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const builtin = @import("builtin");
const std = @import("std");
const xdg = @import("xdg");
const Allocator = std.mem.Allocator;
const ArrayList = std.ArrayList;
const Config = @This();
const CrossTarget = std.zig.CrossTarget;
const File = std.fs.File;
const NativeTargetInfo = std.zig.system.NativeTargetInfo;
const Target = std.Target;
allocator: Allocator,
/// Earlier in the list means more preferred.
supported_targets: ArrayList(Target),
pub fn init(allocator: Allocator) !Config {
var self = Config{
.allocator = allocator,
.supported_targets = ArrayList(Target).init(allocator),
};
errdefer self.deinit();
// Native target is always supported and at highest priority
try self.supported_targets.append(builtin.target);
const config_dirs = try xdg.getAllConfigDirs(allocator, "zup");
defer {
for (config_dirs) |s| allocator.free(s);
allocator.free(config_dirs);
}
for (config_dirs) |config_dir| {
const file_name = try std.fs.path.join(allocator, &.{ config_dir, "zup.json" });
defer allocator.free(file_name);
var file = std.fs.openFileAbsolute(file_name, .{}) catch |err| {
if (err == error.FileNotFound) {
continue;
} else {
return err;
}
};
defer file.close();
try self.readConfig(file);
}
return self;
}
pub fn deinit(self: *Config) void {
self.supported_targets.deinit();
self.* = undefined;
}
fn readConfig(self: *Config, file: File) !void {
const allocator = self.allocator;
const reader = file.reader();
var json_str = try reader.readAllAlloc(allocator, std.math.maxInt(u64));
defer allocator.free(json_str);
var parser = std.json.Parser.init(allocator, false);
defer parser.deinit();
var vt = try parser.parse(json_str);
defer vt.deinit();
if (vt.root != .Object) {
std.log.warn("Failed at reading config, root isn't object.", .{});
return;
}
if (vt.root.Object.get("supported_targets")) |supported_targets| blk: {
if (supported_targets != .Array) {
break :blk;
}
for (supported_targets.Array.items) |supported_target| {
if (supported_target != .String) {
continue;
}
const cross_target = try CrossTarget.parse(.{
.arch_os_abi = supported_target.String,
});
const native_target_info = try NativeTargetInfo.detect(allocator, cross_target);
try self.supported_targets.append(native_target_info.target);
}
}
}
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