Implemented the autocmd builtin, which allows you to register hooks for certain shell events.

Cargo.lock

@@ -85,9 +85,9 @@ checksum = "7c02d123df017efcdfbd739ef81735b36c5ba83ec3c59c80a9d7ecc718f92e50"
 
 [[package]]
 name = "bitflags"
-version = "2.10.0"
+version = "2.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "812e12b5285cc515a9c72a5c1d3b6d46a19dac5acfef5265968c166106e31dd3"
+checksum = "843867be96c8daad0d758b57df9392b6d8d271134fce549de6ce169ff98a92af"
 
 [[package]]
 name = "cfg-if"
@@ -114,9 +114,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.5.55"
+version = "4.5.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3e34525d5bbbd55da2bb745d34b36121baac88d07619a9a09cfcf4a6c0832785"
+checksum = "2797f34da339ce31042b27d23607e051786132987f595b02ba4f6a6dffb7030a"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -124,9 +124,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.5.55"
+version = "4.5.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59a20016a20a3da95bef50ec7238dbd09baeef4311dcdd38ec15aba69812fb61"
+checksum = "24a241312cea5059b13574bb9b3861cabf758b879c15190b37b6d6fd63ab6876"
 dependencies = [
  "anstream",
  "anstyle",
@@ -148,9 +148,9 @@ dependencies = [
 
 [[package]]
 name = "clap_lex"
-version = "0.7.7"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3e64b0cc0439b12df2fa678eae89a1c56a529fd067a9115f7827f1fffd22b32"
+checksum = "3a822ea5bc7590f9d40f1ba12c0dc3c2760f3482c6984db1573ad11031420831"
 
 [[package]]
 name = "colorchoice"
@@ -250,21 +250,9 @@ checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
 
 [[package]]
 name = "getrandom"
-version = "0.3.4"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "899def5c37c4fd7b2664648c28120ecec138e4d395b459e5ca34f9cce2dd77fd"
+checksum = "0de51e6874e94e7bf76d726fc5d13ba782deca734ff60d5bb2fb2607c7406555"
-dependencies = [
- "cfg-if",
- "libc",
- "r-efi",
- "wasip2",
-]
-
-[[package]]
-name = "getrandom"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "139ef39800118c7683f2fd3c98c1b23c09ae076556b435f8e9064ae108aaeeec"
 dependencies = [
  "cfg-if",
  "libc",
@@ -321,9 +309,9 @@ dependencies = [
 
 [[package]]
 name = "insta"
-version = "1.46.1"
+version = "1.46.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "248b42847813a1550dafd15296fd9748c651d0c32194559dbc05d804d54b21e8"
+checksum = "e82db8c87c7f1ccecb34ce0c24399b8a73081427f3c7c50a5d597925356115e4"
 dependencies = [
  "console",
  "once_cell",
@@ -354,9 +342,9 @@ checksum = "92ecc6618181def0457392ccd0ee51198e065e016d1d527a7ac1b6dc7c1f09d2"
 
 [[package]]
 name = "jiff"
-version = "0.2.20"
+version = "0.2.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c867c356cc096b33f4981825ab281ecba3db0acefe60329f044c1789d94c6543"
+checksum = "1a3546dc96b6d42c5f24902af9e2538e82e39ad350b0c766eb3fbf2d8f3d8359"
 dependencies = [
  "jiff-static",
  "log",
@@ -367,9 +355,9 @@ dependencies = [
 
 [[package]]
 name = "jiff-static"
-version = "0.2.20"
+version = "0.2.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f7946b4325269738f270bb55b3c19ab5c5040525f83fd625259422a9d25d9be5"
+checksum = "2a8c8b344124222efd714b73bb41f8b5120b27a7cc1c75593a6ff768d9d05aa4"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -384,15 +372,15 @@ checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
 
 [[package]]
 name = "libc"
-version = "0.2.180"
+version = "0.2.182"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bcc35a38544a891a5f7c865aca548a982ccb3b8650a5b06d0fd33a10283c56fc"
+checksum = "6800badb6cb2082ffd7b6a67e6125bb39f18782f793520caee8cb8846be06112"
 
 [[package]]
 name = "linux-raw-sys"
-version = "0.11.0"
+version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "df1d3c3b53da64cf5760482273a98e575c651a67eec7f77df96b5b642de8f039"
+checksum = "32a66949e030da00e8c7d4434b251670a91556f4144941d37452769c25d58a53"
 
 [[package]]
 name = "log"
@@ -402,9 +390,9 @@ checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
 
 [[package]]
 name = "memchr"
-version = "2.7.6"
+version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f52b00d39961fc5b2736ea853c9cc86238e165017a493d1d5c8eac6bdc4cc273"
+checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
 
 [[package]]
 name = "nix"
@@ -476,18 +464,18 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "1.0.44"
+version = "1.0.45"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "21b2ebcf727b7760c461f091f9f0f539b77b8e87f2fd88131e7f1b433b3cece4"
+checksum = "41f2619966050689382d2b44f664f4bc593e129785a36d6ee376ddf37259b924"
 dependencies = [
  "proc-macro2",
 ]
 
 [[package]]
 name = "r-efi"
-version = "5.3.0"
+version = "6.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
+checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
 
 [[package]]
 name = "rand"
@@ -496,7 +484,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bc266eb313df6c5c09c1c7b1fbe2510961e5bcd3add930c1e31f7ed9da0feff8"
 dependencies = [
  "chacha20",
- "getrandom 0.4.1",
+ "getrandom",
  "rand_core",
 ]
 
@@ -508,9 +496,9 @@ checksum = "0c8d0fd677905edcbeedbf2edb6494d676f0e98d54d5cf9bda0b061cb8fb8aba"
 
 [[package]]
 name = "regex"
-version = "1.12.2"
+version = "1.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "843bc0191f75f3e22651ae5f1e72939ab2f72a4bc30fa80a066bd66edefc24d4"
+checksum = "e10754a14b9137dd7b1e3e5b0493cc9171fdd105e0ab477f51b72e7f3ac0e276"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -520,9 +508,9 @@ dependencies = [
 
