 0x61],
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Span::test_data(),
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)),
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},
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]
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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(ActionType::Decode, engine_state, stack, call, input)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_examples() {
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crate::test_examples(DecodeBase64)
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}
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}
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