first commit

bin/flutter-elinux

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+#!/usr/bin/env bash
+# Copyright 2021 Sony Group Corporation. All rights reserved.
+# Copyright 2021 Samsung Electronics Co., Ltd. All rights reserved.
+# Copyright 2014 The Flutter Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+set -e
+
+# Needed because if it is set, cd may print the path it changed to.
+unset CDPATH
+
+# On Mac OS, readlink -f doesn't work, so follow_links traverses the path one
+# link at a time, and then cds into the link destination and find out where it
+# ends up.
+#
+# The returned filesystem path must be a format usable by Dart's URI parser,
+# since the Dart command line tool treats its argument as a file URI, not a
+# filename. For instance, multiple consecutive slashes should be reduced to a
+# single slash, since double-slashes indicate a URI "authority", and these are
+# supposed to be filenames. There is an edge case where this will return
+# multiple slashes: when the input resolves to the root directory. However, if
+# that were the case, we wouldn't be running this shell, so we don't do anything
+# about it.
+#
+# The function is enclosed in a subshell to avoid changing the working directory
+# of the caller.
+function follow_links() (
+  cd -P "$(dirname -- "$1")"
+  file="$PWD/$(basename -- "$1")"
+  while [[ -h "$file" ]]; do
+    cd -P "$(dirname -- "$file")"
+    file="$(readlink -- "$file")"
+    cd -P "$(dirname -- "$file")"
+    file="$PWD/$(basename -- "$file")"
+  done
+  echo "$file"
+)
+
+PROG_NAME="$(follow_links "${BASH_SOURCE[0]}")"
+BIN_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
+OS="$(uname -s)"
+
+# Allow only 64-bit host platform.
+if [ "$(getconf LONG_BIT)" != "64" ]; then
+  echo "$(basename $PROG_NAME) only supports 64 bit platforms."
+  exit 1
+fi
+
+# If we're on Windows, invoke the batch script instead to get proper locking.
+if [[ $OS =~ MINGW.* || $OS =~ CYGWIN.* ]]; then
+  echo "Window platforms are not supported."
+  exit 1
+fi
+
+source "$BIN_DIR/internal/shared.sh"
+
+# Clone or update the flutter repo.
+update_flutter
+
+# Upgrade flutter-elinux if needed.
+update_flutter_elinux
+
+# Run the snapshot.
+exec_snapshot "$@"