 [[package]]
 name = "regex-automata"
-version = "0.4.13"
+version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5276caf25ac86c8d810222b3dbb938e512c55c6831a10f3e6ed1c93b84041f1c"
+checksum = "6e1dd4122fc1595e8162618945476892eefca7b88c52820e74af6262213cae8f"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -531,15 +519,15 @@ dependencies = [
 
 [[package]]
 name = "regex-syntax"
-version = "0.8.8"
+version = "0.8.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a2d987857b319362043e95f5353c0535c1f58eec5336fdfcf626430af7def58"
+checksum = "dc897dd8d9e8bd1ed8cdad82b5966c3e0ecae09fb1907d58efaa013543185d0a"
 
 [[package]]
 name = "rustix"
-version = "1.1.3"
+version = "1.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "146c9e247ccc180c1f61615433868c99f3de3ae256a30a43b49f67c2d9171f34"
+checksum = "b6fe4565b9518b83ef4f91bb47ce29620ca828bd32cb7e408f0062e9930ba190"
 dependencies = [
  "bitflags",
  "errno",
@@ -641,9 +629,9 @@ checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
 [[package]]
 name = "syn"
-version = "2.0.114"
+version = "2.0.117"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d4d107df263a3013ef9b1879b0df87d706ff80f65a86ea879bd9c31f9b307c2a"
+checksum = "e665b8803e7b1d2a727f4023456bbbbe74da67099c585258af0ad9c5013b9b99"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -652,12 +640,12 @@ dependencies = [
 
 [[package]]
 name = "tempfile"
-version = "3.24.0"
+version = "3.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "655da9c7eb6305c55742045d5a8d2037996d61d8de95806335c7c86ce0f82e9c"
+checksum = "82a72c767771b47409d2345987fda8628641887d5466101319899796367354a0"
 dependencies = [
  "fastrand",
- "getrandom 0.3.4",
+ "getrandom",
  "once_cell",
  "rustix",
  "windows-sys 0.61.2",
@@ -665,9 +653,9 @@ dependencies = [
 
 [[package]]
 name = "unicode-ident"
-version = "1.0.22"
+version = "1.0.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9312f7c4f6ff9069b165498234ce8be658059c6728633667c526e27dc2cf1df5"
+checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
 
 [[package]]
 name = "unicode-segmentation"

nix/hm-module.nix

@@ -5,9 +5,17 @@ let
   boolToString = b:
   if b then "true" else "false";
 
-  mkFunctionDef = name: body: ''
+  mkAutoCmd = cfg:
+    map (hook: "autocmd ${hook} ${lib.optionalString (cfg.pattern != null) "-p \"${cfg.pattern}\""} '${cfg.command}'") cfg.hooks;
+
+
+  mkFunctionDef = name: body:
+  let
+    indented = "\t" + lib.concatStringsSep "\n\t" (lib.splitString "\n" body);
+  in
+    ''
 ${name}() {
-${body}
+${indented}
 }'';
 
   mkKeymapCmd = cfg: let
@@ -58,6 +66,36 @@ in
       description = "Shell functions to set when shed starts";
     };
 
+    autocmds = lib.mkOption {
+      type = lib.types.listOf (lib.types.submodule {
+        options = {
+          hooks = lib.mkOption {
+            type = lib.types.addCheck (lib.types.listOf (lib.types.enum [
+              "pre-cmd"
+              "post-cmd"
+              "pre-change-dir"
+              "post-change-dir"
+              "on-job-finish"
+              "pre-prompt"
+              "post-prompt"
+              "pre-mode-change"
+              "post-mode-change"
+            ])) (list: list != []);
+            description = "The events that trigger this autocmd";
+          };
+          pattern = lib.mkOption {
+            type = lib.types.nullOr lib.types.str;
+            default = null;
+            description = "A regex pattern to use in the hook to determine whether it runs or not. What it's compared to differs by hook, for instance 'pre-change-dir' compares it to the new directory, pre-cmd compares it to the command, etc";
+          };
+          command = lib.mkOption {
+            type = lib.types.addCheck lib.types.str (cmd: cmd != "");
+            description = "The shell command to execute when the hook is triggered and the pattern (if provided) matches";
+          };
+        };
+      });
+    };
+
     keymaps = lib.mkOption {
       type = lib.types.listOf (lib.types.submodule {
         options = {
@@ -243,6 +281,7 @@ in
     completeLines = lib.concatLines (lib.mapAttrsToList mkCompleteCmd cfg.extraCompletion);
     keymapLines = lib.concatLines (map mkKeymapCmd cfg.keymaps);
     functionLines = lib.concatLines (lib.mapAttrsToList mkFunctionDef cfg.functions);
+    autocmdLines = lib.concatLines (map mkAutoCmd cfg.autocmds);
   in
   lib.mkIf cfg.enable {
     home.packages = [ cfg.package ];
@@ -269,6 +308,7 @@ in
         functionLines
         completeLines
         keymapLines
+        autocmdLines
       ])
       cfg.settings.extraPostConfig
     ];

