Enforce thread safety to allow for multithread interpreter

interpreter/fuzz/Cargo.lock

@@ -8,17 +8,6 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
-[[package]]
-name = "ahash"
-version = "0.7.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fcb51a0695d8f838b1ee009b3fbf66bda078cd64590202a864a8f3e8c4315c47"
-dependencies = [
- "getrandom",
- "once_cell",
- "version_check",
-]
-
 [[package]]
 name = "aho-corasick"
 version = "0.7.18"
@@ -57,6 +46,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
+[[package]]
+name = "base64"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -345,18 +340,6 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e88a8acf291dafb59c2d96e8f59828f3838bb1a70398823ade51a84de6a6deed"
 
-[[package]]
-name = "fallible-iterator"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4443176a9f2c162692bd3d352d745ef9413eec5782a80d8fd6f8a1ac692a07f7"
-
-[[package]]
-name = "fallible-streaming-iterator"
-version = "0.1.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7360491ce676a36bf9bb3c56c1aa791658183a54d2744120f27285738d90465a"
-
 [[package]]
 name = "flate2"
 version = "1.0.24"
@@ -397,30 +380,12 @@ dependencies = [
  "wasi 0.11.0+wasi-snapshot-preview1",
 ]
 
-[[package]]
-name = "hashbrown"
-version = "0.11.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab5ef0d4909ef3724cc8cce6ccc8572c5c817592e9285f5464f8e86f8bd3726e"
-dependencies = [
- "ahash",
-]
-
 [[package]]
 name = "hashbrown"
 version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "db0d4cf898abf0081f964436dc980e96670a0f36863e4b83aaacdb65c9d7ccc3"
 
-[[package]]
-name = "hashlink"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7249a3129cbc1ffccd74857f81464a323a152173cdb134e0fd81bc803b29facf"
-dependencies = [
- "hashbrown 0.11.2",
-]
-
 [[package]]
 name = "heck"
 version = "0.3.3"
@@ -452,7 +417,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "10a35a97730320ffe8e2d410b5d3b69279b98d2c14bdb8b70ea89ecf7888d41e"
 dependencies = [
  "autocfg",
- "hashbrown 0.12.1",
+ "hashbrown",
 ]
 
 [[package]]
@@ -496,17 +461,6 @@ dependencies = [
  "once_cell",
 ]
 
-[[package]]
-name = "libsqlite3-sys"
-version = "0.23.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2cafc7c74096c336d9d27145f7ebd4f4b6f95ba16aa5a282387267e6925cb58"
-dependencies = [
- "cc",
- "pkg-config",
- "vcpkg",
-]
-
 [[package]]
 name = "log"
 version = "0.4.17"
@@ -516,6 +470,15 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "m3u8-rs"
+version = "3.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50fe05791a7f418b59d6cddebdc293d77c9c1f652adbff855c071d4507cd883b"
+dependencies = [
+ "nom",
+]
+
 [[package]]
 name = "maplit"
 version = "1.0.2"
@@ -546,6 +509,12 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
 [[package]]
 name = "miniz_oxide"
 version = "0.5.3"
@@ -570,13 +539,15 @@ dependencies = [
 name = "muss-interpreter"
 version = "0.9.0"
 dependencies = [
+ "base64",
  "bliss-audio-symphonia",
  "dirs",
+ "m3u8-rs",
  "mpd",
  "rand",
  "regex",
- "rusqlite",
  "shellexpand",
+ "sqlparser",
  "symphonia",
  "unidecode",
 ]
@@ -641,6 +612,16 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "nom"
+version = "7.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8903e5a29a317527874d0402f867152a3d21c908bb0b933e416c65e301d4c36"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]
+
 [[package]]
 name = "num-bigint"
 version = "0.4.3"
@@ -760,12 +741,6 @@ dependencies = [
  "sha-1",
 ]
 
