igrigorik/heroku-buildpack-dart

Heroku buildpack for Dart

Heroku Buildpack: Dart

This is a Heroku buildpack for Dart.

(Note: This buildpack requires that you use the Cedar-14 (Ubuntu 14.x-based) stack for your Heroku application. This is now the default stack on Heroku.)

Features

• Runs Dart VM as a server in Heroku's cloud
• Installs packages with pub
• Builds the client app with webdev build

Getting Started

(These instructions assume you have the heroku tools and git installed, and that you have a heroku account.)

Create a Heroku app, and specify both this buildpack and a URL that points to a compiled Dart SDK.

Here is a set of commands that deploys a minimal HTTP server built with Dart to Heroku:

$> git clone https://github.com/igrigorik/heroku-buildpack-dart.git
$> mkdir myfirstdartappforheroku
$> cp -R heroku-buildpack-dart/test-app/* myfirstdartappforheroku
$> cd myfirstdartappforheroku
$> git init
$> git add -A .
$> git commit -am "first commit"
$> heroku create myfirstdartappforheroku
$> heroku config:set DART_SDK_URL=<archive url>
$> heroku config:add BUILDPACK_URL=https://github.com/igrigorik/heroku-buildpack-dart.git

Push the app to Heroku. Learn more about deploying to Heroku with git.

$> git push heroku master

You may need to scale to one web dyno (aka server):

$> heroku ps:scale web=1

Test your app! The URL is printed at the end of the git push step.

Configuration

Location of Dart SDK

You must specify a URL that points to a .zip that contains the Dart SDK. Links to Dart SDKs built for Linux are available.

$> heroku config:set DART_SDK_URL=<archive url>

Specifying the script

Create the file Procfile in the root of your package to define the file to run when the application starts. We recommend to put the server script into your application's bin/ directory.

The sample app's Procfile looks like:

web: ./dart-sdk/bin/dart bin/basic_http_server.dart

Add build_runner and build_web_compilers to you dev_dependencies in pubspec.yaml

dev_dependencies:
  build_runner:
  build_web_compilers: 
  ...

Specifying the pubspect.yaml

By default every pubspec.yaml will be processed.

You can define the environment variable PUBSPEC_PATH to specify which pubspec.yaml to process.

Overriding the build command

By default pub build is launched after pub get, it can be useful to use another command: for instance pub build --mode=debug or /app/dart-sdk/bin/dart build.dart:

$> heroku config:set DART_BUILD_CMD="/app/dart-sdk/bin/dart build.dart"

Example

See test-app directory for the world simplest Dart web app running on Heroku.

Learning more

Dart VM can access files, directories, sockets, HTTP, web sockets, SSL, and more. See the dart:io library for core functionality.

Dart's package repository, pub, hosts lots of options for more functionality, such as database drivers, HTTP server frameworks, templates, and more.

License

The MIT License - Copyright (c) 2012 Ilya Grigorik

heroku-buildpack-dart's Issues

Deployment fails because cannot download dartsdk-linux-64.tar.gz

I'm trying to install in Dokku and deployment fails because the download:

Installing Dart VM via URL http://commondatastorage.googleapis.com/dart-editor-archive-integration/latest/dartsdk-linux-64.tar.gz

fails ...

Trying to access it in the browser gives:

<Error>
  <Code>NoSuchKey</Code>
  <Message>The specified key does not exist.</Message>
</Error>

unzip:command not found

Hi, the following error. Сan you change the unzip command to something else?

SDK: zip detected

/tmp/buildpack_9520eff3abf40c9845cd9c0952f3cab7/bin/compile: line 62: unzip: command not found

! Push rejected, failed to compile Dart app

Dependencies not fount

On heroku log, example:

2016-08-11T14:21:45.030011+00:00 app[web.1]: [2016-08-11 14:21:45] ERROR `/packages/angular_ui/css/angular.css' not found.

Any idea?

cannot execute binary file: Exec format error

When I tried to push the app to Heroku, I continually receive an error that says "cannot execute binary file: Exec format error". I am attaching a screenshot of my terminal output; I believe that I have everything else set up correctly and that I am using the correct direct download URL. I initially installed Dart with Homebrew and I am using a Mac computer.

cannot stat /app/tmp/cache/dart-sdk

Following the steps listed, but I run into this error:

-----> Fetching custom git buildpack... done
-----> Dart app detected
-----> Welcome, this machine is: Linux 34101513-51f5-4c7c-bd31-3611dcf9f16a 3.8.11-ec2 #1 SMP Fri May 3 09:11:15 UTC 2013 x86_64 GNU/Linux
-----> Installing Dart VM via URL https://github.com/aoakenfo/dart-sdk/releases/download/1.0.0.10_r30798/dart-sdk.tar.gz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
114   343  114   343    0     0  10095      0 --:--:-- --:--:-- --:--:-- 24500tar: Removing leading `/' from member names
100  9.9M  100  9.9M    0     0  1637k      0  0:00:06  0:00:06 --:--:-- 1990k
-----> Copy Dart binaries to app root
cp: cannot stat `/app/tmp/cache/dart-sdk': No such file or directory

 !     Push rejected, failed to compile Dart app

To [email protected]:hello-heroku-dart.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to '[email protected]:hello-heroku-dart.git'

Additional info:

1. I built the original dart-sdk using ubuntu server 10.04.4 amd64. Should I be using x86?
2. Ignore the above DART_SDK_URL as I uploaded a dart-sdk binary from the dart team, which would have the mismatched glibc version according to the readme. I tried using this binary to see if I would get a different error and crash at runtime instead of copy.
3. I'm thinking it must be the dart-sdk binary I built - if I followed all other steps outlined it's the only differential. The community built binary deploys successfully.

Cannot stat pub-cache file

After I added a pubspec.yaml (which now seems required) I ran into this error:

sethladd:~/Code/dart-heroku-test (master)$ git push heroku master
Counting objects: 9, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (5/5), done.
Writing objects: 100% (7/7), 670 bytes, done.
Total 7 (delta 2), reused 0 (delta 0)

-----> Heroku receiving push
-----> Fetching custom git buildpack... done
-----> Dart app detected
-----> Installing Dart VM, build: latest
-----> Copy Dart binaries to app root
-----> Install packages
Resolving dependencies...
Dependencies installed!
cp: cannot stat `/app/tmp/repo.git/.cache/pub-cache': No such file or directory
! Heroku push rejected, failed to compile Dart app

To [email protected]:dart-test.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to '[email protected]:dart-test.git'

who to build dart with ubuntu 10.04

who to build dart with ubuntu 10.04? i get a error

cc1plus: warnings being treated as errors
runtime/vm/compiler.cc: In function ‘bool dart::CompileParsedFunctionHelper(dart::ParsedFunction_, bool, intptr_t)’:
runtime/vm/compiler.cc:266: error: variable ‘prev_deopt_id’ might be clobbered by ‘longjmp’ or ‘vfork’
At global scope:
cc1plus: error: unrecognized command line option "-Wno-conversion-null"
make: *_* [out/ReleaseX64/obj.target/libdart_vm/runtime/vm/compiler.o] Error 1
make: *** Waiting for unfinished jobs....
BUILD FAILED

Scaling dynos...failed on windows 7

heroku create myfirstdartappforheroku -s cedar
$> heroku ps:scale web=1

Scaling dynos... failed
! Internal server error.
! Run heroku status to check for known platform issues.

=== Heroku Status
Development: No known issues at this time.
Production: No known issues at this time.

Run the build.dart file when deploying?

I am wanting to add my .dart.js and .dart.js.map files to my .gitignore and not have them in my repository since they are generated files. The problem is that I am deploying my app to heroku and I need those files to be generated in order for the app to work. Does the build pack run the build.dart file if it exists?

App environment variable labs feature retired

App environment available in all builds https://devcenter.heroku.com/changelog-items/416

Can you take a look if this change in the heroku api affects the buildpack?

Test app doesn't serve correct static directory in Dart 1.3+

var pathToBuild = join(dirname(Platform.script.toFilePath()), '..', 'build');

Works great in SDK ~1.2 but fails in later versions.

var pathToBuild = join(dirname(Platform.script.toFilePath()), '..', 'build/web');

Works great in newer versions, but fails in ~1.3.

Do we assume latest or check to see if /web/ exists first?

Don't download the SDK if the local cache dir already has it

Saves time over multiple deploys.

version `GLIBC_2.15' not found

Followed http://blog.sethladd.com/2012/08/running-dart-in-cloud-with-heroku.html with the following error:

*** Found pubspec.yaml in .
/app/dart-sdk/bin/dart: /lib/libc.so.6: version `GLIBC_2.15' not found (required by /app/dart-sdk/bin/dart)
/app/dart-sdk/bin/dart: /lib/libc.so.6: version `GLIBC_2.14' not found (required by /app/dart-sdk/bin/dart)

 !     Push rejected, failed to compile Dart app

Is this related to issue 11880?

Thank you for building this helpful library.

Be able to override the "pub build" command

By default pub build is launched after the pub get, it can be usefull to use another command: for instance "pub build --mode=debug" or "/app/dart-sdk/bin/dart build.dart"

See discussion https://plus.google.com/u/0/+SethLadd/posts/7hMnq5ZyvXb?cfem=1

Deploy flutter web

FIXED - I forgot to add the bin/main.dart file as bootstrap for web app!