src/builtin/autocmd.rs

@@ -0,0 +1,91 @@
+use regex::Regex;
+
+use crate::{
+  getopt::{Opt, OptSpec, get_opts_from_tokens}, libsh::error::{ShErr, ShErrKind, ShResult, ShResultExt}, parse::{NdRule, Node, execute::prepare_argv}, state::{self, AutoCmd, AutoCmdKind, write_logic}
+};
+
+pub struct AutoCmdOpts {
+	pattern: Option<Regex>,
+	clear: bool
+}
+fn autocmd_optspec() -> [OptSpec;2] {
+	[
+		OptSpec {
+			opt: Opt::Short('p'),
+			takes_arg: true
+		},
+		OptSpec {
+			opt: Opt::Short('c'),
+			takes_arg: false
+		}
+	]
+}
+
+pub fn get_autocmd_opts(opts: &[Opt]) -> ShResult<AutoCmdOpts> {
+	let mut autocmd_opts = AutoCmdOpts {
+		pattern: None,
+		clear: false
+	};
+
+	let mut opts = opts.iter();
+	while let Some(arg) = opts.next() {
+		match arg {
+			Opt::ShortWithArg('p', arg) => {
+				autocmd_opts.pattern = Some(Regex::new(arg).map_err(|e| ShErr::simple(ShErrKind::ExecFail, format!("invalid regex for -p: {}", e)))?);
+			}
+			Opt::Short('c') => {
+				autocmd_opts.clear = true;
+			}
+			_ => {
+				return Err(ShErr::simple(ShErrKind::ExecFail, format!("unexpected option: {}", arg)));
+			}
+		}
+	}
+
+	Ok(autocmd_opts)
+}
+
+pub fn autocmd(node: Node) -> ShResult<()> {
+  let span = node.get_span();
+  let NdRule::Command {
+    assignments: _,
+    argv,
+  } = node.class
+  else {
+    unreachable!()
+  };
+
+	let (argv,opts) = get_opts_from_tokens(argv, &autocmd_optspec()).promote_err(span.clone())?;
+	let autocmd_opts = get_autocmd_opts(&opts).promote_err(span.clone())?;
+  let mut argv = prepare_argv(argv)?;
+  if !argv.is_empty() { argv.remove(0); }
+	let mut args = argv.iter();
+
+	let Some(autocmd_kind) = args.next() else {
+		return Err(ShErr::at(ShErrKind::ExecFail, span, "expected an autocmd kind".to_string()));
+	};
+
+	let Ok(autocmd_kind) = autocmd_kind.0.parse::<AutoCmdKind>() else {
+		return Err(ShErr::at(ShErrKind::ExecFail, autocmd_kind.1.clone(), format!("invalid autocmd kind: {}", autocmd_kind.0)));
+	};
+
+	if autocmd_opts.clear {
+		write_logic(|l| l.clear_autocmds(autocmd_kind));
+		state::set_status(0);
+		return Ok(());
+	}
+
+	let Some(autocmd_cmd) = args.next() else {
+		return Err(ShErr::at(ShErrKind::ExecFail, span, "expected an autocmd command".to_string()));
+	};
+
+	let autocmd = AutoCmd {
+		pattern: autocmd_opts.pattern,
+		command: autocmd_cmd.0.clone(),
+	};
+
+	write_logic(|l| l.insert_autocmd(autocmd_kind, autocmd));
+
+  state::set_status(0);
+  Ok(())
+}

src/builtin/cd.rs

@@ -44,7 +44,7 @@ pub fn cd(node: Node) -> ShResult<()> {
       .labeled(cd_span.clone(), format!("cd: Not a directory '{}'", new_dir.display().fg(next_color()))));
   }
 
-  if let Err(e) = env::set_current_dir(new_dir) {
+  if let Err(e) = state::change_dir(new_dir) {
     return Err(ShErr::new(ShErrKind::ExecFail, span.clone())
       .labeled(cd_span.clone(), format!("cd: Failed to change directory: '{}'", e.fg(Color::Red))));
   }

src/builtin/dirstack.rs

@@ -52,7 +52,7 @@ fn change_directory(target: &PathBuf, blame: Span) -> ShResult<()> {
     );
   }
 
-  if let Err(e) = env::set_current_dir(target) {
+  if let Err(e) = state::change_dir(target) {
     return Err(
       ShErr::at(ShErrKind::ExecFail, blame, format!("Failed to change directory: '{}'", e.fg(Color::Red)))
     );

src/builtin/keymap.rs

@@ -1,5 +1,5 @@
 use crate::{
-  expand::expand_keymap, getopt::{Opt, OptSpec, get_opts_from_tokens}, libsh::error::{ShErr, ShErrKind, ShResult, ShResultExt}, parse::{NdRule, Node, execute::prepare_argv}, prelude::*, readline::{keys::KeyEvent, vimode::ModeReport}, state::{self, write_logic}
+  expand::expand_keymap, getopt::{Opt, OptSpec, get_opts_from_tokens}, libsh::error::{ShErr, ShErrKind, ShResult, ShResultExt}, parse::{NdRule, Node, execute::prepare_argv}, prelude::*, readline::keys::KeyEvent, state::{self, write_logic}
 };
 
 bitflags! {

src/builtin/mod.rs

@@ -26,13 +26,14 @@ pub mod arrops;
 pub mod intro;
 pub mod getopts;
 pub mod keymap;
+pub mod autocmd;
 
-pub const BUILTINS: [&str; 46] = [
+pub const BUILTINS: [&str; 47] = [
   "echo", "cd", "read", "export", "local", "pwd", "source", "shift", "jobs", "fg", "bg", "disown",
   "alias", "unalias", "return", "break", "continue", "exit", "zoltraak", "shopt", "builtin",
   "command", "trap", "pushd", "popd", "dirs", "exec", "eval", "true", "false", ":", "readonly",
   "unset", "complete", "compgen", "map", "pop", "fpop", "push", "fpush", "rotate", "wait", "type",
-	"getopts", "keymap", "read_key"
+	"getopts", "keymap", "read_key", "autocmd"
 ];
 
 pub fn true_builtin() -> ShResult<()> {

src/builtin/read.rs

@@ -4,7 +4,6 @@ use nix::{
   libc::{STDIN_FILENO, STDOUT_FILENO},
   unistd::{isatty, read, write},
 };
-use yansi::Paint;
 
 use crate::{
   expand::expand_keymap, getopt::{Opt, OptSpec, get_opts_from_tokens}, libsh::{error::{ShErr, ShErrKind, ShResult, ShResultExt}, sys::TTY_FILENO}, parse::{NdRule, Node, execute::prepare_argv}, procio::borrow_fd, readline::term::{KeyReader, PollReader, RawModeGuard}, state::{self, VarFlags, VarKind, read_vars, write_vars}

src/libsh/utils.rs

@@ -2,9 +2,11 @@ use std::collections::VecDeque;
 
 use ariadne::Span as AriadneSpan;
 
