proof of concept: talking to `isabelle server`

for now this just checks a file given on the command line, and panics if
anything at all goes wrong.

2 files changed, 326 insertions, 0 deletions

diff --git a/isabelle-proto/Cargo.toml b/isabelle-proto/Cargo.toml
new file mode 100644
index 0000000..351532f
--- /dev/null
+++ b/isabelle-proto/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "isabelle-proto"
+version = "0.1.0"
+authors = ["stuebinm <stuebinm@disroot.org>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+regex = "1"
+serde = { version = "1.0.130", features = [ "derive" ] }
+serde_json = "1.0.68"
+isabelle-unicode = { path = "../isabelle-unicode" }
+structopt = "0.3.23"
diff --git a/isabelle-proto/src/main.rs b/isabelle-proto/src/main.rs
new file mode 100644
index 0000000..1ee20a9
--- /dev/null
+++ b/isabelle-proto/src/main.rs
@@ -0,0 +1,312 @@
+
+use regex::Regex;
+use serde::{Deserialize, Serialize, de::DeserializeOwned};
+use serde_json::{Result, Value};
+
+use std::{io::{BufRead, BufReader, BufWriter, Write}, path::PathBuf, process::{ChildStdout, Command, Stdio}};
+
+use isabelle_unicode::PrettyUnicode;
+
+use structopt::StructOpt;
+
+type SessionID = String;
+type TaskID = String;
+
+#[derive(Serialize, Deserialize)]
+#[serde(untagged)]
+enum ClientCommand {
+    UseTheories {
+        session_id : SessionID,
+        theories : Vec<String>,
+        master_dir : Option<String>
+    },
+    SessionStart {
+        session : String,
+        include_sessions : Vec<String>
+    },
+    Echo (String),
+    ShutDown
+}
+
+#[derive(Debug)]
+enum SyncAnswer<T,E> {
+    Ok (T),
+    Error (E),
+}
+
+enum AsyncAnswer<T, E, N> {
+    Finished (T),
+    Failed (E),
+    Note (N)
+}
+
+#[derive(Deserialize, Debug)]
+struct ClientHello {
+    isabelle_id : String,
+    isabelle_version : String
+}
+
+#[derive(Deserialize)]
+struct SessionStartedOk {
+    session_id : String,
+    tmp_dir : String,
+    task : String
+}
+
+#[derive(Deserialize)]
+struct SessionStartedNote {
+    percentage : u8,
+    task : TaskID,
+    message : String,
+    kind : String,
+    session : String,
+    theory : String
+}
+
+#[derive(Deserialize, Clone, Debug)]
+struct SessionStartedFinished {
+    session_id : SessionID,
+    tmp_dir : String,
+    task : TaskID
+}
+
+
+
+#[derive(Deserialize, Clone, Debug)]
+struct UseTheoriesFinished {
+    ok : bool,
+    errors : Vec<IsabelleError>,
+    nodes : Vec<IsabelleNode>,
+    task : TaskID,
+}
+
+#[derive(Deserialize, Clone, Debug)]
+struct IsabelleError {
+    kind : String,
+    message : String,
+    pos : Span
+}
+
+#[derive(Deserialize, Clone, Debug)]
+struct IsabelleNode {
+    messages : Vec<IsabelleError>,
+    exports : Vec<()>,
+    status : Status,
+    theory_name : String,
+    node_name : String
+}
+
+#[derive(Deserialize, Clone, Debug)]
+struct Status {
+    percentage : u8,
+    unprocessed : u64,
+    running : u64,
+    finished : u64,
+    failed : u64,
+    total : u64,
+    consolidated : bool,
+    canceled : bool,
+    ok : bool,
+    warned : u64
+}
+
+#[derive(Deserialize,Clone, Debug)]
+struct Span {
+    line : u64,
+    offset : u64,
+    end_offset : u64,
+    file : String
+}
+
+#[derive(Deserialize)]
+struct AsyncStartOk {
+    task : TaskID
+}
+
+fn decode_sync<'a, T> (msg: &'a str) -> Option<SyncAnswer<T, String>>
+where T: Deserialize<'a> {
+    let regex = Regex::new(r"^[a-zA-Z]+\b").unwrap();
+    let mat = regex.find(msg)?;
+    let ty = &msg[..mat.end()];
+    let rest = &msg[mat.end()..];
+
+    match ty {
+        "OK" => Some(SyncAnswer::Ok(serde_json::from_str(&rest).ok()?)),
+        "ERROR" => Some(SyncAnswer::Error(rest.to_owned())),
+        _ => None
+    }
+}
+
+fn decode_async<'a,T,E,N> (msg: &'a str) -> Option<AsyncAnswer<T,E,N>>
+where T: Deserialize<'a>, N: Deserialize<'a>, E: Deserialize<'a> {
+    let regex = Regex::new(r"^[a-zA-Z]+\b").unwrap();
+    let mat = regex.find(msg)?;
+    let ty = &msg[..mat.end()];
+    let rest = &msg[mat.end()..];
+
+    match ty {
+        "NOTE" => Some(AsyncAnswer::Note(serde_json::from_str(&rest).ok()?)),
+        "FINISHED" => Some(AsyncAnswer::Finished(serde_json::from_str(&rest).ok()?)),
+        "FAILED" => Some(AsyncAnswer::Failed(serde_json::from_str(&rest).ok()?)),
+        _ => None
+    }
+}
+
+
+
+trait Encode {
+    fn encode (&self) -> String;
+}
+
+impl Encode for ClientCommand {
+    fn encode (&self) -> String {
+        let ty = match self {
+            ClientCommand::UseTheories {..} => "use_theories",
+            ClientCommand::SessionStart {..} => "session_start",
+            ClientCommand::Echo (..) => "echo",