SORRY.

Hi,

I'm trying to deploy the classic hello world coming from flutter for web on heroku.
I'm able to build package but when starting the app with "./sdk-tools/bin/dart web/main.dart" the app start and send several errors. The same happen when running locally on windows 10 the command "dart web/main.dart" give the same error.
I was trying to use webdev (that work locally) but the installation from pub locate it in a cache folder not permitted by heroku.
Any suggestions?

Deploy dart app with private dependencies

Hello,
I would like to use heroku for my dart project. I need to split my project into multiple dart packages. The dart packages are private. What is the recommended approach to deploy the app to heroku?
Thank you!

mv cannot stat "dart/dart-sdk": No such file or directory

Now, the buildpack cannot compile dart app.

mv cannot stat "dart/dart-sdk": No such file or directory

It's caused by a change of the sdk archive. (https://storage.googleapis.com/dart-archive/channels/stable/release/42039/sdk/dartsdk-linux-x64-release.zip)

Before...

dart
  ...
  -dart-sdk
    -bin
    ...

but now is...

dart-sdk
  ...
  -bin
  ...

This change is only in the sdk archive. "Dart+Editor" archive is not changed, but it is very large.

Failed to build webdev:webdev

Hi:
I got the following error when i push to Heroku:

remote: Downloading webdev 2.7.8...
remote: Downloading sse 4.1.0...
remote: Downloading dds 2.2.0...
remote: Downloading dds_service_extensions 1.3.0...
remote: Downloading shelf_proxy 1.0.1...
remote: Downloading browser_launcher 1.1.0...
remote: Downloading json_rpc_2 3.0.1...
remote: Downloading dwds 12.1.1...
remote: Downloading _fe_analyzer_shared 34.0.0...
remote: Downloading devtools_shared 2.13.1...
remote: Downloading usage 4.0.2...
remote: Building package executables...
remote: Failed to build webdev:webdev:
remote: /app/pub-cache/hosted/pub.dartlang.org/dwds-12.1.1/lib/src/services/chrome_proxy_service.dart:540:24: Error: The method 'ChromeProxyService.getSourceReport' has fewer named arguments than those of overridden method 'VmServiceInterface.getSourceReport'.
remote: Future getSourceReport(String isolateId, List reports,
remote: ^

Sorry i'm Heroku rookie. i don't know how to set my pubspec.yaml with Config var from my project.

Could you tell me what should i do.

Thank you.

How about Flutter web app?

It is not clear if flutter web app is supported by the buildpack.
If it it is supported, can you please provide steps in README?
If it is not, can you say it explicitly in README?

cant deploy on heroku

*** Running webdev build
Building with "webdev build"
webdev could not run for this project.
The build_web_compilers version – 2.11.0 – is not within the allowed constraint – >=2.12.0 <4.0.0.
! Push rejected, failed to compile Dart app.
! Push failed

buildpack url

At least for me,

heroku config:add BUILDPACK_URL=[email protected]:igrigorik/heroku-buildpack-dart.git

did not work. However,

heroku config:add BUILDPACK_URL=https://github.com/igrigorik/heroku-buildpack-dart.git

works fine.

Ignore some pubspec.yaml to avoid failures

My repository contains three folders: flutter client, dart service and shared dart library. I want to run dart server, so I need to build just one pubspec.yaml.
It references the library, so library build will be triggered by service build.
However, the buildpack triggers build for all pubspec.yaml instances and the build for flutter client fails blocking the deployment.

It would be great to have a way to point just one pubspec or to ignore failures.

pubspec.yaml breaks with github repos

adding a dependency on github.com projects fail on git fetch with pub install. Looking into this issue, might have to do with the client that is provided on the heroku env.

Pub: command not found

remote: -----> Copy Dart binaries to app root
remote: -----> Dart cmd found at -rwx------ 1 u54379 dyno 40473040 May 24 09:46 /app/dart-sdk/bin/dart
remote: -----> Dart reports version: Dart SDK version: 2.17.1 (stable) (Tue May 17 17:58:21 2022 +0000) on "linux_x64"
remote: *** Found pubspec.yaml in /tmp/build_3c2b97e0/./api
remote: *** Running pub get
remote: /tmp/codon/tmp/buildpacks/19eae438cd2c24c0d0c9839b8cf39e357205c/bin/compile: line 43: pub: command not found
remote:  !     Push rejected, failed to compile Dart app.
remote: 
remote:  !     Push failed
remote: Verifying deploy...
remote: 
remote: !	Push rejected to Heroku-project.
remote: 

It seems like a problem with path to the Dart SDK. Im using Dart SDK version: 2.17.1 (stable).