use shell_command_parser::extract_commands;use std::path::{Path, PathBuf};use url::Url; /// Normalize path separators to forward slashes for consistent cross-platform patterns.fn normalize_separators(path_str: &str) -> String { path_str.replace('\\', "/")} /// Returns true if the token looks like a command name or subcommand — i.e. it/// contains only alphanumeric characters, hyphens, and underscores, and does not/// start with a hyphen (which would make it a flag).fn is_plain_command_token(token: &str) -> bool { !token.starts_with('-') && token .chars() .all(|c| c.is_alphanumeric() || c == '-' || c == '_')} struct CommandPrefix { command: String, subcommand: Option<String>,} /// Extracts the command name and optional subcommand from a shell command using/// the shell parser.////// This parses the command properly to extract the command name and optional/// subcommand (e.g. "cargo" and "test" from "cargo test -p search"), handling shell/// syntax correctly. Returns `None` if parsing fails or if the command name/// contains path separators (for security reasons).fn extract_command_prefix(command: &str) -> Option<CommandPrefix> { let commands = extract_commands(command)?; let first_command = commands.first()?; let mut tokens = first_command.split_whitespace(); let first_token = tokens.next()?; // Only allow alphanumeric commands with hyphens/underscores. // Reject paths like "./script.sh" or "/usr/bin/python" to prevent // users from accidentally allowing arbitrary script execution. if !is_plain_command_token(first_token) { return None; } // Include the subcommand (second non-flag token) when present, to produce // more specific patterns like "cargo test" instead of just "cargo". let subcommand = tokens .next() .filter(|second_token| is_plain_command_token(second_token)) .map(|second_token| second_token.to_string()); Some(CommandPrefix { command: first_token.to_string(), subcommand, })} /// Extracts a regex pattern from a terminal command based on the first token (command name).////// Returns `None` for commands starting with `./`, `/`, or other path-like prefixes./// This is a deliberate security decision: we only allow pattern-based "always allow"/// rules for well-known command names (like `cargo`, `npm`, `git`), not for arbitrary/// scripts or absolute paths which could be manipulated by an attacker.pub fn extract_terminal_pattern(command: &str) -> Option<String> { let prefix = extract_command_prefix(command)?; let escaped_command = regex::escape(&prefix.command); Some(match &prefix.subcommand { Some(subcommand) => { format!( "^{}\\s+{}(\\s|$)", escaped_command, regex::escape(subcommand) ) } None => format!("^{}\\b", escaped_command), })} pub fn extract_terminal_pattern_display(command: &str) -> Option<String> { let prefix = extract_command_prefix(command)?; match prefix.subcommand { Some(subcommand) => Some(format!("{} {}", prefix.command, subcommand)), None => Some(prefix.command), }} pub fn extract_path_pattern(path: &str) -> Option<String> { let parent = Path::new(path).parent()?; let parent_str = normalize_separators(parent.to_str()?); if parent_str.is_empty() || parent_str == "/" { return None; } Some(format!("^{}/", regex::escape(&parent_str)))} pub fn extract_path_pattern_display(path: &str) -> Option<String> { let parent = Path::new(path).parent()?; let parent_str = normalize_separators(parent.to_str()?); if parent_str.is_empty() || parent_str == "/" { return None; } Some(format!("{}/", parent_str))} fn common_parent_dir(path_a: &str, path_b: &str) -> Option<PathBuf> { let parent_a = Path::new(path_a).parent()?; let parent_b = Path::new(path_b).parent()?; let components_a: Vec<_> = parent_a.components().collect(); let components_b: Vec<_> = parent_b.components().collect(); let common_count = components_a .iter() .zip(components_b.iter()) .take_while(|(a, b)| a == b) .count(); if common_count == 0 { return None; } let common: PathBuf = components_a[..common_count].iter().collect(); Some(common)} pub fn extract_copy_move_pattern(input: &str) -> Option<String> { let (source, dest) = input.split_once('\n')?; let common = common_parent_dir(source, dest)?; let common_str = normalize_separators(common.to_str()?); if common_str.is_empty() || common_str == "/" { return None; } Some(format!