pyrox.dev
1From 6df275df3b8694daf16302b407520e3b1dee6724 Mon Sep 17 00:00:00 2001
2From: Philip Hayes <philiphayes9@gmail.com>
3Date: Thu, 12 Sep 2024 13:23:00 -0700
4Subject: [PATCH] fix: cleanup xcode_backend.sh to fix iOS build w/
5 `NixOS/nixpkgs` flutter
6
7This patch cleans up `xcode_backend.sh`. It now effectively just runs
8`exec $FLUTTER_ROOT/bin/dart ./xcode_backend.dart`.
9
10The previous `xcode_backend.sh` tries to discover `$FLUTTER_ROOT` from
11argv[0], even though its presence is already guaranteed (the wrapped
12`xcode_backend.dart` also relies on this env).
13
14When using nixpkgs flutter, the flutter SDK directory is composed of several
15layers, joined together using symlinks (called a `symlinkJoin`). Without this
16patch, the auto-discover traverses the symlinks into the wrong layer, and so it
17uses an "unwrapped" `dart` command instead of a "wrapped" dart that sets some
18important envs/flags (like `$FLUTTER_ROOT`).
19
20Using the "unwrapped" dart then manifests in this error when compiling, since
21it doesn't see the ios build-support artifacts:
22
23```
24$ flutter run -d iphone
25Running Xcode build...
26Xcode build done. 6.4s
27Failed to build iOS app
28Error (Xcode): Target debug_unpack_ios failed: Error: Flutter failed to create a directory at "/<nix-store>/XXXX-flutter-3.24.1-unwrapped/bin/cache/artifacts".
29```
30---
31 packages/flutter_tools/bin/xcode_backend.sh | 25 ++++-----------------
32 1 file changed, 4 insertions(+), 21 deletions(-)
33
34diff --git a/packages/flutter_tools/bin/xcode_backend.sh b/packages/flutter_tools/bin/xcode_backend.sh
35index 2889d7c8e4..48b9d06c6e 100755
36--- a/packages/flutter_tools/bin/xcode_backend.sh
37+++ b/packages/flutter_tools/bin/xcode_backend.sh
38@@ -6,24 +6,7 @@
39 # exit on error, or usage of unset var
40 set -euo pipefail
41
42-# Needed because if it is set, cd may print the path it changed to.
43-unset CDPATH
44-
45-function follow_links() (
46- cd -P "$(dirname -- "$1")"
47- file="$PWD/$(basename -- "$1")"
48- while [[ -h "$file" ]]; do
49- cd -P "$(dirname -- "$file")"
50- file="$(readlink -- "$file")"
51- cd -P "$(dirname -- "$file")"
52- file="$PWD/$(basename -- "$file")"
53- done
54- echo "$file"
55-)
56-
57-PROG_NAME="$(follow_links "${BASH_SOURCE[0]}")"
58-BIN_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
59-FLUTTER_ROOT="$BIN_DIR/../../.."
60-DART="$FLUTTER_ROOT/bin/dart"
61-
62-"$DART" "$BIN_DIR/xcode_backend.dart" "$@"
63+# Run `dart ./xcode_backend.dart` with the dart from $FLUTTER_ROOT.
64+dart="${FLUTTER_ROOT}/bin/dart"
65+xcode_backend_dart="${BASH_SOURCE[0]%.sh}.dart"
66+exec "${dart}" "${xcode_backend_dart}" "$@"
67--
682.46.0
69