std: use std.ArrayList(u8) instead of std.Buffer in std/child_process.zig

Author: daurnimator

lib/std/child_process.zig

@@ -10,7 +10,6 @@ const windows = os.windows;
 const mem = std.mem;
 const debug = std.debug;
 const BufMap = std.BufMap;
-const Buffer = std.Buffer;
 const builtin = @import("builtin");
 const Os = builtin.Os;
 const TailQueue = std.TailQueue;
@@ -777,36 +776,36 @@ fn windowsCreateProcess(app_name: [*:0]u16, cmd_line: [*:0]u16, envp_ptr: ?[*]u1
 /// Caller must dealloc.
 /// Guarantees a null byte at result[result.len].
 fn windowsCreateCommandLine(allocator: *mem.Allocator, argv: []const []const u8) ![]u8 {
-    var buf = try Buffer.initSize(allocator, 0);
+    var buf = std.ArrayList(u8).init(allocator);
     defer buf.deinit();
 
     var buf_stream = buf.outStream();
 
     for (argv) |arg, arg_i| {
-        if (arg_i != 0) try buf.appendByte(' ');
+        if (arg_i != 0) try buf.append(' ');
         if (mem.indexOfAny(u8, arg, " \t\n\"") == null) {
-            try buf.append(arg);
+            try buf.appendSlice(arg);
             continue;
         }
-        try buf.appendByte('"');
+        try buf.append('"');
         var backslash_count: usize = 0;
         for (arg) |byte| {
             switch (byte) {
                 '\\' => backslash_count += 1,
                 '"' => {
-                    try buf_stream.writeByteNTimes('\\', backslash_count * 2 + 1);
-                    try buf.appendByte('"');
+                    try buf.appendNTimes('\\', backslash_count * 2 + 1);
+                    try buf.append('"');
                     backslash_count = 0;
                 },
                 else => {
-                    try buf_stream.writeByteNTimes('\\', backslash_count);
-                    try buf.appendByte(byte);
+                    try buf.appendNTimes('\\', backslash_count);
+                    try buf.append(byte);
                     backslash_count = 0;
                 },
             }
         }
-        try buf_stream.writeByteNTimes('\\', backslash_count * 2);
-        try buf.appendByte('"');
+        try buf.appendNTimes('\\', backslash_count * 2);
+        try buf.append('"');
     }
 
     return buf.toOwnedSlice();