feat: update config loader to support current flow editor configuration files
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9b3f6153da
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8EB1E1BB660E3FB9
3 changed files with 155 additions and 44 deletions
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@ -1 +1,2 @@
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theme: []const u8 = "default",
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include_files: []const u8 = "",
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@ -4,51 +4,153 @@ const builtin = @import("builtin");
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const application_name = "flow";
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const config = struct {
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theme: []const u8 = "default",
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};
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pub fn read_config(a: std.mem.Allocator, buf: *?[]const u8) config {
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const file_name = get_app_config_file_name(application_name) catch return .{};
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return read_json_config_file(a, file_name, buf) catch .{};
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pub fn read_config(T: type, allocator: std.mem.Allocator) struct { T, [][]const u8 } {
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var bufs: [][]const u8 = &[_][]const u8{};
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const json_file_name = get_app_config_file_name(application_name, @typeName(T)) catch return .{ .{}, bufs };
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const text_file_name = json_file_name[0 .. json_file_name.len - ".json".len];
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var conf: T = .{};
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if (!read_config_file(T, allocator, &conf, &bufs, text_file_name)) {
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_ = read_config_file(T, allocator, &conf, &bufs, json_file_name);
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}
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read_nested_include_files(T, allocator, &conf, &bufs);
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return .{ conf, bufs };
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}
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fn read_json_config_file(a: std.mem.Allocator, file_name: []const u8, buf: *?[]const u8) !config {
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var file = std.fs.openFileAbsolute(file_name, .{ .mode = .read_only }) catch |e| switch (e) {
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error.FileNotFound => return .{},
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else => return e,
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pub fn free_config(allocator: std.mem.Allocator, bufs: [][]const u8) void {
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for (bufs) |buf| allocator.free(buf);
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}
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// returns true if the file was found
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fn read_config_file(T: type, allocator: std.mem.Allocator, conf: *T, bufs: *[][]const u8, file_name: []const u8) bool {
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std.log.info("loading {s}", .{file_name});
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const err: anyerror = blk: {
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if (std.mem.endsWith(u8, file_name, ".json")) if (read_json_config_file(T, allocator, conf, bufs, file_name)) return true else |e| break :blk e;
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if (read_text_config_file(T, allocator, conf, bufs, file_name)) return true else |e| break :blk e;
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};
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switch (err) {
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error.FileNotFound => return false,
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else => |e| std.log.err("error reading config file '{s}': {s}", .{ file_name, @errorName(e) }),
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}
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return true;
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}
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fn read_text_config_file(T: type, allocator: std.mem.Allocator, conf: *T, bufs_: *[][]const u8, file_name: []const u8) !void {
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var file = try std.fs.openFileAbsolute(file_name, .{ .mode = .read_only });
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defer file.close();
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const json = try file.readToEndAlloc(a, 64 * 1024);
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defer a.free(json);
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const cbor_buf: []u8 = try a.alloc(u8, json.len);
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buf.* = cbor_buf;
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const text = try file.readToEndAlloc(allocator, 64 * 1024);
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defer allocator.free(text);
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var cbor_buf = std.ArrayList(u8).init(allocator);
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defer cbor_buf.deinit();
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const writer = cbor_buf.writer();
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var it = std.mem.splitScalar(u8, text, '\n');
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var lineno: u32 = 0;
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while (it.next()) |line| {
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lineno += 1;
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if (line.len == 0 or line[0] == '#')
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continue;
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const sep = std.mem.indexOfScalar(u8, line, ' ') orelse {
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std.log.err("{s}:{}: {s} missing value", .{ file_name, lineno, line });
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continue;
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};
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const name = line[0..sep];
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const value_str = line[sep + 1 ..];
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const cb = cbor.fromJsonAlloc(allocator, value_str) catch {
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std.log.err("{s}:{}: {s} has bad value: {s}", .{ file_name, lineno, name, value_str });
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continue;
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};
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defer allocator.free(cb);
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try cbor.writeValue(writer, name);
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try cbor_buf.appendSlice(cb);
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}
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const cb = try cbor_buf.toOwnedSlice();
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var bufs = std.ArrayListUnmanaged([]const u8).fromOwnedSlice(bufs_.*);