("^{}/", regex::escape(&common_str)))} pub fn extract_copy_move_pattern_display(input: &str) -> Option<String> { let (source, dest) = input.split_once('\n')?; let common = common_parent_dir(source, dest)?; let common_str = normalize_separators(common.to_str()?); if common_str.is_empty() || common_str == "/" { return None; } Some(format!("{}/", common_str))} pub fn extract_url_pattern(url: &str) -> Option<String> { let parsed = Url::parse(url).ok()?; let domain = parsed.host_str()?; Some(format!("^https?://{}", regex::escape(domain)))} pub fn extract_url_pattern_display(url: &str) -> Option<String> { let parsed = Url::parse(url).ok()?; let domain = parsed.host_str()?; Some(domain.to_string())} #[cfg(test)]mod tests { use super::*; #[test] fn test_extract_terminal_pattern() { assert_eq!( extract_terminal_pattern("cargo build --release"), Some("^cargo\\s+build(\\s|$)".to_string()) ); assert_eq!( extract_terminal_pattern("cargo test -p search"), Some("^cargo\\s+test(\\s|$)".to_string()) ); assert_eq!( extract_terminal_pattern("npm install"), Some("^npm\\s+install(\\s|$)".to_string()) ); assert_eq!( extract_terminal_pattern("git-lfs pull"), Some("^git\\-lfs\\s+pull(\\s|$)".to_string()) ); assert_eq!( extract_terminal_pattern("my_script arg"), Some("^my_script\\s+arg(\\s|$)".to_string()) ); // Flags as second token: only the command name is used assert_eq!( extract_terminal_pattern("ls -la"), Some("^ls\\b".to_string()) ); assert_eq!( extract_terminal_pattern("rm --force foo"), Some("^rm\\b".to_string()) ); // Single-word commands assert_eq!(extract_terminal_pattern("ls"), Some("^ls\\b".to_string())); // Subcommand pattern does not match a hyphenated extension of the subcommand // (e.g. approving "cargo build" should not approve "cargo build-foo") assert_eq!( extract_terminal_pattern("cargo build"), Some("^cargo\\s+build(\\s|$)".to_string()) ); let pattern = regex::Regex::new(&extract_terminal_pattern("cargo build").unwrap()).unwrap(); assert!(pattern.is_match("cargo build --release")); assert!(pattern.is_match("cargo build")); assert!(!pattern.is_match("cargo build-foo")); assert!(!pattern.is_match("cargo builder")); // Path-like commands are rejected assert_eq!(extract_terminal_pattern("./script.sh arg"), None); assert_eq!(extract_terminal_pattern("/usr/bin/python arg"), None); } #[test] fn test_extract_terminal_pattern_display() { assert_eq!( extract_terminal_pattern_display("cargo build --release"), Some("cargo build".to_string()) ); assert_eq!( extract_terminal_pattern_display("cargo test -p search"), Some("cargo test".to_string()) ); assert_eq!( extract_terminal_pattern_display("npm install"), Some("npm install".to_string()) ); assert_eq!( extract_terminal_pattern_display("ls -la"), Some("ls".to_string()) ); assert_eq!( extract_terminal_pattern_display("ls"), Some("ls".to_string()) ); } #[test] fn test_extract_path_pattern() { assert_eq!( extract_path_pattern("/Users/alice/project/src/main.rs"), Some("^/Users/alice/project/src/".to_string()) ); assert_eq!( extract_path_pattern("src/lib.rs"), Some("^src/".to_string()) ); assert_eq!(extract_path_pattern("file.txt"), None); assert_eq!(extract_path_pattern("/file.txt"), None); } #[test] fn test_extract_path_pattern_display() { assert_eq!( extract_path_pattern_display("/Users/alice/project/src/main.rs"), Some("/Users/alice/project/src/".to_string()) ); assert_eq!( extract_path_pattern_display("src/lib.rs"), Some("src/".to_string()) ); } #[test] fn test_extract_url_pattern() { assert_eq!( extract_url_pattern("https://github.com/user/repo"), Some("^https?://github\\.com".to_string()) ); assert_eq!