From b195a94aebee840314f16313e34a5438137adab6 Mon Sep 17 00:00:00 2001
From: Tim Culverhouse <tim@timculverhouse.com>
Date: Wed, 14 May 2025 10:59:18 -0800
Subject: [PATCH] opts: allow files as args

Fixes: https://tangled.sh/@rockorager.dev/lsr/issues/3
---
 build.zig.zon |  4 ++--
 src/main.zig  | 38 +++++++++++++++++++++++++++++++++++++-
 2 files changed, 39 insertions(+), 3 deletions(-)

diff --git a/build.zig.zon b/build.zig.zon
index ebbf308..89cfde1 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -7,8 +7,8 @@
 
     .dependencies = .{
         .ourio = .{
-            .url = "git+https://github.com/rockorager/ourio#54c1a1ed8d0994636770e5185ecdb59fe6d8535e",
-            .hash = "ourio-0.0.0-_s-z0asOAgAhpi7gSpLLvWGj_4XURez4W9TWN6SGs5BP",
+            .url = "git+https://github.com/rockorager/ourio#17280493cff33a4713d7df39933557792789f002",
+            .hash = "ourio-0.0.0-_s-z0fsOAgBBgWaFDe0-yxAFdOJYN0ySemeXbEghPUh9",
         },
         .zeit = .{
             .url = "git+https://github.com/rockorager/zeit#4496d1c40b2223c22a1341e175fc2ecd94cc0de9",
diff --git a/src/main.zig b/src/main.zig
index 0132fab..fbd2531 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -43,6 +43,7 @@ const Options = struct {
     reverse_sort: bool = false,
 
     directory: [:0]const u8 = ".",
+    file: ?[]const u8 = null,
 
     winsize: ?posix.winsize = null,
     colors: Colors = .none,
@@ -775,7 +776,32 @@ fn onCompletion(io: *ourio.Ring, task: ourio.Task) anyerror!void {
 
     switch (msg) {
         .cwd => {
-            const fd = try result.open;
+            const fd = result.open catch |err| {
+                switch (err) {
+                    error.NotDir => {
+                        // Guard against infinite recursion
+                        if (cmd.opts.file != null) return err;
+
+                        // if the user specified a file (or something that couldn't be opened as a
+                        // directory), then we open it's parent and apply a filter
+                        const dirname = std.fs.path.dirname(cmd.opts.directory) orelse ".";
+                        cmd.opts.file = std.fs.path.basename(cmd.opts.directory);
+                        cmd.opts.directory = try cmd.arena.dupeZ(u8, dirname);
+                        _ = try io.open(
+                            cmd.opts.directory,
+                            .{ .DIRECTORY = true, .CLOEXEC = true },
+                            0,
+                            .{
+                                .ptr = cmd,
+                                .cb = onCompletion,
+                                .msg = @intFromEnum(Msg.cwd),
+                            },
+                        );
+                        return;
+                    },
+                    else => return err,
+                }
+            };
             // we are async, no need to defer!
             _ = try io.close(fd, .{});
             const dir: std.fs.Dir = .{ .fd = fd };
@@ -806,6 +832,16 @@ fn onCompletion(io: *ourio.Ring, task: ourio.Task) anyerror!void {
             var iter = dir.iterate();
             while (try iter.next()) |dirent| {
                 if (!cmd.opts.showDotfiles() and std.mem.startsWith(u8, dirent.name, ".")) continue;
+                if (cmd.opts.file) |file| {
+                    if (eql(file, dirent.name)) {
+                        const nameZ = try cmd.arena.dupeZ(u8, dirent.name);
+                        try temp_results.append(cmd.arena, .{
+                            .name = nameZ,
+                            .kind = dirent.kind,
+                        });
+                    }
+                    continue;
+                }
                 const nameZ = try cmd.arena.dupeZ(u8, dirent.name);
                 try temp_results.append(cmd.arena, .{
                     .name = nameZ,
-- 
2.51.2