remove zarc in favor us custom unzip implementation

README.md

@@ -58,6 +58,4 @@ Zigup is currently built/tested using zig 0.11.0.
 
 # Dependencies
 
-The windows target depends on https://github.com/SuperAuguste/zarc to extract zip files.  This repo might point to my fork if there are needed changes pending the acceptance of a PR: https://github.com/marler8997/zarc.
-
 On linux and macos, zigup depends on `tar` to extract the compiler archive files (this may change in the future).

build.zig

@@ -94,9 +94,6 @@ fn addZigupExe(
 
     if (target.result.os.tag == .windows) {
         exe.root_module.addImport("win32exelink", win32exelink_mod.?);
-        if (b.lazyDependency("zarc", .{})) |zarc_dep| {
-            exe.root_module.addImport("zarc", zarc_dep.module("zarc"));
-        }
     }
 
     return exe;

build.zig.zon

@@ -2,14 +2,6 @@
     .name = "zigup",
     .version = "0.0.1",
 
-    .dependencies = .{
-        .zarc = .{
-            .url = "https://github.com/marler8997/zarc/archive/6ed370681d0e0c5d8ef32ad63e440d0b3effc8a8.tar.gz",
-            .hash = "1220a69ceaac42e5a3593161c3b4ab1ce7dbc574b1a80398a7cb3100fbfa07baf372",
-            .lazy = true,
-        },
-    },
-
     .paths = .{
         "LICENSE",
         "README.md",
@@ -19,5 +11,6 @@
         "test.zig",
         "win32exelink.zig",
         "zigup.zig",
+        "zip.zig",
     },
 }

zigup.zig

@@ -2,11 +2,11 @@ const std = @import("std");
 const builtin = @import("builtin");
 const mem = std.mem;
 
+const zip = @import("zip.zig");
+
 const ArrayList = std.ArrayList;
 const Allocator = mem.Allocator;
 
-const zarc = @import("zarc");
-
 const fixdeletetree = @import("fixdeletetree.zig");
 
 const arch = switch (builtin.cpu.arch) {
@@ -1007,10 +1007,7 @@ fn installCompiler(allocator: Allocator, compiler_dir: []const u8, url: []const
                     var timer = try std.time.Timer.start();
                     var archive_file = try std.fs.openFileAbsolute(archive_absolute, .{});
                     defer archive_file.close();
-                    const reader = archive_file.reader();
-                    var archive = try zarc.zip.load(allocator, reader);
-                    defer archive.deinit(allocator);
-                    _ = try archive.extract(reader, installing_dir_opened, .{});
+                    try zip.pipeToFileSystem(installing_dir_opened, archive_file);
                     const time = timer.read();
                     loginfo("extracted archive in {d:.2} s", .{@as(f32, @floatFromInt(time)) / @as(f32, @floatFromInt(std.time.ns_per_s))});
                 }