ProcessException: The system cannot find the file specified during `tool/get`

D-Elyes commented 4 years ago

Hello, i encounter this error when running flutter pub run tool/get -s 2019c

INFO: 2020-03-30 11:48:40.367549: Creating temp directory INFO: 2020-03-30 11:48:40.386498: Temp directory created: C:\Users\edoudech\AppData\Local\Temp\1\tzdata-a107c7fb-726b-11ea-97e5-48f17f21bc99 INFO: 2020-03-30 11:48:40.386498: Downloading timezone data INFO: 2020-03-30 11:48:41.181374: Unpacking timezone data: C:\Users\edoudech\AppData\Local\Temp\1\tzdata-a107c7fb-726b-11ea-97e5-48f17f21bc99\tzdata2019c.tar.gz INFO: 2020-03-30 11:48:41.360893: Creating zic directory INFO: 2020-03-30 11:48:41.362886: Compiling timezone data with zic compiler INFO: 2020-03-30 11:48:41.362886: - africa CreateProcessW failed 2 INFO: 2020-03-30 11:48:41.368871: Cleaning up temporary directories Unhandled exception: ProcessException: The system cannot find the file specified.

Command: zic -d C:\Users\edoudech\AppData\Local\Temp\1\tzdata-a107c7fb-726b-11ea-97e5-48f17f21bc99\zic C:\Users\edoudech\AppData\Local\Temp\1\tzdata-a107c7fb-726b-11ea-97e5 -48f17f21bc99\africa

0 zic (file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/timezone-0.5.6/tool/get.dart:80:18)
#1 main (file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/timezone-0.5.6/tool/get.dart:122:13) #2 _startIsolate. (dart:isolate-patch/isolate_patch.dart:299:32) #3 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12) pub finished with exit code 255

jamesncl commented 4 years ago

This is because the tool which builds the timezone database relies on an application called zic, which is not included in Windows. So, as far as I know, this is a Windows only issue.

Here's what I did to work around the issue. On Windows 10, install / fire up Ubuntu on Windows Subsystem for Linux (WSL). Then in the ubuntu shell window:

Install Dart and add to PATH

sudo apt-get update
sudo apt-get install apt-transport-https
sudo sh -c 'curl https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -'
sudo sh -c 'curl https://storage.googleapis.com/download.dartlang.org/linux/debian/dart_stable.list > /etc/apt/sources.list.d/dart_stable.list'
sudo apt-get update
sudo apt-get install dart
echo 'export PATH="$PATH:/usr/lib/dart/bin"' >> ~/.profile

Close the Ubuntu / WSL window, and open it up again, so the PATH changes are applied.

Clone the timezone repo and run the tool

git clone https://github.com/srawlins/timezone.git
cd timezone
pub run tool/get -s 2020a

replace 2020a with the latest version

Copy files to Windows file system

The timezone databases are generated and stored in lib/data in the timezone folder on WSL, so copy them from the WSL filesystem to your flutter project on your Windows file system. I chose to put them in a folder called assets in the root of my project:

mv lib/data/2020a* /mnt/d/code/my-flutter-project/assets/timezone/

replace 2020a with whatever version you used earlier
there are 3 databases (see here for an explanation) so I'm using wildcard * to copy all three at the same time - you may only want to copy one of them
/mnt/d/code/my-flutter-project is the location of my flutter project on my Windows D drive, so change as necessary
create an assets folder if it doesn't exist

Include the database as an asset

Add the database asset in pubsepc.yaml:

  assets:
    - assets/timezone/2020a.tzf

I decided to use the 2020a.tzf version, change as necessary (see here for an explanation)

Initialise the database

The rest should work as per the instructions for the timezone package. For example, initialise the library:

var byteData = await rootBundle.load('assets/timezone/2020a.tzf');
initializeDatabase(byteData.buffer.asUint8List());

dJani97 commented 3 years ago

A link to this guide should be totally added to the documentation.

srawlins / timezone