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91 lines
2.9 KiB
Zig
91 lines
2.9 KiB
Zig
const std = @import("std");
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const print = std.debug.print;
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const string = []const u8;
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const cwd = std.fs.cwd();
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const Dir = std.fs.Dir;
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const Allocator = std.mem.Allocator;
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const EXERCISES_PATH = "exercises";
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const ANSWERS_PATH = "answers";
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const PATCHES_PATH = "patches/patches";
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// Heals all the exercises.
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fn heal(alloc: Allocator) !void {
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try cwd.makePath(ANSWERS_PATH);
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const org_path = try cwd.realpathAlloc(alloc, EXERCISES_PATH);
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const patch_path = try cwd.realpathAlloc(alloc, PATCHES_PATH);
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const healed_path = try cwd.realpathAlloc(alloc, ANSWERS_PATH);
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var idir = try cwd.openIterableDir(EXERCISES_PATH, Dir.OpenDirOptions{});
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defer idir.close();
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var it = idir.iterate();
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while (try it.next()) |entry| {
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// create filenames
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const healed_file = try concat(alloc, &.{ healed_path, "/", entry.name });
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const patch_file = try concat(alloc, &.{ patch_path, "/", try patch_name(alloc, entry.name) });
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// patch the file
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const result = try std.ChildProcess.exec(.{
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.allocator = alloc,
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.argv = &.{ "patch", "-i", patch_file, "-o", healed_file, entry.name },
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.cwd = org_path,
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});
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print("{s}", .{result.stderr});
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}
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}
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// Creates new patch files for every exercise
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fn update(alloc: Allocator) !void {
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const org_path = try cwd.realpathAlloc(alloc, EXERCISES_PATH);
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const healed_path = try cwd.realpathAlloc(alloc, ANSWERS_PATH);
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const patch_path = try cwd.realpathAlloc(alloc, PATCHES_PATH);
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var idir = try cwd.openIterableDir(EXERCISES_PATH, Dir.OpenDirOptions{});
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defer idir.close();
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var it = idir.iterate();
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while (try it.next()) |entry| {
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// create diff
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const org_file = try concat(alloc, &.{ org_path, "/", entry.name });
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const healed_file = try concat(alloc, &.{ healed_path, "/", entry.name });
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const result = try std.ChildProcess.exec(.{
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.allocator = alloc,
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.argv = &.{ "diff", org_file, healed_file },
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});
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std.debug.assert(result.term.Exited == 1);
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// write diff to file
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const patch_file = try concat(alloc, &.{ patch_path, "/", try patch_name(alloc, entry.name) });
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var file = try std.fs.cwd().createFile(patch_file, .{ .read = false });
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defer file.close();
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try file.writer().print("{s}", .{result.stdout});
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}
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}
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fn concat(alloc: Allocator, slices: []const string) !string {
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const buf = try std.mem.concat(alloc, u8, slices);
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return buf;
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}
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fn patch_name(alloc: Allocator, path: string) !string {
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var filename = path;
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const index = std.mem.lastIndexOfScalar(u8, path, '.') orelse return path;
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if (index > 0) filename = path[0..index];
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return try concat(alloc, &.{ filename, ".patch" });
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}
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pub fn main() !void {
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var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
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defer arena.deinit();
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const alloc = arena.allocator();
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try heal(alloc);
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try update(alloc);
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}
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