-[[package]]
-name = "pkg-config"
-version = "0.3.25"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1df8c4ec4b0627e53bdf214615ad287367e482558cf84b109250b37464dc03ae"
-
 [[package]]
 name = "ppv-lite86"
 version = "0.2.16"
@@ -926,21 +901,6 @@ dependencies = [
  "opaque-debug 0.3.0",
 ]
 
-[[package]]
-name = "rusqlite"
-version = "0.26.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ba4d3462c8b2e4d7f4fcfcf2b296dc6b65404fbbc7b63daa37fd485c149daf7"
-dependencies = [
- "bitflags",
- "fallible-iterator",
- "fallible-streaming-iterator",
- "hashlink",
- "libsqlite3-sys",
- "memchr",
- "smallvec",
-]
-
 [[package]]
 name = "rustc-serialize"
 version = "0.3.24"
@@ -989,10 +949,13 @@ dependencies = [
 ]
 
 [[package]]
-name = "smallvec"
+name = "sqlparser"
-version = "1.8.1"
+version = "0.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cc88c725d61fc6c3132893370cac4a0200e3fedf5da8331c570664b1987f5ca2"
+checksum = "0beb13adabbdda01b63d595f38c8bfd19a361e697fd94ce0098a634077bc5b25"
+dependencies = [
+ "log",
+]
 
 [[package]]
 name = "strength_reduce"
@@ -1281,12 +1244,6 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "402bb19d8e03f1d1a7450e2bd613980869438e0666331be3e073089124aa1adc"
 
-[[package]]
-name = "vcpkg"
-version = "0.2.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
-
 [[package]]
 name = "version_check"
 version = "0.9.4"

interpreter/src/lang/filter.rs

@@ -16,7 +16,7 @@ use crate::Item;
 
 const INNER_VARIABLE_NAME: &str = "[inner variable]";
 
-pub trait FilterPredicate: Clone + Debug + Display {
+pub trait FilterPredicate: Clone + Debug + Display + Send {
     fn matches(&mut self, item: &Item, ctx: &mut Context) -> Result<bool, RuntimeMsg>;
 
     fn is_complete(&self) -> bool;
@@ -24,7 +24,7 @@ pub trait FilterPredicate: Clone + Debug + Display {
     fn reset(&mut self) -> Result<(), RuntimeMsg>;
 }
 
-pub trait FilterFactory<P: FilterPredicate + 'static> {
+pub trait FilterFactory<P: FilterPredicate + 'static>: Send + Sync {
     fn is_filter(&self, tokens: &VecDeque<&Token>) -> bool;
 
     fn build_filter(

interpreter/src/lang/function.rs

@@ -8,7 +8,7 @@ use crate::lang::SyntaxError;
 use crate::lang::{BoxedOpFactory, Op};
 use crate::tokens::Token;
 
-pub trait FunctionFactory<O: Op + 'static> {
+pub trait FunctionFactory<O: Op + 'static>: Send + Sync {
     fn is_function(&self, name: &str) -> bool;
 
     fn build_function_params(

interpreter/src/lang/generator_op.rs

@@ -8,11 +8,11 @@ use crate::Item;
 
 pub struct GeneratorOp {
     context: Option<Context>,
-    generator: Box<dyn FnMut(&mut Context) -> Option<Result<Item, RuntimeMsg>>>,
+    generator: Box<dyn (FnMut(&mut Context) -> Option<Result<Item, RuntimeMsg>>) + Send>,
 }
 
 impl GeneratorOp {
-    pub fn new<F: FnMut(&mut Context) -> Option<Result<Item, RuntimeMsg>> + 'static>(generator_fn: F) -> Self {
+    pub fn new<F: (FnMut(&mut Context) -> Option<Result<Item, RuntimeMsg>>) + Send + 'static>(generator_fn: F) -> Self {
         Self {
             context: None,
             generator: Box::new(generator_fn),

interpreter/src/lang/iter_block.rs

@@ -17,11 +17,11 @@ use crate::Context;
 
 const ITEM_VARIABLE_NAME: &str = "item";
 
