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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188//! This program is used to generate the help strings from the configuration//! file and CLI actions for Ghostty. These can then be used to generate//! help, docs, website, etc.
const std = @import("std");const Config = @import("config/Config.zig");const Action = @import("cli/action.zig").Action;const KeybindAction = @import("input/Binding.zig").Action;
pub fn main() !void { var gpa = std.heap.GeneralPurposeAllocator(.{}){}; const alloc = gpa.allocator();
const stdout = std.io.getStdOut().writer(); try stdout.writeAll( \\// THIS FILE IS AUTO GENERATED \\ \\ );
try genConfig(alloc, stdout); try genActions(alloc, stdout); try genKeybindActions(alloc, stdout);}
fn genConfig(alloc: std.mem.Allocator, writer: anytype) !void { var ast = try std.zig.Ast.parse(alloc, @embedFile("config/Config.zig"), .zig); defer ast.deinit(alloc);
try writer.writeAll( \\/// Configuration help \\pub const Config = struct { \\ \\ );
inline for (@typeInfo(Config).@"struct".fields) |field| { if (field.name[0] == '_') continue; try genConfigField(alloc, writer, ast, field.name); }
try writer.writeAll("};\n");}
fn genConfigField( alloc: std.mem.Allocator, writer: anytype, ast: std.zig.Ast, comptime field: []const u8,) !void { const tokens = ast.tokens.items(.tag); for (tokens, 0..) |token, i| { // We only care about identifiers that are preceded by doc comments. if (token != .identifier) continue; if (tokens[i - 1] != .doc_comment) continue;
// Identifier may have @"" so we strip that. const name = ast.tokenSlice(@intCast(i)); const key = if (name[0] == '@') name[2 .. name.len - 1] else name; if (!std.mem.eql(u8, key, field)) continue;
const comment = try extractDocComments(alloc, ast, @intCast(i - 1), tokens); try writer.writeAll("pub const "); try writer.writeAll(name); try writer.writeAll(": [:0]const u8 = \n"); try writer.writeAll(comment); try writer.writeAll("\n"); break; }}
fn genActions(alloc: std.mem.Allocator, writer: anytype) !void { try writer.writeAll( \\ \\/// Actions help \\pub const Action = struct { \\ \\ );
inline for (@typeInfo(Action).@"enum".fields) |field| { const action_file = comptime action_file: { const action = @field(Action, field.name); break :action_file action.file(); };
var ast = try std.zig.Ast.parse(alloc, @embedFile(action_file), .zig); defer ast.deinit(alloc); const tokens: []std.zig.Token.Tag = ast.tokens.items(.tag);
for (tokens, 0..) |token, i| { // We're looking for a function named "run". if (token != .keyword_fn) continue; if (!std.mem.eql(u8, ast.tokenSlice(@intCast(i + 1)), "run")) continue;
// The function must be preceded by a doc comment. if (tokens[i - 2] != .doc_comment) { std.debug.print( "doc comment must be present on run function of the {s} action!", .{field.name}, ); std.process.exit(1); }
const comment = try extractDocComments(alloc, ast, @intCast(i - 2), tokens); try writer.writeAll("pub const @\""); try writer.writeAll(field.name); try writer.writeAll("\" = \n"); try writer.writeAll(comment); try writer.writeAll("\n\n"); break; } }
try writer.writeAll("};\n");}
fn genKeybindActions(alloc: std.mem.Allocator, writer: anytype) !void { var ast = try std.zig.Ast.parse(alloc, @embedFile("input/Binding.zig"), .zig); defer ast.deinit(alloc);
try writer.writeAll( \\/// keybind actions help \\pub const KeybindAction = struct { \\ \\ );
inline for (@typeInfo(KeybindAction).@"union".fields) |field| { if (field.name[0] == '_') continue; try genConfigField(alloc, writer, ast, field.name); }
try writer.writeAll("};\n");}
fn extractDocComments( alloc: std.mem.Allocator, ast: std.zig.Ast, index: std.zig.Ast.TokenIndex, tokens: []std.zig.Token.Tag,) ![]const u8 { // Find the first index of the doc comments. The doc comments are // always stacked on top of each other so we can just go backwards. const start_idx: usize = start_idx: for (0..index) |i| { const reverse_i = index - i - 1; const token = tokens[reverse_i]; if (token != .doc_comment) break :start_idx reverse_i + 1; } else unreachable;
// Go through and build up the lines. var lines = std.ArrayList([]const u8).init(alloc); defer lines.deinit(); for (start_idx..index + 1) |i| { const token = tokens[i]; if (token != .doc_comment) break; try lines.append(ast.tokenSlice(@intCast(i))[3..]); }
// Convert the lines to a multiline string. var buffer = std.ArrayList(u8).init(alloc); const writer = buffer.writer(); const prefix = findCommonPrefix(lines); for (lines.items) |line| { try writer.writeAll(" \\\\"); try writer.writeAll(line[@min(prefix, line.len)..]); try writer.writeAll("\n"); } try writer.writeAll(";\n");
return buffer.toOwnedSlice();}
fn findCommonPrefix(lines: std.ArrayList([]const u8)) usize { var m: usize = std.math.maxInt(usize); for (lines.items) |line| { var n: usize = std.math.maxInt(usize); for (line, 0..) |c, i| { if (c != ' ') { n = i; break; } } m = @min(m, n); } return m;}