( extract_url_pattern("http://example.com/path?query=1"), Some("^https?://example\\.com".to_string()) ); assert_eq!(extract_url_pattern("not a url"), None); } #[test] fn test_extract_url_pattern_display() { assert_eq!( extract_url_pattern_display("https://github.com/user/repo"), Some("github.com".to_string()) ); assert_eq!( extract_url_pattern_display("http://api.example.com/v1/users"), Some("api.example.com".to_string()) ); } #[test] fn test_special_chars_are_escaped() { assert_eq!( extract_path_pattern("/path/with (parens)/file.txt"), Some("^/path/with \\(parens\\)/".to_string()) ); assert_eq!( extract_url_pattern("https://test.example.com/path"), Some("^https?://test\\.example\\.com".to_string()) ); } #[test] fn test_extract_copy_move_pattern_same_directory() { assert_eq!( extract_copy_move_pattern( "/Users/alice/project/src/old.rs\n/Users/alice/project/src/new.rs" ), Some("^/Users/alice/project/src/".to_string()) ); } #[test] fn test_extract_copy_move_pattern_sibling_directories() { assert_eq!( extract_copy_move_pattern( "/Users/alice/project/src/old.rs\n/Users/alice/project/dst/new.rs" ), Some("^/Users/alice/project/".to_string()) ); } #[test] fn test_extract_copy_move_pattern_no_common_prefix() { assert_eq!( extract_copy_move_pattern("/home/file.txt\n/tmp/file.txt"), None ); } #[test] fn test_extract_copy_move_pattern_relative_paths() { assert_eq!( extract_copy_move_pattern("src/old.rs\nsrc/new.rs"), Some("^src/".to_string()) ); } #[test] fn test_extract_copy_move_pattern_display() { assert_eq!( extract_copy_move_pattern_display( "/Users/alice/project/src/old.rs\n/Users/alice/project/dst/new.rs" ), Some("/Users/alice/project/".to_string()) ); } #[test] fn test_extract_copy_move_pattern_no_arrow() { assert_eq!(extract_copy_move_pattern("just/a/path.rs"), None); assert_eq!(extract_copy_move_pattern_display("just/a/path.rs"), None); }}
use shell_command_parser::extract_commands;
use std::path::{Path, PathBuf};
use url::Url;
/// Normalize path separators to forward slashes for consistent cross-platform patterns.
fn normalize_separators(path_str: &str) -> String {
path_str.replace('\\', "/")
}
/// Returns true if the token looks like a command name or subcommand — i.e. it
/// contains only alphanumeric characters, hyphens, and underscores, and does not
/// start with a hyphen (which would make it a flag).
fn is_plain_command_token(token: &str) -> bool {
!token.starts_with('-')
&& token
.chars()
.all(|c| c.is_alphanumeric() || c == '-' || c == '_')
}
struct CommandPrefix {
command: String,
subcommand: Option<String>,
}
/// Extracts the command name and optional subcommand from a shell command using
/// the shell parser.
///
/// This parses the command properly to extract the command name and optional
/// subcommand (e.g. "cargo" and "test" from "cargo test -p search"), handling shell
/// syntax correctly. Returns `None` if parsing fails or if the command name
/// contains path separators (for security reasons).
fn extract_command_prefix(command: &str) -> Option<CommandPrefix> {
let commands = extract_commands(command)?;
let first_command = commands.first()?;
let mut tokens = first_command.split_whitespace();
let first_token = tokens.next()?;
// Only allow alphanumeric commands with hyphens/underscores.
// Reject paths like "./script.sh" or "/usr/bin/python" to prevent
// users from accidentally allowing arbitrary script execution.
if !is_plain_command_token(first_token) {
return None;
}
// Include the subcommand (second non-flag token) when present, to produce
// more specific patterns like "cargo test" instead of just "cargo".
let subcommand = tokens
.next()
.filter(|second_token| is_plain_command_token(second_token))
.map(|second_token| second_token.to_string());
Some(CommandPrefix {
command: first_token.to_string(),
subcommand,
})
}
/// Extracts a regex pattern from a terminal command based on the first token (command name).
///
/// Returns `None` for commands starting with `./`, `/`, or other path-like prefixes.