+            ClientCommand::ShutDown => "shutdown"
+        };
+
+        let blob = serde_json::to_string(self).unwrap();
+
+        let res = ty.to_owned() + &blob + "\n";
+        res
+    }
+}
+
+fn wait_for_client(pipe: &mut BufReader<ChildStdout>) -> Option<ClientHello> {
+    for res in pipe.lines() {
+        match res {
+            Err(_) => (),
+            Ok(line) => {
+                let hello : Option<SyncAnswer<ClientHello, _>> = decode_sync(&line);
+                if let Some(SyncAnswer::Ok(data)) = hello {
+                    return Some(data);
+                }
+            }
+        }
+    }
+    None
+}
+
+
+fn wait_for_async_task<'a,T,E,N,F>
+    (reader: &mut BufReader<ChildStdout>, task: &str, mut prog: F) -> Option<T>
+where T: DeserializeOwned, E: DeserializeOwned, N: DeserializeOwned,
+F: FnMut(N)
+{
+    for res in reader.lines() {
+        match res {
+            Err(_) => (),
+            Ok(line) => {
+                let regex = Regex::new(r"^[0-9]+$").unwrap();
+                if regex.is_match(&line) {
+
+                } else {
+                    match decode_async::<T,E,N>(&line)? {
+                        AsyncAnswer::Finished(data)
+                            => return Some(data),
+                        AsyncAnswer::Failed(_failed)
+                            => panic!("building session failed"),
+                        AsyncAnswer::Note(val) => prog(val)
+                    }
+                }
+            }
+        }
+    };
+    None
+}
+
+fn get_async_task_id (reader: &mut BufReader<ChildStdout>) -> TaskID {
+    let mut res = String::new();
+    reader.read_line(&mut res).unwrap();
+    match decode_sync(&res).unwrap() {
+        SyncAnswer::Ok(AsyncStartOk { task }) => task,
+        SyncAnswer::Error(_) => panic!("failed to start async task!")
+    }
+}
+
+#[derive(StructOpt)]
+#[structopt(name = "isabelle-proto-POC", about="proof of concept for communicating with an Isabelle server")]
+struct Options {
+    theory : String,
+    #[structopt(name="directory", default_value=Box::leak(Box::new(std::env::current_dir().unwrap().into_os_string().into_string().unwrap())))]
+    directory : String
+}
+
+fn main() {
+    let options = Options::from_args();
+    println!("will check: {} in {}", options.theory, options.directory);
+
+    let mut child = Command::new("isabelle")
+        .arg("client")
+        .stdin(Stdio::piped())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped())
+        .spawn()
+        .expect("failed to run isabelle client!");
+
+    let stdin = child.stdin.as_mut().unwrap();
+    let stdout = child.stdout.take().unwrap();
+
+    let mut reader = BufReader::new(stdout);
+
+    let _ = wait_for_client(&mut reader);
+    // TODO: display version information?
+
+    let mut len : usize = 0;
+
+    let session_id = match std::env::var("ISABAT_SESSION_ID") {
+        Ok(id) => id,
+        Err(_) => {
+
+            // client should be ready, start a session
+            stdin.write(ClientCommand::SessionStart{
+                session: "HOL".to_string(),
+                include_sessions: vec![],
+            }.encode().as_bytes()).unwrap();
+
+            let task = get_async_task_id(&mut reader);
+
+            let started = wait_for_async_task::<SessionStartedFinished, Value, Value,_>(&mut reader, &task, |note| {
+                if let Some(Value::String(msg)) = note.get("message") {
+                    len = msg.len();
+                    print!("{}\r", msg);
+                    std::io::stdout().flush().unwrap();
+                }
+            }).unwrap();
+
+            started.session_id
+        }
+    };
+
+
+    // HOL should be loaded now, include a theory file
+
+    stdin.write(ClientCommand::UseTheories {
+        session_id,
+        theories: vec![ options.theory ],
+        master_dir: Some(options.directory),
+    }.encode().as_bytes()).unwrap();
+
+    let task = get_async_task_id(&mut reader);
+    let result = wait_for_async_task::<UseTheoriesFinished, Value, Value, _>(&mut reader, &task, |note| {
+        if let Some(Value::String(msg)) = note.get("message") {
+            let white = len.checked_sub(msg.len()).unwrap_or(0);
+            len = msg.len();
+            print!("{}{}\r", msg, str::repeat(" ", white));
+            std::io::stdout().flush().unwrap();
+        }
+    }).unwrap();
+    println!("{}", str::repeat(" ", len));
+
+    // built a theory! Let's display errors
+
+    result
+        .errors
+        .iter()
+        .for_each(|err| {
+            println!("Isabelle Error:");
+            println!("{}", err.message.to_pretty_unicode().unwrap())
+        });
+}