refactor: get zine watcher to build in flow

src/buffer/Manager.zig

@@ -241,3 +241,22 @@ pub fn buffer_from_ref(self: *Self, buffer_ref: usize) ?*Buffer {
 pub fn buffer_to_ref(_: *Self, buffer: *Buffer) usize {
     return @intFromPtr(buffer);
 }
+
+const watcher = @import("watcher");
+
+pub fn watch_all_buffers(self: *Self) watcher.Error!void {
+    var debouncer: watcher.Debouncer = .{};
+    var buffers: std.ArrayList([]const u8) = .empty;
+    var iter = self.buffers.keyIterator();
+    while (iter.next()) |key| {
+        (try buffers.addOne(self.allocator)).* = key.*;
+    }
+
+    var watcher_: watcher.Watcher = try .init(
+        self.allocator,
+        &debouncer,
+        &.{}, // dirs_to_watch.items,
+    );
+
+    try watcher_.start();
+}

src/tui/mainview.zig

@@ -1401,6 +1401,15 @@ const cmds = struct {
         } else return error.InvalidSwapTabsArgument;
     }
     pub const place_next_tab_meta: Meta = .{ .arguments = &.{ .string, .integer } };
+
+    pub fn enable_file_watcher(self: *Self, _: Ctx) Result {
+        self.buffer_manager.watch_all_buffers() catch |e| {
+            const logger = log.logger("watcher");
+            defer logger.deinit();
+            logger.print_err("watcher", "failed to watch all buffes: {s}", .{@errorName(e)});
+        };
+    }
+    pub const enable_file_watcher_meta: Meta = .{ .description = "Enable file watcher" };
 };
 
 pub fn handle_editor_event(self: *Self, _: tp.pid_ref, m: tp.message) tp.result {

src/watcher/Debouncer.zig

@@ -0,0 +1,8 @@
+const std = @import("std");
+
+const Debouncer = @This();
+
+/// Thread-safe. To be called when a new event comes in
+pub fn newEvent(d: *Debouncer) void {
+    _ = d;
+}

src/watcher/LinuxWatcher.zig

@@ -1,8 +1,8 @@
 const LinuxWatcher = @This();
 
 const std = @import("std");
-const fatal = @import("../../../fatal.zig");
-const Debouncer = @import("../../serve.zig").Debouncer;
+const Debouncer = @import("Debouncer.zig");
+const Error = @import("root.zig").Error;
 const Allocator = std.mem.Allocator;
 
 const log = std.log.scoped(.watcher);
@@ -30,11 +30,7 @@ pub fn init(
     gpa: std.mem.Allocator,
     debouncer: *Debouncer,
     dir_paths: []const []const u8,
-) LinuxWatcher {
-    errdefer |err| fatal.msg("error: unable to start the file watcher: {s}", .{
-        @errorName(err),
-    });
-
+) Error!LinuxWatcher {
     const notify_fd = try std.posix.inotify_init1(0);
     var watcher: LinuxWatcher = .{
         .gpa = gpa,
@@ -300,7 +296,7 @@ pub fn listen(watcher: *LinuxWatcher) !void {
 
         var event_data = buffer[0..len];
         while (event_data.len > 0) {
-            const event: *Event = @alignCast(@ptrCast(event_data[0..event_size]));
+            const event: *Event = @ptrCast(@alignCast(event_data[0..event_size]));
             const parent = watcher.watch_fds.get(event.wd).?;
             event_data = event_data[event_size + event.len ..];
 

src/watcher/MacosWatcher.zig

@@ -1,8 +1,7 @@
 const MacosWatcher = @This();
 
 const std = @import("std");
-const fatal = @import("../../../fatal.zig");
-const Debouncer = @import("../../serve.zig").Debouncer;
+const Debouncer = @import("Debouncer.zig");
 
 const c = @cImport({
     @cInclude("CoreServices/CoreServices.h");
@@ -31,11 +30,7 @@ pub fn start(watcher: *MacosWatcher) !void {
     t.detach();
 }
 