/// This is a deliberate security decision: we only allow pattern-based "always allow"
/// rules for well-known command names (like `cargo`, `npm`, `git`), not for arbitrary
/// scripts or absolute paths which could be manipulated by an attacker.
pub fn extract_terminal_pattern(command: &str) -> Option<String> {
let prefix = extract_command_prefix(command)?;
let escaped_command = regex::escape(&prefix.command);
Some(match &prefix.subcommand {
Some(subcommand) => {
format!(
"^{}\\s+{}(\\s|$)",
escaped_command,
regex::escape(subcommand)
)
}
None => format!("^{}\\b", escaped_command),
})
}
pub fn extract_terminal_pattern_display(command: &str) -> Option<String> {
let prefix = extract_command_prefix(command)?;
match prefix.subcommand {
Some(subcommand) => Some(format!("{} {}", prefix.command, subcommand)),
None => Some(prefix.command),
}
}
pub fn extract_path_pattern(path: &str) -> Option<String> {
let parent = Path::new(path).parent()?;
let parent_str = normalize_separators(parent.to_str()?);
if parent_str.is_empty() || parent_str == "/" {
return None;
}
Some(format!("^{}/", regex::escape(&parent_str)))
}
pub fn extract_path_pattern_display(path: &str) -> Option<String> {
let parent = Path::new(path).parent()?;
let parent_str = normalize_separators(parent.to_str()?);
if parent_str.is_empty() || parent_str == "/" {
return None;
}
Some(format!("{}/", parent_str))
}
fn common_parent_dir(path_a: &str, path_b: &str) -> Option<PathBuf> {
let parent_a = Path::new(path_a).parent()?;
let parent_b = Path::new(path_b).parent()?;
let components_a: Vec<_> = parent_a.components().collect();
let components_b: Vec<_> = parent_b.components().collect();
let common_count = components_a
.iter()
.zip(components_b.iter())
.take_while(|(a, b)| a == b)
.count();
if common_count == 0 {
return None;
}
let common: PathBuf = components_a[..common_count].iter().collect();
Some(common)
}
pub fn extract_copy_move_pattern(input: &str) -> Option<String> {
let (source, dest) = input.split_once('\n')?;
let common = common_parent_dir(source, dest)?;
let common_str = normalize_separators(common.to_str()?);
if common_str.is_empty() || common_str == "/" {
return None;
}
Some(format!("^{}/", regex::escape(&common_str)))
}
pub fn extract_copy_move_pattern_display(input: &str) -> Option<String> {
let (source, dest) = input.split_once('\n')?;
let common = common_parent_dir(source, dest)?;
let common_str = normalize_separators(common.to_str()?);
if common_str.is_empty() || common_str == "/" {
return None;
}
Some(format!("{}/", common_str))
}
pub fn extract_url_pattern(url: &str) -> Option<String> {
let parsed = Url::parse(url).ok()?;
let domain = parsed.host_str()?;
Some(format!("^https?://{}", regex::escape(domain)))
}
pub fn extract_url_pattern_display(url: &str) -> Option<String> {
let parsed = Url::parse(url).ok()?;
let domain = parsed.host_str()?;
Some(domain.to_string())
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_extract_terminal_pattern() {
assert_eq!(
extract_terminal_pattern("cargo build --release"),
Some("^cargo\\s+build(\\s|$)".to_string())
);
assert_eq!(
extract_terminal_pattern("cargo test -p search"),
Some("^cargo\\s+test(\\s|$)".to_string())
);
assert_eq!(
extract_terminal_pattern("npm install"),
Some("^npm\\s+install(\\s|$)".to_string())
);
assert_eq!(
extract_terminal_pattern("git-lfs pull"),
Some("^git\\-lfs\\s+pull(\\s|$)".to_string())
);
assert_eq!(
extract_terminal_pattern("my_script arg"),
Some("^my_script\\s+arg(\\s|$)".to_string())
);
// Flags as second token: only the command name is used
assert_eq!(
extract_terminal_pattern("ls -la"),
Some("^ls\\b".to_string())
);
assert_eq!(
extract_terminal_pattern("rm --force foo"),
Some("^rm\\b".to_string())
);
// Single-word commands
assert_eq!(extract_terminal_pattern("ls"), Some("^ls\\b".to_string()));