-pub trait ItemOp: Debug + Display {
+pub trait ItemOp: Debug + Display + Send + Sync {
     fn execute(&self, context: &mut Context) -> Result<Type, RuntimeMsg>;
 }
 
-pub trait ItemOpFactory<T: Deref<Target = dyn ItemOp> + 'static> {
+pub trait ItemOpFactory<T: Deref<Target = dyn ItemOp> + 'static>: Send + Sync {
     fn is_item_op(&self, tokens: &VecDeque<Token>) -> bool;
 
     fn build_item_op(

interpreter/src/lang/operation.rs

@@ -48,7 +48,7 @@ pub trait OpFactory<T: Op + 'static> {
     }
 }
 
-pub trait BoxedOpFactory {
+pub trait BoxedOpFactory: Send {
     fn build_op_boxed(
         &self,
         tokens: &mut VecDeque<Token>,
@@ -60,7 +60,7 @@ pub trait BoxedOpFactory {
 
 pub type IteratorItem = Result<Item, RuntimeError>;
 
-pub trait Op: Iterator<Item = IteratorItem> + Debug + Display {
+pub trait Op: Iterator<Item = IteratorItem> + Debug + Display + Send {
     fn enter(&mut self, ctx: Context);
 
     fn escape(&mut self) -> Context;

interpreter/src/lang/sorter.rs

@@ -12,7 +12,7 @@ use crate::Context;
 
 const SORTER_ITEM_CACHE_SIZE: usize = 8;
 
-pub trait Sorter: Clone + Debug + Display {
+pub trait Sorter: Clone + Debug + Display + Send + Sync {
     fn sort(
         &mut self,
         iterator: &mut dyn Op,
@@ -22,7 +22,7 @@ pub trait Sorter: Clone + Debug + Display {
     fn reset(&mut self) {}
 }
 
-pub trait SorterFactory<S: Sorter + 'static> {
+pub trait SorterFactory<S: Sorter + 'static>: Send + Sync {
     fn is_sorter(&self, tokens: &VecDeque<&Token>) -> bool;
 
     fn build_sorter(

interpreter/src/lang/vocabulary/item_ops/iter_op.rs

@@ -1,6 +1,7 @@
 use core::ops::Deref;
 use std::collections::VecDeque;
 use std::fmt::{Debug, Display, Error, Formatter};
+use std::sync::Mutex;
 
 use crate::lang::utility::{assert_name, check_name};
 use crate::lang::LanguageDictionary;
@@ -12,7 +13,7 @@ use crate::Context;
 
 #[derive(Debug)]
 pub struct IterItemOp {
-    inner: Box<dyn Op>,
+    inner: Mutex<Box<dyn Op>>,
 }
 
 impl Deref for IterItemOp {
@@ -24,13 +25,19 @@ impl Deref for IterItemOp {
 
 impl Display for IterItemOp {
     fn fmt(&self, f: &mut Formatter) -> Result<(), Error> {
-        write!(f, "iter {}", self.inner)
+        match self.inner.lock() {
+            Ok(inner) => write!(f, "iter {}", inner),
+            Err(e) => write!(f, "iter !?!? (e:{})", e)
+        }
     }
 }
 
 impl ItemOp for IterItemOp {
     fn execute(&self, _context: &mut Context) -> Result<Type, RuntimeMsg> {
-        Ok(Type::Op(self.inner.dup()))
+        match self.inner.lock() {
+            Ok(inner) => Ok(Type::Op(inner.dup())),
+            Err(e) => Err(RuntimeMsg(format!("IterItemOp lock failed: {}", e)))
+        }
     }
 }
 