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bufs.append(allocator, cb) catch @panic("OOM:read_text_config_file");
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bufs_.* = bufs.toOwnedSlice(allocator) catch @panic("OOM:read_text_config_file");
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return read_cbor_config(T, conf, file_name, cb);
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}
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fn read_json_config_file(T: type, allocator: std.mem.Allocator, conf: *T, bufs_: *[][]const u8, file_name: []const u8) !void {
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var file = try std.fs.openFileAbsolute(file_name, .{ .mode = .read_only });
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defer file.close();
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const json = try file.readToEndAlloc(allocator, 64 * 1024);
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defer allocator.free(json);
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const cbor_buf: []u8 = try allocator.alloc(u8, json.len);
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var bufs = std.ArrayListUnmanaged([]const u8).fromOwnedSlice(bufs_.*);
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bufs.append(allocator, cbor_buf) catch @panic("OOM:read_json_config_file");
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bufs_.* = bufs.toOwnedSlice(allocator) catch @panic("OOM:read_json_config_file");
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const cb = try cbor.fromJson(json, cbor_buf);
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var iter = cb;
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var len = try cbor.decodeMapHeader(&iter);
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var data: config = .{};
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while (len > 0) : (len -= 1) {
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var found = false;
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_ = try cbor.decodeMapHeader(&iter);
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return read_cbor_config(T, conf, file_name, iter);
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}
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fn read_cbor_config(
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T: type,
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conf: *T,
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file_name: []const u8,
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cb: []const u8,
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) !void {
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var iter = cb;
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var field_name: []const u8 = undefined;
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if (!(try cbor.matchString(&iter, &field_name))) return error.InvalidConfig;
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inline for (@typeInfo(config).@"struct".fields) |field_info| {
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while (cbor.matchString(&iter, &field_name) catch |e| switch (e) {
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error.TooShort => return,
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else => return e,
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}) {
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var known = false;
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inline for (@typeInfo(T).@"struct".fields) |field_info|
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if (comptime std.mem.eql(u8, "include_files", field_info.name)) {
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if (std.mem.eql(u8, field_name, field_info.name)) {
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known = true;
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var value: field_info.type = undefined;
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if (!(try cbor.matchValue(&iter, cbor.extract(&value)))) return error.InvalidConfig;
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@field(data, field_info.name) = value;
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found = true;
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if (try cbor.matchValue(&iter, cbor.extract(&value))) {
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if (conf.include_files.len > 0) {
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std.log.warn("{s}: ignoring nested 'include_files' value '{s}'", .{ file_name, value });
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} else {
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@field(conf, field_info.name) = value;
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}
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} else {
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try cbor.skipValue(&iter);
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std.log.err("invalid value for key '{s}'", .{field_name});
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}
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}
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if (!found) try cbor.skipValue(&iter);
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} else if (std.mem.eql(u8, field_name, field_info.name)) {
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known = true;
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var value: field_info.type = undefined;
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if (try cbor.matchValue(&iter, cbor.extract(&value))) {
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@field(conf, field_info.name) = value;
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} else {
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try cbor.skipValue(&iter);
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std.log.err("invalid value for key '{s}'", .{field_name});
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}
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return data;
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};
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if (!known) {
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try cbor.skipValue(&iter);
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std.log.warn("unknown config value '{s}' ignored", .{field_name});
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}
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}
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}
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fn read_nested_include_files(T: type, allocator: std.mem.Allocator, conf: *T, bufs: *[][]const u8) void {
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if (conf.include_files.len == 0) return;
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var it = std.mem.splitScalar(u8, conf.include_files, std.fs.path.delimiter);
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while (it.next()) |path| if (!read_config_file(T, allocator, conf, bufs, path)) {
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std.log.warn("config include file '{s}' is not found", .{path});
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};
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}
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pub fn get_config_dir() ![]const u8 {
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return get_app_config_dir(application_name);
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}
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fn get_app_config_dir(appname: []const u8) ![]const u8 {
