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feat(cli): add colored output when stdout is a tty

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This commit is contained in:
CJ van den Berg 2026-03-09 11:56:09 +01:00
parent 19b7fd4c4a
commit 163150690f
Signed by: neurocyte
GPG key ID: 8EB1E1BB660E3FB9
1 changed files with 44 additions and 17 deletions
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61
src/main.zig
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@ -23,6 +23,7 @@ fn posix_sighandler(_: c_int) callconv(.c) void {
const CliHandler = struct {
handler: Watcher.Handler,
out: std.fs.File,
tty: std.io.tty.Config,
ignore: []const []const u8,
const vtable: Watcher.Handler.VTable = switch (Watcher.interface_type) {
@ -43,20 +44,26 @@ const CliHandler = struct {
if (std.mem.eql(u8, path, ignored)) return;
}
var buf: [4096]u8 = undefined;
var stdout = self.out.writer(&buf);
defer stdout.interface.flush() catch {};
var w = self.out.writer(&buf);
defer w.interface.flush() catch {};
const color: std.io.tty.Color = switch (event_type) {
.created => .green,
.modified => .blue,
.deleted => .red,
.renamed => .magenta,
};
const event_label = switch (event_type) {
.created => "create ",
.modified => "modify ",
.deleted => "delete ",
.renamed => "rename ",
};
const type_label = switch (object_type) {
.file => "file",
.dir => "dir ",
.unknown => "? ",
};
stdout.interface.print("{s} {s} {s}\n", .{ event_label, type_label, path }) catch return error.HandlerFailed;
self.tty.setColor(&w.interface, color) catch return error.HandlerFailed;
w.interface.writeAll(event_label) catch return error.HandlerFailed;
self.tty.setColor(&w.interface, .reset) catch return error.HandlerFailed;
w.interface.writeAll(" ") catch return error.HandlerFailed;
self.writeTypeLabel(&w.interface, object_type) catch return error.HandlerFailed;
w.interface.print(" {s}\n", .{path}) catch return error.HandlerFailed;
}
fn rename_cb(h: *Watcher.Handler, src: []const u8, dst: []const u8, object_type: nightwatch.ObjectType) error{HandlerFailed}!void {
@ -65,14 +72,30 @@ const CliHandler = struct {
if (std.mem.eql(u8, src, ignored) or std.mem.eql(u8, dst, ignored)) return;
}
var buf: [4096]u8 = undefined;
var stdout = self.out.writer(&buf);
defer stdout.interface.flush() catch {};
const type_label = switch (object_type) {
.file => "file",
.dir => "dir ",
.unknown => "? ",
};
stdout.interface.print("rename {s} {s} -> {s}\n", .{ type_label, src, dst }) catch return error.HandlerFailed;
var w = self.out.writer(&buf);
defer w.interface.flush() catch {};
self.tty.setColor(&w.interface, .magenta) catch return error.HandlerFailed;
w.interface.writeAll("rename ") catch return error.HandlerFailed;
self.tty.setColor(&w.interface, .reset) catch return error.HandlerFailed;
w.interface.writeAll(" ") catch return error.HandlerFailed;
self.writeTypeLabel(&w.interface, object_type) catch return error.HandlerFailed;
w.interface.print(" {s} -> {s}\n", .{ src, dst }) catch return error.HandlerFailed;
}
fn writeTypeLabel(self: *CliHandler, w: *std.io.Writer, object_type: nightwatch.ObjectType) !void {
switch (object_type) {
.file => {
try self.tty.setColor(w, .cyan);
try w.writeAll("file");
try self.tty.setColor(w, .reset);
},
.dir => {
try self.tty.setColor(w, .yellow);
try w.writeAll("dir ");
try self.tty.setColor(w, .reset);
},
.unknown => try w.writeAll("? "),
}
}
fn wait_readable_cb(_: *Watcher.Handler) error{HandlerFailed}!Watcher.Handler.ReadableStatus {
@ -227,6 +250,7 @@ pub fn main() !void {
var cli_handler = CliHandler{
.handler = .{ .vtable = &CliHandler.vtable },
.out = std.fs.File.stdout(),
.tty = std.io.tty.detectConfig(std.fs.File.stdout()),
.ignore = ignore_list.items,
};
@ -242,7 +266,10 @@ pub fn main() !void {
try stderr.interface.print("nightwatch: {s}: {s}\n", .{ path, @errorName(err) });
continue;
};
try stdout.interface.print("# on watch: {s}\n", .{path});
try cli_handler.tty.setColor(&stdout.interface, .dim);
try stdout.interface.print("# on watch: {s}", .{path});
try cli_handler.tty.setColor(&stdout.interface, .reset);
try stdout.interface.print("\n", .{});
try stdout.interface.flush();
}