@@ -49,6 +56,6 @@ impl ItemOpFactory<IterItemOp> for IterItemOpFactory {
     ) -> Result<IterItemOp, SyntaxError> {
         assert_name("iter", tokens)?;
         let inner_op = dict.try_build_statement(tokens)?;
-        Ok(IterItemOp { inner: inner_op })
+        Ok(IterItemOp { inner: Mutex::new(inner_op) })
     }
 }

interpreter/src/processing/filesystem.rs

@@ -329,7 +329,7 @@ impl Iterator for FileIter {
     }
 }
 
-pub trait FilesystemQuerier: Debug {
+pub trait FilesystemQuerier: Debug + Send {
     fn raw(
         &mut self,
         folder: Option<&str>,
@@ -369,7 +369,7 @@ pub struct FilesystemExecutor {}
 
 impl FilesystemExecutor {
     #[cfg(feature = "collections")]
-    fn read_m3u8<P: AsRef<Path> + 'static>(&self, path: P) -> Result<GeneratorOp, RuntimeMsg> {
+    fn read_m3u8<P: AsRef<Path> + Send + 'static>(&self, path: P) -> Result<GeneratorOp, RuntimeMsg> {
         let mut file = std::fs::File::open(&path).map_err(|e| RuntimeMsg(format!("Path read error: {}", e)))?;
         let mut file_bytes = Vec::new();
         file.read_to_end(&mut file_bytes).map_err(|e| RuntimeMsg(format!("File read error: {}", e)))?;

interpreter/src/processing/mpd.rs

@@ -11,7 +11,7 @@ use crate::lang::TypePrimitive;
 use crate::Item;
 
 /// Music Player Daemon interface for interacting with it's database
-pub trait MpdQuerier: Debug {
+pub trait MpdQuerier: Debug + Send {
     fn connect(&mut self, addr: SocketAddr) -> Result<(), RuntimeMsg>;
 
     fn search(&mut self, params: Vec<(&str, String)>) -> Result<VecDeque<Item>, RuntimeMsg>;

interpreter/src/processing/music_analysis.rs

@@ -23,7 +23,7 @@ use crate::Item;
 
 const PATH_FIELD: &str = "filename";
 
-pub trait MusicAnalyzer: Debug {
+pub trait MusicAnalyzer: Debug + Send {
     fn prepare_distance(&mut self, from: &Item, to: &Item) -> Result<(), RuntimeMsg>;
 
     fn prepare_item(&mut self, item: &Item) -> Result<(), RuntimeMsg>;

interpreter/src/processing/sql/executor.rs

@@ -18,7 +18,7 @@ use crate::Item;
 pub type QueryResult = Result<Box<dyn Op>, RuntimeMsg>;
 
 /// SQL querying functionality, loosely de-coupled from any specific SQL dialect (excluding raw call)
-pub trait DatabaseQuerier: Debug {
+pub trait DatabaseQuerier: Debug + Send {
     /// raw SQL call, assumed (but not guaranteed) to retrieved music items
     fn raw(&mut self, query: &str) -> QueryResult;
 

interpreter/src/processing/variables.rs

@@ -31,7 +31,7 @@ impl Type {
     }
 }
 
-pub trait VariableStorer: Debug {
+pub trait VariableStorer: Debug + Send {
     fn get(&self, name: &str) -> Result<&'_ Type, RuntimeMsg> {
         match self.get_opt(name) {
             Some(item) => Ok(item),

src/repl.rs

@@ -113,15 +113,27 @@ fn pretty_print_item(item: &Item, terminal: &mut Term, args: &CliArgs, verbose:
         fields.sort();
         for field in fields {
             if field != "title" {
+                let field_str = item.field(field).unwrap_or(&TypePrimitive::Empty).as_str();
+                let max_len = terminal.size().1 as usize - (args.prompt.len() + field.len() + 8);
+                if field_str.len() >= max_len {
+                    writeln!(
+                        terminal,
+                        "  {}: `{}[...]`",
+                        field,
+                        &field_str[..max_len-5]
+                    )
+                    .expect(TERMINAL_WRITE_ERROR);
+                } else {
                     writeln!(
                         terminal,
                         "  {}: `{}`",
                         field,
-                    item.field(field).unwrap_or(&TypePrimitive::Empty).as_str()
+                        field_str
                     )
                     .expect(TERMINAL_WRITE_ERROR);
                 }
             }
+        }
     } else {
         writeln!(
             terminal,