feat: powershell initialization & native windows support (github #15)

README.md

@@ -56,6 +56,16 @@ Please follow the instruction for your shell:
 
 </details>
 
+<details>
+	<summary>PowerShell</summary>
+
+> Append the following to your profile:
+> ```pwsh
+> pay-respects pwsh [--alias <alias>] [--nocnf] [>> $PROFILE] # use the pipe to directly append it to your profile if you like
+> ```
+
+</details>
+
 <details>
 	<summary>Custom initialization for arbitrary shell</summary>
 

src/files.rs

@@ -1,30 +1,56 @@
 use crate::suggestions::find_similar;
 
 pub fn get_path_files() -> Vec<String> {
-	let path_env = if cfg!(windows) {
+	let path_env = {
-		String::from_utf8_lossy(
+		#[cfg(windows)]
-			&std::process::Command::new("bash")
+		{
-				.arg("-c")
+			if is_msystem() {
-				.arg("echo $PATH")
+				String::from_utf8_lossy(
-				.output()
+					&std::process::Command::new("bash")
-				.unwrap()
+						.arg("-c")
-				.stdout,
+						.arg("echo $PATH")
-		)
+						.output()
-		.trim()
+						.unwrap()
-		.to_owned()
+						.stdout,
-	} else {
+				)
-		std::env::var("PATH").unwrap()
+				.trim()
+				.to_owned()
+			} else {
+				std::env::var("PATH").unwrap()
+			}
+		}
+		#[cfg(not(windows))]
+		{
+			std::env::var("PATH").unwrap()
+		}
 	};
 
 	if cfg!(debug_assertions) {
 		eprintln!("path_env: {path_env}");
 	}
 
-	let path = path_env.split(':').collect::<Vec<&str>>();
+	let path_env_sep = {
+		#[cfg(windows)]
+		if is_msystem() {
+			":"
+		} else {
+			";"
+		}
+		#[cfg(not(windows))]
+		{
+			":"
+		}
+	};
+
+	let path = path_env.split(path_env_sep).collect::<Vec<&str>>();
 	let mut all_executable = vec![];
 	for p in path {
 		#[cfg(windows)]
-		let p = msys2_conv_path(p).expect("Failed to convert path for msys");
+		let p = if is_msystem() {
+			msys2_conv_path(p).expect("Failed to convert path for msys")
+		} else {
+			p.to_owned()
+		};
 
 		if cfg!(debug_assertions) {
 			eprintln!("p={p}");
@@ -125,3 +151,7 @@ fn msys2_conv_path(p: &str) -> std::io::Result<String> {
 		.output()
 		.map(|output| String::from_utf8_lossy(&output.stdout).trim().to_owned())
 }
+#[cfg(windows)]
+fn is_msystem() -> bool {
+	std::env::var("MSYSTEM").is_ok()
+}

src/runtime_rules.rs

@@ -134,8 +134,12 @@ fn eval_suggest(suggest: &str, last_command: &str, error_msg: &str, shell: &str)
 }
 
 fn get_rule(executable: &str) -> Option<String> {
-	let xdg_config_home = std::env::var("XDG_CONFIG_HOME")
+	let xdg_config_home = if cfg!(windows) {
-		.unwrap_or_else(|_| std::env::var("HOME").unwrap() + "/.config");
+		std::env::var("APPDATA").unwrap()
+	} else {
+		std::env::var("XDG_CONFIG_HOME")
+			.unwrap_or_else(|_| std::env::var("HOME").unwrap() + "/.config")
+	};
 
 	let user_rule_dir = format!("{}/pay-respects/rules", xdg_config_home);
 	let user_rule_file = format!("{}/{}.toml", user_rule_dir, executable);

src/shell.rs

@@ -164,6 +164,10 @@ pub fn initialization(shell: &str, binary_path: &str, auto_alias: &str, cnf: boo
 			last_command = "(history | last).command";
 			alias = "\"\"";
 		}
+		"pwsh" | "powershell" => {
+			last_command = "Get-History | Select-Object -Last 1 | ForEach-Object {$_.CommandLine}";
+			alias = ";";
+		}
 		_ => {
 			println!("Unknown shell: {}", shell);
 			std::process::exit(1);
@@ -190,15 +194,45 @@ def --env {} [] {{
 		std::process::exit(0);
 	}
 
-	let mut init = format!(
+	let mut init = match shell {
-		"\
+		"bash" | "zsh" | "fish" => format!(
+			"\
 			eval $(_PR_LAST_COMMAND=\"{}\" \
 			_PR_ALIAS=\"{}\" \
 			_PR_SHELL=\"{}\" \
 			\"{}\")",
-		last_command, alias, shell, binary_path
+			last_command, alias, shell, binary_path
-	);
+		),
-
+		"pwsh" | "powershell" => format!(
+			r#"& {{
+    try {{
+        # fetch command and error from session history only when not in cnf mode
+        if ($env:_PR_MODE -ne 'cnf') {{  
+            $env:_PR_LAST_COMMAND = ({});
+            $err = Get-Error;
+            if ($env:_PR_LAST_COMMAND -eq $err.InvocationInfo.Line) {{
+                $env:_PR_ERROR_MSG = $err.Exception.Message
+            }}
+        }}
+        $env:_PR_SHELL = '{}';
+        &'{}';
+    }}
+    finally {{
+        # restore mode from cnf
+        if ($env:_PR_MODE -eq 'cnf') {{
+            $env:_PR_MODE = $env:_PR_PWSH_ORIGIN_MODE;
+            $env:_PR_PWSH_ORIGIN_MODE = $null;
+        }}
+    }}
+}}
+"#,
+			last_command, shell, binary_path
+		),
+		_ => {
+			println!("Unsupported shell: {}", shell);
+			exit(1);
+		}
+	};
 	if auto_alias.is_empty() {
 		println!("{}", init);
 		std::process::exit(0);
@@ -218,6 +252,13 @@ end
 				auto_alias, init
 			);
 		}
+		"pwsh" | "powershell" => {
+			init = format!(
+				"function {} {{\n{}",
+				auto_alias,
+				init.split_once("\n").unwrap().1,
+			);
+		}
 		_ => {
 			println!("Unsupported shell: {}", shell);
 			exit(1);
@@ -250,6 +291,30 @@ end
 					shell, binary_path, init
 				);
 			}
+			"pwsh" | "powershell" => {
+				init = format!(
+					r#"{}
+$ExecutionContext.InvokeCommand.CommandNotFoundAction = 
+{{
+    param(
+        [string]
+        $commandName,
+        [System.Management.Automation.CommandLookupEventArgs]
+        $eventArgs
+    )
+    # powershell does not support run command with specific environment variables
+    # but you must set global variables. so we are memorizing the current mode and the alias function will reset it later.
+    $env:_PR_PWSH_ORIGIN_MODE=$env:_PR_MODE;
+    $env:_PR_MODE='cnf';
+    # powershell may search command with prefix 'get-' or '.\' first when this hook is hit, strip them
+    $env:_PR_LAST_COMMAND=$commandName -replace '^get-|\.\\','';
+    $eventArgs.Command = (Get-Command {});
+    $eventArgs.StopSearch = $True;
+}}
+"#,
+					init, auto_alias
+				)
+			}
 			_ => {
 				println!("Unsupported shell: {}", shell);
 				exit(1);