Use keybind actions help strings in +list-keybinds.

src/cli/list_keybinds.zig

@@ -1,17 +1,20 @@
 const std = @import("std");
-const inputpkg = @import("../input.zig");
 const args = @import("args.zig");
 const Action = @import("action.zig").Action;
+const KeybindAction = @import("../input/Binding.zig").Action;
 const Arena = std.heap.ArenaAllocator;
 const Allocator = std.mem.Allocator;
 const configpkg = @import("../config.zig");
 const Config = configpkg.Config;
+const help_strings = @import("help_strings");
 
 pub const Options = struct {
     /// If true, print out the default keybinds instead of the ones
     /// configured in the config file.
     default: bool = false,
 
+    docs: bool = false,
+
     pub fn deinit(self: Options) void {
         _ = self;
     }
@@ -47,6 +50,24 @@ pub fn run(alloc: Allocator) !u8 {
     defer config.deinit();
 
     const stdout = std.io.getStdOut().writer();
+    if (opts.docs) {
+        const info = @typeInfo(KeybindAction);
+        var first = true;
+        inline for (info.Union.fields) |field| {
+            if (field.name[0] == '_') continue;
+            if (@hasDecl(help_strings.KeybindAction, field.name)) {
+                if (!first) try stdout.print("#\n", .{});
+                try stdout.print("# {s}\n", .{field.name});
+                const help = @field(help_strings.KeybindAction, field.name);
+                var lines = std.mem.splitScalar(u8, help, '\n');
+                while (lines.next()) |line| {
+                    try stdout.print("#   {s}\n", .{line});
+                }
+                first = false;
+            }
+        }
+    }
+
     try config.keybind.formatEntry(configpkg.entryFormatter("keybind", stdout));
 
     return 0;