forked from extern/nushell
71 lines
2.1 KiB
Rust
71 lines
2.1 KiB
Rust
use nu_engine::{eval_block, CallExt};
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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::{Category, Example, PipelineData, ShellError, Signature, SyntaxShape};
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/// Source a file for environment variables.
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#[derive(Clone)]
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pub struct Source;
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impl Command for Source {
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fn name(&self) -> &str {
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"source"
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}
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fn signature(&self) -> Signature {
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Signature::build("source")
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.required(
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"filename",
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SyntaxShape::Filepath,
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"the filepath to the script file to source",
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)
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.category(Category::Core)
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}
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fn usage(&self) -> &str {
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"Runs a script file in the current context."
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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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// Note: this hidden positional is the block_id that corresponded to the 0th position
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// it is put here by the parser
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let block_id: i64 = call.req(engine_state, stack, 1)?;
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let block = engine_state.get_block(block_id as usize).clone();
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eval_block(
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engine_state,
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stack,
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&block,
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input,
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call.redirect_stdout,
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call.redirect_stderr,
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)
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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: "Runs foo.nu in the current context",
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example: r#"source foo.nu"#,
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result: None,
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},
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Example {
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description: "Runs foo.nu in current context and call the command defined, suppose foo.nu has content: `def say-hi [] { echo 'Hi!' }`",
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example: r#"source ./foo.nu; say-hi"#,
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result: None,
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},
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Example {
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description: "Runs foo.nu in current context and call the `main` command automatically, suppose foo.nu has content: `def main [] { echo 'Hi!' }`",
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example: r#"source ./foo.nu"#,
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result: None,
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},
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]
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}
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}
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