customizable syntax highlighting

2 files changed, 49 insertions, 1 deletions

diff --git a/src/run/builtin.rs b/src/run/builtin.rs
index c946472..2255997 100644
--- a/src/run/builtin.rs
+++ b/src/run/builtin.rs
@@ -967,6 +967,46 @@ impl Builtin for export {
     }
 }
 
+#[derive(Copy, Clone)]
+pub struct pish_theme;
+
+impl Builtin for pish_theme {
+    fn name(&self) -> &str {
+        "pish_theme"
+    }
+
+    fn io(
+        &self,
+        session: Arc<Mutex<Session>>,
+        args: &[BString],
+        _stdin: &mut dyn Read,
+        stdout: &mut dyn Write,
+    ) -> Result {
+        if args.len() != 2 {
+            stdout.write_all(b"usage: pish_theme <kind> <color>\nwhere color is an ansi escape code,\nand where kind is one of the following: ")?;
+            for ident in crate::parse::HighlightKind::all_identifiers() {
+                stdout.write_all(&ident)?;
+                stdout.write_all(b" ")?;
+            }
+            stdout.write_all(b"\n")?;
+            return Err(Error::Exit(-1));
+        }
+
+        let mut se = session.lock().unwrap();
+        match se.highlighter.set_color(&args[0], &args[1]) {
+            Ok(_) => Ok(()),
+            Err(e) => match e {
+                syntax_highlighting::SetColorError::NoSuchKeyword => {
+                    stdout.write_all(b"no such kind: ")?;
+                    stdout.write_all(&args[0])?;
+                    stdout.write_all(b"\n")?;
+                    Err(Error::Exit(-1))
+                }
+            },
+        }
+    }
+}
+
 #[cfg(debug_assertions)]
 mod dbg {
     use super::*;
diff --git a/src/run/mod.rs b/src/run/mod.rs
index f34b678..842a918 100644
--- a/src/run/mod.rs
+++ b/src/run/mod.rs
@@ -451,7 +451,14 @@ impl Executor {
         stdin: InputReader,
         stdout: OutputWriter,
     ) -> SpawnedCmd {
-        self.execute_block(parse::Block { commands: s.stmts, finished_parsing: true }, stdin, stdout)
+        self.execute_block(
+            parse::Block {
+                commands: s.stmts,
+                finished_parsing: true,
+            },
+            stdin,
+            stdout,
+        )
     }
 }
 
@@ -711,6 +718,7 @@ const BUILTINS: &[&'static dyn BuiltinClone] = &[
     &builtin::Here,
     &builtin::logo,
     &builtin::export,
+    &builtin::pish_theme,
 ];
 
 pub fn builtin_map() -> HashMap<BString, &'static dyn BuiltinClone> {