// Subcommand pattern does not match a hyphenated extension of the subcommand
// (e.g. approving "cargo build" should not approve "cargo build-foo")
assert_eq!(
extract_terminal_pattern("cargo build"),
Some("^cargo\\s+build(\\s|$)".to_string())
);
let pattern = regex::Regex::new(&extract_terminal_pattern("cargo build").unwrap()).unwrap();
assert!(pattern.is_match("cargo build --release"));
assert!(pattern.is_match("cargo build"));
assert!(!pattern.is_match("cargo build-foo"));
assert!(!pattern.is_match("cargo builder"));
// Path-like commands are rejected
assert_eq!(extract_terminal_pattern("./script.sh arg"), None);
assert_eq!(extract_terminal_pattern("/usr/bin/python arg"), None);
}
#[test]
fn test_extract_terminal_pattern_display() {
assert_eq!(
extract_terminal_pattern_display("cargo build --release"),
Some("cargo build".to_string())
);
assert_eq!(
extract_terminal_pattern_display("cargo test -p search"),
Some("cargo test".to_string())
);
assert_eq!(
extract_terminal_pattern_display("npm install"),
Some("npm install".to_string())
);
assert_eq!(
extract_terminal_pattern_display("ls -la"),
Some("ls".to_string())
);
assert_eq!(
extract_terminal_pattern_display("ls"),
Some("ls".to_string())
);
}
#[test]
fn test_extract_path_pattern() {
assert_eq!(
extract_path_pattern("/Users/alice/project/src/main.rs"),
Some("^/Users/alice/project/src/".to_string())
);
assert_eq!(
extract_path_pattern("src/lib.rs"),
Some("^src/".to_string())
);
assert_eq!(extract_path_pattern("file.txt"), None);
assert_eq!(extract_path_pattern("/file.txt"), None);
}
#[test]
fn test_extract_path_pattern_display() {
assert_eq!(
extract_path_pattern_display("/Users/alice/project/src/main.rs"),
Some("/Users/alice/project/src/".to_string())
);
assert_eq!(
extract_path_pattern_display("src/lib.rs"),
Some("src/".to_string())
);
}
#[test]
fn test_extract_url_pattern() {
assert_eq!(
extract_url_pattern("https://github.com/user/repo"),
Some("^https?://github\\.com".to_string())
);
assert_eq!(
extract_url_pattern("http://example.com/path?query=1"),
Some("^https?://example\\.com".to_string())
);
assert_eq!(extract_url_pattern("not a url"), None);
}
#[test]
fn test_extract_url_pattern_display() {
assert_eq!(
extract_url_pattern_display("https://github.com/user/repo"),
Some("github.com".to_string())
);
assert_eq!(
extract_url_pattern_display("http://api.example.com/v1/users"),
Some("api.example.com".to_string())
);
}
#[test]
fn test_special_chars_are_escaped() {
assert_eq!(
extract_path_pattern("/path/with (parens)/file.txt"),
Some("^/path/with \\(parens\\)/".to_string())
);
assert_eq!(
extract_url_pattern("https://test.example.com/path"),
Some("^https?://test\\.example\\.com".to_string())
);
}
#[test]
fn test_extract_copy_move_pattern_same_directory() {
assert_eq!(
extract_copy_move_pattern(
"/Users/alice/project/src/old.rs\n/Users/alice/project/src/new.rs"
),
Some("^/Users/alice/project/src/".to_string())
);
}
#[test]
fn test_extract_copy_move_pattern_sibling_directories() {
assert_eq!(
extract_copy_move_pattern(
"/Users/alice/project/src/old.rs\n/Users/alice/project/dst/new.rs"
),
Some("^/Users/alice/project/".to_string())
);
}
#[test]
fn test_extract_copy_move_pattern_no_common_prefix() {
assert_eq!(
extract_copy_move_pattern("/home/file.txt\n/tmp/file.txt"),
None
);
}
#[test]
fn test_extract_copy_move_pattern_relative_paths() {
assert_eq!(
extract_copy_move_pattern("src/old.rs\nsrc/new.rs"),
Some("^src/".to_string())
);
}
#[test]
fn test_extract_copy_move_pattern_display() {
assert_eq!(
extract_copy_move_pattern_display(
"/Users/alice/project/src/old.rs\n/Users/alice/project/dst/new.rs"
),
Some("/Users/alice/project/".to_string())
);
}
#[test]
fn test_extract_copy_move_pattern_no_arrow() {
assert_eq!(extract_copy_move_pattern("just/a/path.rs"), None);
assert_eq!(extract_copy_move_pattern_display("just/a/path.rs"), None);
}
}