<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `src/lib/scriptengine/shebang_script.rs`."><title>shebang_script.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-c579a84d.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="cli" data-themes="" data-resource-suffix="" data-rustdoc-version="1.86.0-nightly (6067b3631 2025-01-17)" data-channel="nightly" data-search-js="search-ccb196c1.js" data-settings-js="settings-0f613d39.js" ><script src="../../../static.files/storage-59e33391.js"></script><script defer src="../../../static.files/src-script-56102188.js"></script><script defer src="../../../src-files.js"></script><script defer src="../../../static.files/main-5f194d8c.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-893ab5e7.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-6580c154.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer"></div><main><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">cli/scriptengine/</div>shebang_script.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap"><div data-nosnippet><pre class="src-line-numbers">
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//!
//! Runs scripts using the executable defined in the shebang line.
//!
</span><span class="attr">#[cfg(test)]
#[path = <span class="string">"shebang_script_test.rs"</span>]
</span><span class="kw">mod </span>shebang_script_test;
<span class="kw">use </span><span class="kw">crate</span>::error::CargoMakeError;
<span class="kw">use </span><span class="kw">crate</span>::scriptengine::generic_script;
<span class="kw">use </span>std::path::Path;
<span class="attr">#[cfg(target_os = <span class="string">"windows"</span>)]
</span><span class="kw">const </span>DEFAULT_EXTENSION: <span class="kw-2">&</span><span class="lifetime">'static </span>str = <span class="string">"cmd.exe"</span>;
<span class="attr">#[cfg(not(target_os = <span class="string">"windows"</span>))]
</span><span class="kw">const </span>DEFAULT_EXTENSION: <span class="kw-2">&</span><span class="lifetime">'static </span>str = <span class="string">"sh"</span>;
<span class="attr">#[derive(Debug, Clone)]
</span><span class="doccomment">/// Holds flow information
</span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>Shebang {
<span class="doccomment">/// The script runner
</span><span class="kw">pub</span>(<span class="kw">crate</span>) runner: <span class="prelude-ty">Option</span><String>,
<span class="doccomment">/// additional arguments
</span><span class="kw">pub</span>(<span class="kw">crate</span>) arguments: <span class="prelude-ty">Option</span><Vec<String>>,
}
<span class="kw">impl </span>Shebang {
<span class="doccomment">/// Creates and returns a new instance.
</span><span class="kw">fn </span>new() -> Shebang {
Shebang {
runner: <span class="prelude-val">None</span>,
arguments: <span class="prelude-val">None</span>,
}
}
}
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>get_shebang(script_text: <span class="kw-2">&</span>Vec<String>) -> Shebang {
<span class="kw">match </span>script_text.first() {
<span class="prelude-val">Some</span>(line) => {
<span class="kw">let </span>trimmed_line = line.trim();
<span class="kw">if </span>trimmed_line.starts_with(<span class="string">"#!"</span>) {
<span class="kw">let </span><span class="kw-2">mut </span>lines = trimmed_line.split(<span class="string">"\n"</span>);
<span class="kw">match </span>lines.next() {
<span class="prelude-val">Some</span>(first_line) => {
<span class="kw">let </span><span class="kw-2">mut </span>shebang_line = first_line.replace(<span class="string">"#!"</span>, <span class="string">""</span>);
shebang_line = shebang_line.trim().to_string();
<span class="kw">if </span>!shebang_line.is_empty() {
<span class="kw">let </span><span class="kw-2">mut </span>values = shebang_line.split_whitespace();
<span class="kw">let </span>runner = <span class="kw">match </span>values.next() {
<span class="prelude-val">Some</span>(value) => <span class="prelude-val">Some</span>(value.trim().to_string()),
<span class="kw">_ </span>=> <span class="prelude-val">None</span>,
};
<span class="kw">let </span><span class="kw-2">mut </span>argument_values = <span class="macro">vec!</span>[];
<span class="kw">for </span>arg <span class="kw">in </span>values {
argument_values.push(arg.trim().to_string());
}
<span class="kw">let </span>arguments = <span class="kw">if </span>!argument_values.is_empty() {
<span class="prelude-val">Some</span>(argument_values)
} <span class="kw">else </span>{
<span class="prelude-val">None
</span>};
Shebang { runner, arguments }
} <span class="kw">else </span>{
Shebang::new()
}
}
<span class="kw">_ </span>=> Shebang::new(),
}
} <span class="kw">else </span>{
Shebang::new()
}
}
<span class="prelude-val">None </span>=> Shebang::new(),
}
}
<span class="kw">fn </span>get_extension_for_runner(runner: <span class="kw-2">&</span>str) -> String {
<span class="kw">let </span>runner_no_extension = <span class="kw">match </span>Path::new(runner).file_stem() {
<span class="prelude-val">Some</span>(value) => value,
<span class="prelude-val">None </span>=> <span class="kw">return </span>DEFAULT_EXTENSION.to_string(),
};
<span class="kw">let </span>extension = <span class="kw">if </span>runner_no_extension == <span class="string">"python" </span>{
<span class="string">"py"
</span>} <span class="kw">else if </span>runner_no_extension == <span class="string">"perl" </span>{
<span class="string">"pl"
</span>} <span class="kw">else if </span>runner_no_extension == <span class="string">"node" </span>{
<span class="string">"js"
</span>} <span class="kw">else if </span>runner_no_extension == <span class="string">"powershell" </span>|| runner_no_extension == <span class="string">"pwsh" </span>{
<span class="string">"ps1"
</span>} <span class="kw">else </span>{
DEFAULT_EXTENSION
};
extension.to_string()
}
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>execute(
script_text: <span class="kw-2">&</span>Vec<String>,
extension: <span class="kw-2">&</span><span class="prelude-ty">Option</span><String>,
cli_arguments: <span class="kw-2">&</span>Vec<String>,
validate: bool,
) -> <span class="prelude-ty">Result</span><bool, CargoMakeError> {
<span class="kw">let </span>shebang = get_shebang(<span class="kw-2">&</span>script_text);
<span class="kw">match </span>shebang.runner {
<span class="prelude-val">Some</span>(runner) => {
<span class="kw">let </span>extension_str = <span class="kw">match </span>extension {
<span class="prelude-val">Some</span>(value) => value.to_string(),
<span class="prelude-val">None </span>=> get_extension_for_runner(<span class="kw-2">&</span>runner),
};
generic_script::execute(
<span class="kw-2">&</span>script_text,
runner,
extension_str,
shebang.arguments,
<span class="kw-2">&</span>cli_arguments,
validate,
)
}
<span class="prelude-val">None </span>=> {
<span class="kw">if </span>validate {
<span class="macro">error!</span>(<span class="string">"Unable to execute script using shebang."</span>);
}
<span class="prelude-val">Ok</span>(<span class="bool-val">false</span>)
}
}
}
</code></pre></div></section></main></body></html>