+use crate::parse::execute::exec_input;
 use crate::parse::lex::{Span, Tk, TkRule};
 use crate::parse::{Node, Redir, RedirType};
 use crate::prelude::*;
+use crate::state::AutoCmd;
 
 pub trait VecDequeExt<T> {
   fn to_vec(self) -> Vec<T>;
@@ -22,6 +24,11 @@ pub trait TkVecUtils<Tk> {
   fn split_at_separators(&self) -> Vec<Vec<Tk>>;
 }
 
+pub trait AutoCmdVecUtils {
+	fn exec(&self);
+	fn exec_with(&self, pattern: &str);
+}
+
 pub trait RedirVecUtils<Redir> {
   /// Splits the vector of redirections into two vectors
   ///
@@ -33,6 +40,31 @@ pub trait NodeVecUtils<Node> {
 	fn get_span(&self) -> Option<Span>;
 }
 
+impl AutoCmdVecUtils for Vec<AutoCmd> {
+	fn exec(&self) {
+		for cmd in self {
+			let AutoCmd { pattern: _, command } = cmd;
+			if let Err(e) = exec_input(command.clone(), None, false, Some("autocmd".into())) {
+				e.print_error();
+			}
+		}
+	}
+	fn exec_with(&self, other_pattern: &str) {
+		for cmd in self {
+			let AutoCmd { pattern, command } = cmd;
+			if let Some(pat) = pattern
+			&& !pat.is_match(other_pattern) {
+				log::trace!("autocmd pattern '{}' did not match '{}', skipping", pat, other_pattern);
+				continue;
+			}
+
+			if let Err(e) = exec_input(command.clone(), None, false, Some("autocmd".into())) {
+				e.print_error();
+			}
+		}
+	}
+}
+
 impl<T> VecDequeExt<T> for VecDeque<T> {
   fn to_vec(self) -> Vec<T> {
     self.into_iter().collect::<Vec<T>>()

src/main.rs

@@ -31,12 +31,13 @@ use crate::builtin::keymap::KeyMapMatch;
 use crate::builtin::trap::TrapTarget;
 use crate::libsh::error::{self, ShErr, ShErrKind, ShResult};
 use crate::libsh::sys::TTY_FILENO;
+use crate::libsh::utils::AutoCmdVecUtils;
 use crate::parse::execute::exec_input;
 use crate::prelude::*;
 use crate::readline::term::{LineWriter, RawModeGuard, raw_mode};
 use crate::readline::{Prompt, ReadlineEvent, ShedVi};
 use crate::signal::{GOT_SIGWINCH, JOB_DONE, QUIT_CODE, check_signals, sig_setup, signals_pending};
-use crate::state::{read_logic, source_rc, write_jobs, write_meta};
+use crate::state::{AutoCmdKind, read_logic, source_rc, write_jobs, write_meta};
 use clap::Parser;
 use state::{read_vars, write_vars};
 
@@ -357,9 +358,14 @@ fn shed_interactive(args: ShedArgs) -> ShResult<()> {
     // Process any available input
     match readline.process_input() {
       Ok(ReadlineEvent::Line(input)) => {
+				let pre_exec = read_logic(|l| l.get_autocmds(AutoCmdKind::PreCmd));
+				let post_exec = read_logic(|l| l.get_autocmds(AutoCmdKind::PostCmd));
+
+				pre_exec.exec_with(&input);
+
         let start = Instant::now();
         write_meta(|m| m.start_timer());
-        if let Err(e) = RawModeGuard::with_cooked_mode(|| exec_input(input, None, true, Some("<stdin>".into()))) {
+        if let Err(e) = RawModeGuard::with_cooked_mode(|| exec_input(input.clone(), None, true, Some("<stdin>".into()))) {
           match e.kind() {
             ShErrKind::CleanExit(code) => {
               QUIT_CODE.store(*code, Ordering::SeqCst);
@@ -371,6 +377,9 @@ fn shed_interactive(args: ShedArgs) -> ShResult<()> {
         let command_run_time = start.elapsed();
         log::info!("Command executed in {:.2?}", command_run_time);
         write_meta(|m| m.stop_timer());
+
+				post_exec.exec_with(&input);
+
 				readline.fix_column()?;
 				readline.writer.flush_write("\n\r")?;
 

src/parse/execute.rs

@@ -7,9 +7,9 @@ use ariadne::Fmt;
 
 use crate::{
   builtin::{
-    alias::{alias, unalias}, arrops::{arr_fpop, arr_fpush, arr_pop, arr_push, arr_rotate}, cd::cd, complete::{compgen_builtin, complete_builtin}, dirstack::{dirs, popd, pushd}, echo::echo, eval, exec, flowctl::flowctl, getopts::getopts, intro, jobctl::{self, JobBehavior, continue_job, disown, jobs}, keymap, map, pwd::pwd, read::{self, read_builtin}, shift::shift, shopt::shopt, source::source, test::double_bracket_test, trap::{TrapTarget, trap}, varcmds::{export, local, readonly, unset}, zoltraak::zoltraak
+    alias::{alias, unalias}, arrops::{arr_fpop, arr_fpush, arr_pop, arr_push, arr_rotate}, autocmd::autocmd, cd::cd, complete::{compgen_builtin, complete_builtin}, dirstack::{dirs, popd, pushd}, echo::echo, eval, exec, flowctl::flowctl, getopts::getopts, intro, jobctl::{self, JobBehavior, continue_job, disown, jobs}, keymap, map, pwd::pwd, read::{self, read_builtin}, shift::shift, shopt::shopt, source::source, test::double_bracket_test, trap::{TrapTarget, trap}, varcmds::{export, local, readonly, unset}, zoltraak::zoltraak
   },
-  expand::{expand_aliases, glob_to_regex},
+  expand::{Expander, expand_aliases, expand_raw, glob_to_regex},
   jobs::{ChildProc, JobStack, attach_tty, dispatch_job},
   libsh::{
     error::{ShErr, ShErrKind, ShResult, ShResultExt, next_color},
@@ -19,7 +19,7 @@ use crate::{
   prelude::*,
   procio::{IoMode, IoStack},
   state::{
-    self, ShFunc, VarFlags, VarKind, read_logic, read_shopts, write_jobs, write_logic, write_vars,
+    self, ShFunc, VarFlags, VarKind, read_logic, read_shopts, write_jobs, write_logic, write_vars
   },
 };
 
