initial (and somewhat bonked) powershell support, cargo update

Cargo.lock

@@ -265,9 +265,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.89"
+version = "0.2.91"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "538c092e5586f4cdd7dd8078c4a79220e3e168880218124dcbce860f0ea938c6"
+checksum = "8916b1f6ca17130ec6568feccee27c156ad12037880833a3b842a823236502e7"
 
 [[package]]
 name = "log"
@@ -650,9 +650,9 @@ checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe"
 
 [[package]]
 name = "walkdir"
-version = "2.3.1"
+version = "2.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "777182bc735b6424e1a57516d35ed72cb8019d85c8c9bf536dccb3445c1a2f7d"
+checksum = "808cf2735cd4b6866113f648b791c6adc5714537bc222d9347bb203386ffda56"
 dependencies = [
  "same-file",
  "winapi",

src/formats.rs

@@ -1,14 +1,15 @@
 //! The various formats that [fif](crate) can output to.
 
-use std::io::{self, Write};
 #[cfg(unix)]
 use std::os::unix::ffi::OsStrExt;
+use std::io::{self, Write};
 use std::path::Path;
 
 use snailquote::escape;
 
 use crate::scan_error::ScanError;
 use crate::{Findings, BACKEND};
+use std::ffi::OsStr;
 
 /// The current version of fif, as defined in Cargo.toml.
 const VERSION: Option<&'static str> = option_env!("CARGO_PKG_VERSION");
@@ -36,6 +37,12 @@ impl<'a> From<&'a Path> for Writable<'a> {
 	}
 }
 
+impl<'a> From<&'a OsStr> for Writable<'a> {
+	fn from(p: &'a OsStr) -> Writable<'a> {
+		Writable::Path(p.as_ref())
+	}
+}
+
 fn smart_write<W: Write>(f: &mut W, writeables: &[Writable]) -> io::Result<()> {
 	// ehhhh
 	for writeable in writeables {
@@ -47,13 +54,15 @@ fn smart_write<W: Write>(f: &mut W, writeables: &[Writable]) -> io::Result<()> {
 				if let Some(string) = path.to_str() {
 					write!(f, "{}", escape(string))?
 				} else {
-					write!(f, "'''")?;
+					write!(f, "'")?;
 					#[cfg(unix)]
 					f.write_all(&*path.as_os_str().as_bytes())?;
-					#[cfg(windows)]
-					write!(f, "{}", path.as_os_str().to_string_lossy())?; // TODO: implement bonked strings for windows
+					// TODO: implement bonked strings for windows
+					// something like:
 					// f.write_all(&*path.as_os_str().encode_wide().collect::<Vec<u16>>())?;
-					write!(f, "'''")?
+					#[cfg(windows)]
+					write!(f, "{}", path.as_os_str().to_string_lossy())?;
+					write!(f, "'")?
 				}
 			}
 		}
@@ -158,3 +167,62 @@ impl Format for Script {
 		writeln!(f, "\necho 'Done.'")
 	}
 }
+
+/// PowerShell script.
+pub struct PowerShell {}
+
+impl Format for PowerShell {
+	fn new() -> Self {
+		Self {}
+	}
+
+	fn rename<W: Write>(&self, f: &mut W, from: &Path, to: &Path) -> io::Result<()> {
+		// unfortunately there doesn't seem to be an equivalent of sh's `mv -i` -- passing the '-Confirm' flag will prompt
+		// the user to confirm every single rename, and using Move-Item -Force will always overwrite without prompting.
+		// there doesn't seem to be a way to rename the file, prompting only if the target already exists.
+		smart_write(
+			f,
+			&[
+				"Rename-Item -Path ".into(),
+				from.into(),
+				" -NewName ".into(),
+				to.file_name().unwrap().into(),
+				Writable::Newline,
+			],
+		)
+	}
+
+	fn no_known_extension<W: Write>(&self, f: &mut W, path: &Path) -> io::Result<()> {
+		smart_write(
+			f,
+			&["Write-Output @'\nNo known extension for ".into(), path.into(), "\n'@".into()],
+		)
+	}
+
+	fn unreadable<W: Write>(&self, f: &mut W, path: &Path) -> io::Result<()> {
+		smart_write(
+			f,
+			&["Write-Output @'\nFailed to read ".into(), path.into(), "\n'@".into()],
+		)
+	}
+
+	fn unknown_type<W: Write>(&self, f: &mut W, path: &Path) -> io::Result<()> {
+		smart_write(
+			f,
+			&["<# Failed to detect mime type for ".into(), path.into(), "#>".into()],
+		)
+	}
+
+	fn header<W: Write>(&self, _: &Entries, f: &mut W) -> io::Result<()> {
+		writeln!(
+			f,
+			"#!/usr/bin/env pwsh\n# Generated by fif {} ({} backend)",
+			VERSION.unwrap_or("???"),
+			BACKEND
+		)
+	}
+
+	fn footer<W: Write>(&self, _: &Entries, f: &mut W) -> io::Result<()> {
+		writeln!(f, "\nWrite-Output 'Done!'")
+	}
+}

src/main.rs

@@ -27,7 +27,7 @@ use smartstring::alias::String;
 use walkdir::{DirEntry, WalkDir};
 
 use crate::findings::Findings;
-use crate::formats::{Format, Script};
+use crate::formats::{Format, Script, PowerShell};
 use crate::mime_db::MimeDb;
 use crate::parameters::{OutputFormat, ScanOpts};
 use crate::scan_error::ScanError;
@@ -125,16 +125,18 @@ fn main() {
 		exit(0);
 	}
 
-	match args.output_format {
-		OutputFormat::Script => {
-			let s = Script::new();
-			if s.write_all(&results, &mut BufWriter::new(stdout().lock())).is_err() {
+	let mut buffered_stdout = BufWriter::new(stdout());
+
+	let result = match args.output_format {
+		OutputFormat::Script => Script::new().write_all(&results, &mut buffered_stdout),
+		OutputFormat::PowerShell | OutputFormat::Powershell => PowerShell::new().write_all(&results, &mut buffered_stdout),
+		OutputFormat::Text => todo!()
+	};
+
+	if result.is_err() {
 		error!("Failed to write to stdout.");
 		exit(exitcode::IOERR);
 	}
-		}
-		OutputFormat::Text => todo!(),
-	}
 
 	debug!("Done");
 }

src/parameters.rs

@@ -5,11 +5,24 @@ use std::path::PathBuf;
 use crate::extension_set::ExtensionSet;
 use clap::{AppSettings, Clap};
 use smartstring::{LazyCompact, SmartString};
+use cfg_if::cfg_if;
+
+cfg_if! {
+	if #[cfg(windows)] {
+		const DEFAULT_FORMAT: &str = "powershell";
+	} else {
+		const DEFAULT_FORMAT: &str = "script";
+	}
+}
 
 #[derive(Clap, PartialEq, Debug)]
 pub enum OutputFormat {
 	/// A Bourne shell compatible script.
 	Script,
+	/// A PowerShell script.
+	PowerShell,
+	/// Also a PowerShell script, with different casing to allow for `fif -o powershell`.
+	Powershell,
 	/// Plain text.
 	Text,
 }
@@ -52,7 +65,7 @@ pub struct Parameters {
 	pub scan_extensionless: bool,
 
 	/// Output format to use
-	#[clap(short, long, default_value = "script", arg_enum)]
+	#[clap(short, long, default_value = DEFAULT_FORMAT, arg_enum)]
 	pub output_format: OutputFormat,
 
 	/// Directory to process