Fix for Windows: do not run binaries from CWD

This fixes a bug on Windows where `Command::new` would also run
executables from the current working directory, possibly resulting in
accidental runs of programs called `less`.

src/less.rs

@@ -4,7 +4,9 @@ use std::ffi::OsStr;
 use std::process::Command;
 
 pub fn retrieve_less_version(less_path: &dyn AsRef<OsStr>) -> Option<usize> {
-    let cmd = Command::new(less_path).arg("--version").output().ok()?;
+    let resolved_path = grep_cli::resolve_binary(less_path.as_ref()).ok()?;
+
+    let cmd = Command::new(resolved_path).arg("--version").output().ok()?;
     parse_less_version(&cmd.stdout)
 }
 

src/output.rs

@@ -63,7 +63,14 @@ impl OutputType {
             return Err(ErrorKind::InvalidPagerValueBat.into());
         }
 
-        let mut p = Command::new(&pager.bin);
+        let resolved_path = match grep_cli::resolve_binary(&pager.bin) {
+            Ok(path) => path,
+            Err(_) => {
+                return Ok(OutputType::stdout());
+            }
+        };
+
+        let mut p = Command::new(resolved_path);
         let args = pager.args;
 
         if pager.kind == PagerKind::Less {