@@ -429,10 +429,13 @@ impl Dispatcher {
         let block_patterns = block_pattern_raw.split('|');
 
         for pattern in block_patterns {
-          let pattern_regex = glob_to_regex(pattern, false);
+					log::debug!("[case] testing pattern {:?} against input {:?}", pattern, pattern_raw);
-          log::debug!("[case] testing input {:?} against pattern {:?} (regex: {:?})", pattern_raw, pattern, pattern_regex);
+					let pattern_exp = Expander::from_raw(pattern)?.expand()?.join(" ");
+					log::debug!("[case] expanded pattern: {:?}", pattern_exp);
+          let pattern_regex = glob_to_regex(&pattern_exp, false);
+          log::debug!("[case] testing input {:?} against pattern {:?} (regex: {:?})", pattern_raw, pattern_exp, pattern_regex);
           if pattern_regex.is_match(&pattern_raw) {
-            log::debug!("[case] matched pattern {:?}", pattern);
+            log::debug!("[case] matched pattern {:?}", pattern_exp);
             for node in &body {
               s.dispatch_node(node.clone())?;
             }
@@ -828,6 +831,7 @@ impl Dispatcher {
 			"getopts" => getopts(cmd),
 			"keymap" => keymap::keymap(cmd),
 			"read_key" => read::read_key(cmd),
+			"autocmd" => autocmd(cmd),
       "true" | ":" => {
         state::set_status(0);
         Ok(())

src/readline/complete.rs

@@ -3,7 +3,6 @@ use std::{
 };
 
 use nix::sys::signal::Signal;
-use unicode_width::UnicodeWidthStr;
 
 use crate::{
   builtin::complete::{CompFlags, CompOptFlags, CompOpts},
@@ -823,13 +822,13 @@ impl Completer for FuzzyCompleter {
 			}
 			K(C::Tab, M::SHIFT) |
 			K(C::Up, M::NONE) => {
-				self.cursor.sub(1);
+				self.cursor.wrap_sub(1);
 				self.update_scroll_offset();
 				Ok(CompResponse::Consumed)
 			}
 			K(C::Tab, M::NONE) |
 			K(C::Down, M::NONE) => {
-				self.cursor.add(1);
+				self.cursor.wrap_add(1);
 				self.update_scroll_offset();
 				Ok(CompResponse::Consumed)
 			}
@@ -848,7 +847,7 @@ impl Completer for FuzzyCompleter {
 			// soft wraps and re-wraps as a flat buffer.
 			let total_cells = layout.rows as u32 * layout.cols as u32;
 			let physical_rows = if new_cols > 0 {
-				((total_cells + new_cols as u32 - 1) / new_cols as u32) as u16
+				total_cells.div_ceil(new_cols as u32) as u16
 			} else {
 				layout.rows
 			};
@@ -864,8 +863,7 @@ impl Completer for FuzzyCompleter {
 			// filling to t_cols). Compute how many extra rows that adds
 			// between the prompt cursor and the fuzzy content.
 			let gap_extra = if new_cols > 0 && layout.preceding_line_width > new_cols {
-				let wrap_rows = ((layout.preceding_line_width as u32 + new_cols as u32 - 1)
+				let wrap_rows = (layout.preceding_line_width as u32).div_ceil(new_cols as u32) as u16;
-					/ new_cols as u32) as u16;
 				let cursor_wrap_row = layout.preceding_cursor_col / new_cols;
 				wrap_rows.saturating_sub(cursor_wrap_row + 1)
 			} else {
@@ -975,7 +973,7 @@ impl Completer for FuzzyCompleter {
 
 		let new_layout = FuzzyLayout {
 			rows,
-			cols: cols as u16,
+			cols,
 			cursor_col,
 			preceding_line_width: self.prompt_line_width,
 			preceding_cursor_col: self.prompt_cursor_col,

src/readline/linebuf.rs

@@ -18,7 +18,7 @@ use crate::{
     register::{RegisterContent, write_register},
     term::RawModeGuard,
   },
-  state::{VarFlags, VarKind, read_shopts, read_vars, write_meta, write_vars},
+  state::{VarFlags, VarKind, read_shopts, write_meta, write_vars},
 };
 
 const PUNCTUATION: [&str; 3] = ["?", "!", "."];
@@ -297,6 +297,20 @@ impl ClampedUsize {
   pub fn sub(&mut self, value: usize) {
     self.value = self.value.saturating_sub(value)
   }
+	pub fn wrap_add(&mut self, value: usize) {
+		self.value = self.ret_wrap_add(value);
+	}
+	pub fn wrap_sub(&mut self, value: usize) {
+		self.value = self.ret_wrap_sub(value);
+	}
+	pub fn ret_wrap_add(&self, value: usize) -> usize {
+		let max = self.upper_bound();
+		(self.value + value) % (max + 1)
+	}
+	pub fn ret_wrap_sub(&self, value: usize) -> usize {
+		let max = self.upper_bound();
+		(self.value + (max + 1) - (value % (max + 1))) % (max + 1)
+	}
   /// Add a value to the wrapped usize, return the result
   ///
   /// Returns the result instead of mutating the inner value
@@ -2774,7 +2788,7 @@ impl LineBuf {
         match content {
           RegisterContent::Span(ref text) => {
             let insert_idx = match anchor {
-              Anchor::After => self.cursor.ret_add(1),
+              Anchor::After => self.cursor.get().saturating_add(1).min(self.grapheme_indices().len()),
               Anchor::Before => self.cursor.get(),
             };
             self.insert_str_at(insert_idx, text);

