f92f71feb9
This prevents multiple simultaneous runs of the analyzer from stomping over each other (e.g. multiple runs of 'update-packages'). Certain long-lived commands (like analyze, run, logs) are exempted once they've done enough work to be safe from most stomping action. This still doesn't make us entirely safe from craziness, e.g. if you're half way through an 'update-packages' run and you call 'git pull', who knows what state you'll end up in. But there's only so much one can do. Fixes https://github.com/flutter/flutter/issues/2762
67 lines
2.2 KiB
Bash
Executable File
67 lines
2.2 KiB
Bash
Executable File
#!/bin/bash
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# Copyright 2015 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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set -e
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function follow_links() {
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cd -P "${1%/*}"
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file="$PWD/${1##*/}"
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while [ -h "$file" ]; do
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# On Mac OS, readlink -f doesn't work.
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cd -P "${file%/*}"
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file="$(readlink "$file")"
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cd -P "${file%/*}"
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file="$PWD/${file##*/}"
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done
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echo "$PWD/${file##*/}"
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}
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PROG_NAME="$(follow_links "$BASH_SOURCE")"
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BIN_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
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export FLUTTER_ROOT="$(cd "${BIN_DIR}/.." ; pwd -P)"
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FLUTTER_TOOLS_DIR="$FLUTTER_ROOT/packages/flutter_tools"
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SNAPSHOT_PATH="$FLUTTER_ROOT/bin/cache/flutter_tools.snapshot"
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STAMP_PATH="$FLUTTER_ROOT/bin/cache/flutter_tools.stamp"
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SCRIPT_PATH="$FLUTTER_TOOLS_DIR/bin/flutter_tools.dart"
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DART_SDK_PATH="$FLUTTER_ROOT/bin/cache/dart-sdk"
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DART="$DART_SDK_PATH/bin/dart"
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(
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if hash flock 2>/dev/null; then
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flock 3 # ensures that we don't simultaneously update Dart in multiple parallel instances
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# some platforms (e.g. Mac) don't have flock or any reliable alternative
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fi
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REVISION=`(cd "$FLUTTER_ROOT"; git rev-parse HEAD)`
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if [ ! -f "$SNAPSHOT_PATH" ] || [ ! -f "$STAMP_PATH" ] || [ `cat "$STAMP_PATH"` != "$REVISION" ] || [ "$FLUTTER_TOOLS_DIR/pubspec.yaml" -nt "$FLUTTER_TOOLS_DIR/pubspec.lock" ]; then
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"$FLUTTER_ROOT/bin/cache/update_dart_sdk.sh"
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echo Building flutter tool...
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FLUTTER_DIR="$FLUTTER_ROOT/packages/flutter"
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(cd "$FLUTTER_TOOLS_DIR"; "../../bin/cache/dart-sdk/bin/pub" get --verbosity=warning)
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"$DART" --snapshot="$SNAPSHOT_PATH" --packages="$FLUTTER_TOOLS_DIR/.packages" "$SCRIPT_PATH"
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echo $REVISION > "$STAMP_PATH"
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fi
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) 3< $PROG_NAME
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if [ $FLUTTER_DEV ]; then
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"$DART" --packages="$FLUTTER_TOOLS_DIR/.packages" -c "$SCRIPT_PATH" "$@"
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else
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set +e
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"$DART" "$SNAPSHOT_PATH" "$@"
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# The VM exits with code 253 if the snapshot version is out-of-date.
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# If it is, we need to snapshot it again.
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EXIT_CODE=$?
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if [ $EXIT_CODE != 253 ]; then
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exit $EXIT_CODE
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fi
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set -e
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"$DART" --snapshot="$SNAPSHOT_PATH" --package="$FLUTTER_TOOLS_DIR/.packages" "$SCRIPT_PATH"
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"$DART" "$SNAPSHOT_PATH" "$@"
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fi
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