switch to multi-file approach, implement persisting command history

helix-loader/src/lib.rs

@@ -15,7 +15,7 @@ static CONFIG_FILE: once_cell::sync::OnceCell<PathBuf> = once_cell::sync::OnceCe
 
 static LOG_FILE: once_cell::sync::OnceCell<PathBuf> = once_cell::sync::OnceCell::new();
 
-static SESSION_FILE: once_cell::sync::OnceCell<PathBuf> = once_cell::sync::OnceCell::new();
+static COMMAND_HISTFILE: once_cell::sync::OnceCell<PathBuf> = once_cell::sync::OnceCell::new();
 
 pub fn initialize_config_file(specified_file: Option<PathBuf>) {
     let config_file = specified_file.unwrap_or_else(default_config_file);
@@ -29,10 +29,10 @@ pub fn initialize_log_file(specified_file: Option<PathBuf>) {
     LOG_FILE.set(log_file).ok();
 }
 
-pub fn initialize_session_file(specified_file: Option<PathBuf>) {
-    let session_file = specified_file.unwrap_or_else(default_session_file);
-    ensure_parent_dir(&session_file);
-    SESSION_FILE.set(session_file).ok();
+pub fn initialize_command_histfile(specified_file: Option<PathBuf>) {
+    let command_histfile = specified_file.unwrap_or_else(default_command_histfile);
+    ensure_parent_dir(&command_histfile);
+    COMMAND_HISTFILE.set(command_histfile).ok();
 }
 
 /// A list of runtime directories from highest to lowest priority
@@ -156,8 +156,11 @@ pub fn log_file() -> PathBuf {
     LOG_FILE.get().map(|path| path.to_path_buf()).unwrap()
 }
 
-pub fn session_file() -> PathBuf {
-    SESSION_FILE.get().map(|path| path.to_path_buf()).unwrap()
+pub fn command_histfile() -> PathBuf {
+    COMMAND_HISTFILE
+        .get()
+        .map(|path| path.to_path_buf())
+        .unwrap()
 }
 
 pub fn workspace_config_file() -> PathBuf {
@@ -172,8 +175,8 @@ pub fn default_log_file() -> PathBuf {
     cache_dir().join("helix.log")
 }
 
-pub fn default_session_file() -> PathBuf {
-    state_dir().join("helix.session")
+pub fn default_command_histfile() -> PathBuf {
+    state_dir().join("command_history")
 }
 
 /// Merge two TOML documents, merging values from `right` onto `left`

helix-term/src/application.rs

@@ -27,7 +27,6 @@ use crate::{
     handlers,
     job::Jobs,
     keymap::Keymaps,
-    session,
     ui::{self, overlay::overlaid},
 };
 
@@ -1255,9 +1254,6 @@ impl Application {
             ));
         }
 
-        #[cfg(not(feature = "integration"))]
-        session::write_session_file();
-
         errs
     }
 }

helix-term/src/args.rs

@@ -16,7 +16,6 @@ pub struct Args {
     pub verbosity: u64,
     pub log_file: Option<PathBuf>,
     pub config_file: Option<PathBuf>,
-    pub session_file: Option<PathBuf>,
     pub files: Vec<(PathBuf, Position)>,
     pub working_directory: Option<PathBuf>,
 }
@@ -62,10 +61,6 @@ impl Args {
                     Some(path) => args.log_file = Some(path.into()),
                     None => anyhow::bail!("--log must specify a path to write"),
                 },
-                "--session-file" => match argv.next().as_deref() {
-                    Some(path) => args.session_file = Some(path.into()),
-                    None => anyhow::bail!("--session-file must specify a path to write"),
-                },
                 "-w" | "--working-dir" => match argv.next().as_deref() {
                     Some(path) => {
                         args.working_directory = if Path::new(path).is_dir() {

helix-term/src/main.rs

@@ -63,7 +63,6 @@ FLAGS:
     -v                             Increases logging verbosity each use for up to 3 times
     --log <file>                   Specifies a file to use for logging
                                    (default file: {})
-    --session-file <file>          Specifies a file to use for shared data
     -V, --version                  Prints version information
     --vsplit                       Splits all given files vertically into different windows
     --hsplit                       Splits all given files horizontally into different windows
@@ -81,7 +80,7 @@ FLAGS:
 
     helix_loader::initialize_config_file(args.config_file.clone());
     helix_loader::initialize_log_file(args.log_file.clone());
-    helix_loader::initialize_session_file(args.session_file.clone());
+    helix_loader::initialize_command_histfile(None);
 
     // Help has a higher priority and should be handled separately.
     if args.display_help {

helix-term/src/session.rs

@@ -1,68 +1,19 @@
-use bincode::{encode_into_std_write, Decode, Encode};
-use helix_loader::{session_file, VERSION_AND_GIT_HASH};
-// use helix_view::view::ViewPosition;
-use std::{
-    fs::File,
-    time::{SystemTime, UNIX_EPOCH},
-};
-
-// TODO: should this be non-exhaustive?
-#[derive(Debug, Encode, Decode)]
-struct Header {
-    generator: String,
-    version: String,
-    max_kbyte: u32,
-    pid: u32,
-}
-
-// TODO: should this be non-exhaustive?
-#[derive(Debug, Encode, Decode)]
-struct FilePosition {
-    path: String,
-    // position: ViewPosition,
-}
-
-// TODO: should this be non-exhaustive?
-#[derive(Debug, Encode, Decode)]
-enum EntryData {
-    Header(Header),
-    FilePosition(FilePosition),
-}
-
-// TODO: should this be non-exhaustive?
-#[derive(Debug, Encode, Decode)]
-struct Entry {
-    timestamp: u64,
-    data: EntryData,
-}
-
-fn timestamp_now() -> u64 {
-    SystemTime::now()
-        .duration_since(UNIX_EPOCH)
-        .unwrap_or_default()
-        .as_secs()
-}
-
-fn generate_header() -> Entry {
-    Entry {
-        timestamp: timestamp_now(),
-        data: EntryData::Header(Header {
-            generator: "helix".to_string(),
-            version: VERSION_AND_GIT_HASH.to_string(),
-            max_kbyte: 100,
-            pid: std::process::id(),
-        }),
-    }
-}
-
-pub fn write_session_file() {
-    // TODO: merge existing file if exists
-
+use helix_loader::command_histfile;
+use std::{fs::OpenOptions, io::Write};
+
+pub fn push_history(register: char, line: &str) {
+    let filepath = match register {
+        ':' => command_histfile(),
+        _ => return,
+    };
+
+    let mut file = OpenOptions::new()
+        .append(true)
+        .create(true)
+        .open(filepath)
         // TODO: do something about this unwrap
-    let mut session_file = File::create(session_file()).unwrap();
-
-    let header = generate_header();
+        .unwrap();
 
     // TODO: do something about this unwrap
-    encode_into_std_write(&header, &mut session_file, bincode::config::standard()).unwrap();
+    writeln!(file, "{}", line).unwrap();
 }

helix-term/src/ui/prompt.rs

@@ -1,5 +1,5 @@
 use crate::compositor::{Component, Compositor, Context, Event, EventResult};
-use crate::{alt, ctrl, key, shift, ui};
+use crate::{alt, ctrl, key, session, shift, ui};
 use arc_swap::ArcSwap;
 use helix_core::syntax;
 use helix_view::document::Mode;
@@ -614,6 +614,8 @@ impl Component for Prompt {
                                 {
                                     cx.editor.set_error(err.to_string());
                                 }
+                                #[cfg(not(feature = "integration"))]
+                                session::push_history(register, &self.line);
                             };
                         }