src/readline/mod.rs

@@ -10,12 +10,13 @@ use vimode::{CmdReplay, ModeReport, ViInsert, ViMode, ViNormal, ViReplace, ViVis
 use crate::builtin::keymap::{KeyMapFlags, KeyMapMatch};
 use crate::expand::expand_prompt;
 use crate::libsh::sys::TTY_FILENO;
+use crate::libsh::utils::AutoCmdVecUtils;
 use crate::parse::lex::{LexStream, QuoteState};
 use crate::{prelude::*, state};
 use crate::readline::complete::FuzzyCompleter;
 use crate::readline::term::{Pos, TermReader, calc_str_width};
 use crate::readline::vimode::ViEx;
-use crate::state::{ShellParam, read_logic, read_shopts, write_meta};
+use crate::state::{AutoCmdKind, ShellParam, VarFlags, VarKind, read_logic, read_shopts, with_vars, write_meta, write_vars};
 use crate::{
   libsh::error::ShResult,
   parse::lex::{self, LexFlags, Tk, TkFlags, TkRule},
@@ -251,6 +252,8 @@ impl ShedVi {
       history: History::new()?,
       needs_redraw: true,
     };
+		write_vars(|v| v.set_var("SHED_VI_MODE", VarKind::Str(new.mode.report_mode().to_string()), VarFlags::NONE))?;
+		new.prompt.refresh()?;
     new.writer.flush_write("\n")?; // ensure we start on a new line, in case the previous command didn't end with a newline
     new.print_line(false)?;
     Ok(new)
@@ -716,6 +719,9 @@ impl ShedVi {
       self.writer.clear_rows(layout)?;
     }
 
+		let pre_prompt = read_logic(|l| l.get_autocmds(AutoCmdKind::PrePrompt));
+		pre_prompt.exec();
+
     self
       .writer
       .redraw(self.prompt.get_ps1(), &line, &new_layout)?;
@@ -786,15 +792,28 @@ impl ShedVi {
 
     self.old_layout = Some(new_layout);
     self.needs_redraw = false;
-    // Save physical cursor row so SIGWINCH can restore it
+
+		let post_prompt = read_logic(|l| l.get_autocmds(AutoCmdKind::PostPrompt));
+		post_prompt.exec();
+
     Ok(())
   }
 
+	pub fn swap_mode(&mut self, mode: &mut Box<dyn ViMode>) {
+		std::mem::swap(&mut self.mode, mode);
+		self.editor.set_cursor_clamp(self.mode.clamp_cursor());
+		write_vars(|v| v.set_var("SHED_VI_MODE", VarKind::Str(self.mode.report_mode().to_string()), VarFlags::NONE)).ok();
+		self.prompt.refresh().ok();
+	}
+
   pub fn exec_cmd(&mut self, mut cmd: ViCmd) -> ShResult<()> {
     let mut select_mode = None;
     let mut is_insert_mode = false;
     if cmd.is_mode_transition() {
       let count = cmd.verb_count();
+			let pre_mode_change = read_logic(|l| l.get_autocmds(AutoCmdKind::PreModeChange));
+			pre_mode_change.exec();
+
       let mut mode: Box<dyn ViMode> = if let ModeReport::Ex = self.mode.report_mode() && cmd.flags.contains(CmdFlags::EXIT_CUR_MODE) {
 				if let Some(saved) = self.saved_mode.take() {
 					saved
@@ -823,8 +842,7 @@ impl ShedVi {
 								.start_selecting(SelectMode::Char(SelectAnchor::End));
 						}
 						let mut mode: Box<dyn ViMode> = Box::new(ViVisual::new());
-						std::mem::swap(&mut mode, &mut self.mode);
+						self.swap_mode(&mut mode);
-						self.editor.set_cursor_clamp(self.mode.clamp_cursor());
 
 						return self.editor.exec_cmd(cmd);
 					}
@@ -842,10 +860,12 @@ impl ShedVi {
 			};
 
 
-      std::mem::swap(&mut mode, &mut self.mode);
+			self.swap_mode(&mut mode);
 
 			if self.mode.report_mode() == ModeReport::Ex {
 				self.saved_mode = Some(mode);
+				write_vars(|v| v.set_var("SHED_VI_MODE", VarKind::Str(self.mode.report_mode().to_string()), VarFlags::NONE))?;
+				self.prompt.refresh()?;
 				return Ok(());
 			}
 
@@ -868,6 +888,13 @@ impl ShedVi {
       } else {
         self.editor.clear_insert_mode_start_pos();
       }
+
+			write_vars(|v| v.set_var("SHED_VI_MODE", VarKind::Str(self.mode.report_mode().to_string()), VarFlags::NONE))?;
+			self.prompt.refresh()?;
+
+			let post_mode_change = read_logic(|l| l.get_autocmds(AutoCmdKind::PostModeChange));
+			post_mode_change.exec();
+
       return Ok(());
     } else if cmd.is_cmd_repeat() {
       let Some(replay) = self.repeat_action.clone() else {
@@ -945,7 +972,7 @@ impl ShedVi {
 		&& self.editor.select_range().is_none() {
 			self.editor.stop_selecting();
 			let mut mode: Box<dyn ViMode> = Box::new(ViNormal::new());
-			std::mem::swap(&mut mode, &mut self.mode);
+			self.swap_mode(&mut mode);
 		}
 
     if cmd.is_repeatable() {
@@ -970,7 +997,7 @@ impl ShedVi {
     if self.mode.report_mode() == ModeReport::Visual && cmd.verb().is_some_and(|v| v.1.is_edit()) {
       self.editor.stop_selecting();
       let mut mode: Box<dyn ViMode> = Box::new(ViNormal::new());
-      std::mem::swap(&mut mode, &mut self.mode);
+			self.swap_mode(&mut mode);
     }
 
 		if self.mode.report_mode() != ModeReport::Visual && self.editor.select_range().is_some() {
@@ -987,8 +1014,7 @@ impl ShedVi {
 			} else {
 				Box::new(ViNormal::new())
 			};
-      std::mem::swap(&mut mode, &mut self.mode);
+			self.swap_mode(&mut mode);
-      self.editor.set_cursor_clamp(self.mode.clamp_cursor());
     }
 