-pub fn listen(watcher: *MacosWatcher) void {
-    errdefer |err| switch (err) {
-        error.OutOfMemory => fatal.oom(),
-    };
-
+pub fn listen(watcher: *MacosWatcher) error{ OutOfMemory, FSEventStreamError }!void {
     const macos_paths = try watcher.gpa.alloc(
         c.CFStringRef,
         watcher.dir_paths.len,
@@ -74,9 +69,8 @@ pub fn listen(watcher: *MacosWatcher) void {
         c.kCFRunLoopDefaultMode,
     );
 
-    if (c.FSEventStreamStart(stream) == 0) {
-        fatal.msg("error: macos watcher FSEventStreamStart failed", .{});
-    }
+    if (c.FSEventStreamStart(stream) == 0)
+        return error.FSEventStreamError;
 
     c.CFRunLoopRun();
 
@@ -98,9 +92,9 @@ pub fn macosCallback(
     _ = eventIds;
     _ = eventFlags;
     _ = streamRef;
-    const watcher: *MacosWatcher = @alignCast(@ptrCast(clientCallBackInfo));
+    const watcher: *MacosWatcher = @ptrCast(@alignCast(clientCallBackInfo));
 
-    const paths: [*][*:0]u8 = @alignCast(@ptrCast(eventPaths));
+    const paths: [*][*:0]u8 = @ptrCast(@alignCast(eventPaths));
     for (paths[0..numEvents]) |p| {
         const path = std.mem.span(p);
         log.debug("Changed: {s}\n", .{path});

src/watcher/WindowsWatcher.zig

@@ -2,8 +2,7 @@ const WindowsWatcher = @This();
 
 const std = @import("std");
 const windows = std.os.windows;
-const fatal = @import("../../../fatal.zig");
-const Debouncer = @import("../../serve.zig").Debouncer;
+const Debouncer = @import("Debouncer.zig");
 
 const log = std.log.scoped(.watcher);
 
@@ -40,11 +39,7 @@ pub fn init(
     gpa: std.mem.Allocator,
     debouncer: *Debouncer,
     dir_paths: []const []const u8,
-) WindowsWatcher {
-    errdefer |err| fatal.msg("error: unable to start the file watcher: {s}", .{
-        @errorName(err),
-    });
-
+) !WindowsWatcher {
     var watcher = WindowsWatcher{
         .debouncer = debouncer,
         .iocp_port = windows.INVALID_HANDLE_VALUE,

src/watcher/root.zig

@@ -1,8 +1,47 @@
 const builtin = @import("builtin");
 
 pub const Watcher = switch (builtin.target.os.tag) {
-    .linux => @import("serve/watcher/LinuxWatcher.zig"),
-    .macos => @import("serve/watcher/MacosWatcher.zig"),
-    .windows => @import("serve/watcher/WindowsWatcher.zig"),
+    .linux => @import("LinuxWatcher.zig"),
+    .macos => @import("MacosWatcher.zig"),
+    .windows => @import("WindowsWatcher.zig"),
     else => @compileError("unsupported platform"),
 };
+
+pub const Debouncer = @import("Debouncer.zig");
+
+pub const Error = error{
+    OutOfMemory,
+    SystemResources,
+    Unexpected,
+    ProcessFdQuotaExceeded,
+    SystemFdQuotaExceeded,
+    LockedMemoryLimitExceeded,
+    ThreadQuotaExceeded,
+    IsDir,
+    WouldBlock,
+    AccessDenied,
+    ProcessNotFound,
+    PermissionDenied,
+    FileTooBig,
+    NoSpaceLeft,
+    DeviceBusy,
+    NoDevice,
+    SharingViolation,
+    PathAlreadyExists,
+    FileNotFound,
+    PipeBusy,
+    NameTooLong,
+    InvalidUtf8,
+    InvalidWtf8,
+    BadPathName,
+    NetworkNotFound,
+    AntivirusInterference,
+    SymLinkLoop,
+    NotDir,
+    FileLocksNotSupported,
+    FileBusy,
+    UserResourceLimitReached,
+    WatchAlreadyExists,
+    InvalidHandle,
+    QueueFailed,
+};