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pub const ConfigDirError = error{
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NoSpaceLeft,
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MakeConfigDirFailed,
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MakeHomeConfigDirFailed,
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MakeAppConfigDirFailed,
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AppConfigDirUnavailable,
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};
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fn get_app_config_dir(appname: []const u8) ConfigDirError![]const u8 {
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const a = std.heap.c_allocator;
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const local = struct {
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var config_dir_buffer: [std.posix.PATH_MAX]u8 = undefined;
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@ -64,7 +166,7 @@ fn get_app_config_dir(appname: []const u8) ![]const u8 {
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const dir = try std.fmt.bufPrint(&local.config_dir_buffer, "{s}/.config", .{home});
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std.fs.makeDirAbsolute(dir) catch |e| switch (e) {
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error.PathAlreadyExists => {},
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else => return e,
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else => return error.MakeHomeConfigDirFailed,
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};
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break :ret try std.fmt.bufPrint(&local.config_dir_buffer, "{s}/.config/{s}", .{ home, appname });
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} else if (builtin.os.tag == .windows) ret: {
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@ -73,7 +175,7 @@ fn get_app_config_dir(appname: []const u8) ![]const u8 {
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const dir = try std.fmt.bufPrint(&local.config_dir_buffer, "{s}/{s}", .{ appdata, appname });
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std.fs.makeDirAbsolute(dir) catch |e| switch (e) {
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error.PathAlreadyExists => {},
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else => return e,
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else => return error.MakeAppConfigDirFailed,
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};
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break :ret dir;
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} else return error.AppConfigDirUnavailable;
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@ -82,21 +184,24 @@ fn get_app_config_dir(appname: []const u8) ![]const u8 {
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local.config_dir = config_dir;
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std.fs.makeDirAbsolute(config_dir) catch |e| switch (e) {
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error.PathAlreadyExists => {},
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else => return e,
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else => return error.MakeConfigDirFailed,
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};
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var theme_dir_buffer: [std.posix.PATH_MAX]u8 = undefined;
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std.fs.makeDirAbsolute(try std.fmt.bufPrint(&theme_dir_buffer, "{s}/{s}", .{ config_dir, theme_dir })) catch {};
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return config_dir;
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}
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fn get_app_config_file_name(appname: []const u8) ![]const u8 {
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const theme_dir = "themes";
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fn get_app_config_file_name(appname: []const u8, comptime base_name: []const u8) ConfigDirError![]const u8 {
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return get_app_config_dir_file_name(appname, base_name ++ ".json");
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}
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fn get_app_config_dir_file_name(appname: []const u8, comptime config_file_name: []const u8) ConfigDirError![]const u8 {
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const local = struct {
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var config_file_buffer: [std.posix.PATH_MAX]u8 = undefined;
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var config_file: ?[]const u8 = null;
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};
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const config_file_name = "config.json";
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const config_file = if (local.config_file) |file|
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file
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else
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try std.fmt.bufPrint(&local.config_file_buffer, "{s}/{s}", .{ try get_app_config_dir(appname), config_file_name });
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local.config_file = config_file;
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return config_file;
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return std.fmt.bufPrint(&local.config_file_buffer, "{s}/{s}", .{ try get_app_config_dir(appname), config_file_name });
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}
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@ -13,6 +13,11 @@ var lang_override: ?[]const u8 = null;
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var lang_default: []const u8 = "conf";
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const no_highlight = std.math.maxInt(usize);
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const builtin = @import("builtin");
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pub const std_options: std.Options = .{
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.log_level = if (builtin.mode == .Debug) .info else .err,
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};
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pub fn main() !void {
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const params = comptime clap.parseParamsComptime(
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\\-h, --help Display this help and exit.
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@ -72,8 +77,8 @@ pub fn main() !void {
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if (res.args.color == 0 and !stdout_file.supportsAnsiEscapeCodes())
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return plain_cat(res.positionals[0]);
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var conf_buf: ?[]const u8 = null;
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const conf = config_loader.read_config(a, &conf_buf);
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const conf, const conf_bufs = config_loader.read_config(a);
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defer config_loader.free_config(a, conf_bufs);
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const theme_name = if (res.args.theme) |theme| theme else conf.theme;
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const limit_lines = res.args.limit;
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