     Ok(())

src/readline/vimode/mod.rs

@@ -1,3 +1,5 @@
+use std::fmt::Display;
+
 use unicode_segmentation::UnicodeSegmentation;
 
 use crate::libsh::error::ShResult;
@@ -28,6 +30,19 @@ pub enum ModeReport {
   Unknown,
 }
 
+impl Display for ModeReport {
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+		match self {
+			ModeReport::Insert => write!(f, "INSERT"),
+			ModeReport::Normal => write!(f, "NORMAL"),
+			ModeReport::Ex => write!(f, "COMMAND"),
+			ModeReport::Visual => write!(f, "VISUAL"),
+			ModeReport::Replace => write!(f, "REPLACE"),
+			ModeReport::Unknown => write!(f, "UNKNOWN"),
+		}
+	}
+}
+
 #[derive(Debug, Clone)]
 pub enum CmdReplay {
   ModeReplay { cmds: Vec<ViCmd>, repeat: u16 },

src/signal.rs

@@ -8,7 +8,7 @@ use crate::{
   libsh::error::{ShErr, ShErrKind, ShResult},
   parse::execute::exec_input,
   prelude::*,
-  state::{read_jobs, read_logic, write_jobs, write_meta},
+  state::{AutoCmd, AutoCmdKind, read_jobs, read_logic, write_jobs, write_meta},
 };
 
 static SIGNALS: AtomicU64 = AtomicU64::new(0);
@@ -150,7 +150,7 @@ pub fn sig_setup(is_login: bool) {
 
 
     if is_login {
-        setpgid(Pid::from_raw(0), Pid::from_raw(0));
+        let _ = setpgid(Pid::from_raw(0), Pid::from_raw(0));
         take_term().ok();
     }
 }
@@ -307,15 +307,29 @@ pub fn child_exited(pid: Pid, status: WtStat) -> ShResult<()> {
   {
     if is_fg {
       take_term()?;
-    } else {
+		} else {
-      JOB_DONE.store(true, Ordering::SeqCst);
+			JOB_DONE.store(true, Ordering::SeqCst);
-      let job_order = read_jobs(|j| j.order().to_vec());
+			let job_order = read_jobs(|j| j.order().to_vec());
-      let result = read_jobs(|j| j.query(JobID::Pgid(pgid)).cloned());
+			let result = read_jobs(|j| j.query(JobID::Pgid(pgid)).cloned());
-      if let Some(job) = result {
+			if let Some(job) = result {
-        let job_complete_msg = job.display(&job_order, JobCmdFlags::PIDS).to_string();
+				let job_complete_msg = job.display(&job_order, JobCmdFlags::PIDS).to_string();
-        write_meta(|m| m.post_system_message(job_complete_msg))
+
-      }
+				let post_job_hooks = read_logic(|l| l.get_autocmds(AutoCmdKind::OnJobFinish));
-    }
+				for cmd in post_job_hooks {
+					let AutoCmd { pattern, command } = cmd;
+					if let Some(pat) = pattern
+					&& job.get_cmds().iter().all(|p| !pat.is_match(p)) {
+						continue;
+					}
+
+					if let Err(e) = exec_input(command.clone(), None, false, Some("autocmd".into())) {
+						e.print_error();
+					}
+				}
+
+				write_meta(|m| m.post_system_message(job_complete_msg))
+			}
+		}
   }
   Ok(())
 }

src/state.rs

@@ -9,11 +9,11 @@ use std::{
 };
 
 use nix::unistd::{User, gethostname, getppid};
+use regex::Regex;
 
 use crate::{
   builtin::{BUILTINS, keymap::{KeyMap, KeyMapFlags, KeyMapMatch}, map::MapNode, trap::TrapTarget}, exec_input, expand::expand_keymap, jobs::JobTab, libsh::{
-    error::{ShErr, ShErrKind, ShResult},
+    error::{ShErr, ShErrKind, ShResult}, utils::VecDequeExt
-    utils::VecDequeExt,
   }, parse::{
     ConjunctNode, NdRule, Node, ParsedSrc,
     lex::{LexFlags, LexStream, Span, Tk},
@@ -522,6 +522,62 @@ impl ShFunc {
   }
 }
 
+#[derive(Clone, Debug, Eq, PartialEq, Hash)]
+pub enum AutoCmdKind {
+	PreCmd,
+	PostCmd,
+	PreChangeDir,
+	PostChangeDir,
+	OnJobFinish,
+	PrePrompt,
+	PostPrompt,
+	PreModeChange,
+	PostModeChange
+}
+
+impl Display for AutoCmdKind {
+	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+		match self {
+			Self::PreCmd => write!(f, "pre-cmd"),
+			Self::PostCmd => write!(f, "post-cmd"),
+			Self::PreChangeDir => write!(f, "pre-change-dir"),
+			Self::PostChangeDir => write!(f, "post-change-dir"),
+			Self::OnJobFinish => write!(f, "on-job-finish"),
+			Self::PrePrompt => write!(f, "pre-prompt"),
+			Self::PostPrompt => write!(f, "post-prompt"),
+			Self::PreModeChange => write!(f, "pre-mode-change"),
+			Self::PostModeChange => write!(f, "post-mode-change"),
+		}
+	}
+}
+
+impl FromStr for AutoCmdKind {
+	type Err = ShErr;
+	fn from_str(s: &str) -> Result<Self, Self::Err> {
+		match s {
+			"pre-cmd" => Ok(Self::PreCmd),
+			"post-cmd" => Ok(Self::PostCmd),
+			"pre-change-dir" => Ok(Self::PreChangeDir),
+			"post-change-dir" => Ok(Self::PostChangeDir),
+			"on-job-finish" => Ok(Self::OnJobFinish),
+			"pre-prompt" => Ok(Self::PrePrompt),
+			"post-prompt" => Ok(Self::PostPrompt),
+			"pre-mode-change" => Ok(Self::PreModeChange),
+			"post-mode-change" => Ok(Self::PostModeChange),
+			_ => Err(ShErr::simple(
+				ShErrKind::ParseErr,
+				format!("Invalid autocmd kind: {}", s),
+			)),
+		}
+	}
+}
+
+#[derive(Clone, Debug)]
+pub struct AutoCmd {
+	pub pattern: Option<Regex>,
+	pub command: String,
+}
+
 /// The logic table for the shell
 ///
 /// Contains aliases and functions
@@ -530,13 +586,35 @@ pub struct LogTab {
   functions: HashMap<String, ShFunc>,
   aliases: HashMap<String, ShAlias>,
   traps: HashMap<TrapTarget, String>,
-	keymaps: Vec<KeyMap>
+	keymaps: Vec<KeyMap>,
+	autocmds: HashMap<AutoCmdKind, Vec<AutoCmd>>
 }
 
 impl LogTab {
   pub fn new() -> Self {
     Self::default()
   }
+	pub fn autocmds(&self) -> &HashMap<AutoCmdKind, Vec<AutoCmd>> {
+		&self.autocmds
+	}
+	pub fn autocmds_mut(&mut self) -> &mut HashMap<AutoCmdKind, Vec<AutoCmd>> {
+		&mut self.autocmds
+	}
+	pub fn insert_autocmd(&mut self, kind: AutoCmdKind, cmd: AutoCmd) {
+		self.autocmds.entry(kind).or_default().push(cmd);
+	}
+	pub fn get_autocmds(&self, kind: AutoCmdKind) -> Vec<AutoCmd> {
+		self.autocmds.get(&kind).cloned().unwrap_or_default()
+	}
+	pub fn clear_autocmds(&mut self, kind: AutoCmdKind) {
+		self.autocmds.remove(&kind);
+	}
+	pub fn keymaps(&self) -> &Vec<KeyMap> {
+		&self.keymaps
+	}
+	pub fn keymaps_mut(&mut self) -> &mut Vec<KeyMap> {
+		&mut self.keymaps
+	}
 	pub fn insert_keymap(&mut self, keymap: KeyMap) {
 		let mut found_dup = false;
 		for map in self.keymaps.iter_mut() {
@@ -797,6 +875,18 @@ impl Display for Var {
   }
 }
 
+impl From<String> for Var {
+	fn from(value: String) -> Self {
+		Self::new(VarKind::Str(value), VarFlags::NONE)
+	}
+}
+
+impl From<&str> for Var {
+	fn from(value: &str) -> Self {
+		Self::new(VarKind::Str(value.into()), VarFlags::NONE)
+	}
+}
+
 #[derive(Default, Clone, Debug)]
 pub struct VarTab {
   vars: HashMap<String, Var>,
@@ -1496,6 +1586,65 @@ pub fn get_shopt(path: &str) -> String {
   read_shopts(|s| s.get(path)).unwrap().unwrap()
 }
 
+pub fn with_vars<F,H,V,T>(vars: H, f: F) -> T
+where
+	F: FnOnce() -> T,
+	H: Into<HashMap<String,V>>,
+	V: Into<Var> {
+
+	let snapshot = read_vars(|v| v.clone());
+	let vars = vars.into();
+	for (name, val) in vars {
+		let val = val.into();
+		write_vars(|v| v.set_var(&name, val.kind, val.flags).unwrap());
+	}
+	let _guard = scopeguard::guard(snapshot, |snap| {
+		write_vars(|v| *v = snap);
+	});
+	f()
+}
+
+pub fn change_dir<P: AsRef<Path>>(dir: P) -> ShResult<()> {
+	let dir = dir.as_ref();
+	let dir_raw = &dir.display().to_string();
+	let pre_cd = read_logic(|l| l.get_autocmds(AutoCmdKind::PreChangeDir));
+	let post_cd = read_logic(|l| l.get_autocmds(AutoCmdKind::PostChangeDir));
+
+	let current_dir = env::current_dir()?.display().to_string();
+	with_vars([("_NEW_DIR".into(), dir_raw.as_str()), ("_OLD_DIR".into(), current_dir.as_str())], || {
+		for cmd in pre_cd {
+			let AutoCmd { command, pattern } = cmd;
+			if let Some(pat) = pattern
+			&& !pat.is_match(dir_raw) {
+				continue;
+			}
+
+			if let Err(e) = exec_input(command.clone(), None, false, Some("autocmd (pre-changedir)".to_string())) {
+				e.print_error();
+			};
+		}
+	});
+
+
+	env::set_current_dir(dir)?;
+
+	with_vars([("_NEW_DIR".into(), dir_raw.as_str()), ("_OLD_DIR".into(), current_dir.as_str())], || {
+		for cmd in post_cd {
+			let AutoCmd { command, pattern } = cmd;
+			if let Some(pat) = pattern
+			&& !pat.is_match(dir_raw) {
+				continue;
+			}
+
+			if let Err(e) = exec_input(command.clone(), None, false, Some("autocmd (post-changedir)".to_string())) {
+				e.print_error();
+			};
+		}
+	});
+
+	Ok(())
+}
+
 pub fn get_status() -> i32 {
   read_vars(|v| v.get_param(ShellParam::Status))
     .parse::<i32>()