I have my project in github. I already created it like a library (Dart). Now I am trying to use my library in one of my project.
After i add all the necessary comments to get it from my git source, pub get is giving the following error,
Warning: Package <library_name> does not have a "lib" directory so you will not be able to import any libraries from it.
Got dependencies!
Any clue???
Thanks,
Tham
When importing libraries, the files you import come from the lib folder.
Eg:
import 'package:danny/danny.dart';
will import the file lib/danny.dart from the danny package.
If the package doesn't have a lib folder; this means you can't possibly import it. If you're importing directly from a Git repo; you need to ensure the lib folder is a top-level folder.
Related
I have some code that i want to use between two projects. I would like to break this out into a package and import it into other projects/packages that need it. When i try to import a locally created package, I get a "The target URI doesnt exist" error. What do i need to do? Is there a path environment variable that dart checks to find local packages? Do i need to publish my package to pub.dev and use "dart pub add"? (I really would not prefer this)
Thanks in advance
The dependencies section of pubspec.yaml supports, along with the pub.dev and Git options, a path option.
Path dependencies are documented on the Dart website.
For example:
dependencies:
hosted_package: ^1.0.0
local_package:
path: ../my_local_package
My folder structure looks like this:
lib\
my_library.dart
web\
index.html
main.dart
pubspec.yaml
In main.dart, I'm currently importing my_library.dart (which has library my_library at the top) by doing:
import '../lib/my_library.dart';
This works fine. However, it feels a bit fragile to have this relative path. I read in the Pub Package Layout Conventions that I can probably use import 'package:blah'; it says:
When you use libraries from within your own package, even code in src, you can (and should) still use "package:" to import them
So, I tried changing my code to this:
import 'package:my_library.dart';
However, in Chrome Dev Editor I get:
Target or URI does not exist: 'package:grid_data.dart'
and in Dartium I get:
GET http:// 127.0.0.1:51792/MyProject/web/packages/my_library.dart 404 (Not Found)
What's the correct way to import something from my lib folder from other dart files in my project?
You are missing the package name
import 'package:my_project/my_library.dart';
The package: part in your import statement references the packages folder in your my_project package (the folder that contains the pubspec.yaml. The remainder of the import statement is the path to the file you want to import.
You can browse through the folders and files in this packages folder in DartEditor or a file manager to see exactly how the files are organized.
This folder also contains a symlink named my_project which points to your my_project/lib folder.
I have developed a simple library (called picasawebalbums) that I wish to import in another web application.
I have added the the following to pubspect.yaml
picasawebalbums:
path: C:\Users\hangs_000\Documents\GitHub\PicasaWebAlbums
But the package does not appear under the 'packages' directory and of course my dart code cannot import any of the classes.
I feel that I have missed out a step somewhere.
Try pub get --verbose or pub upgrade --verbose from command line in your application directory and look at the output. You can try without --verbose first. This prints much less but may offer a hint anywhere.
When I try to import a package with the syntax import 'package:markdown/markdown.dart';, I get no error in Dart Editor but when I run the dart application, the debugger shows me the message:
An error occurred loading file: package:markdown/markdown.dart
Failed to load resource
chrome-extension://gfjabgeipkcfopofkhjimepepnomcidk/dart/packages/markdown/markdown.dart
But when I write the whole path (import "../../packages/markdown/markdown.dart";) everything works fine. I cannot understand why the syntax package: doesn't work in my code though it works in Dart Editor's own examples.
You can see the Chrome app architecture below (I'm loading a package from translator.dart):
You should have the package added as a dependency in pubspec.yaml (which I assume you do).
Also try running following:
delete packages folder
delete pubspec.lock
run pub get to fetch the
dependencies again.
I think in your md_to_html folder you need a link to the 'packages' directory for the shortform to work. I seem to remember this happening when the workspace is built but I'm not sure now which command triggers it, have a look at the current pub docs.
I want to use Facebook SDK on XCode 4.5 for integration with iOS6.
I read this tutorial. I was using this .dmg package to install the library but I need to track and read the implementation of some methods, so I noticed that there is a repo on Github with the current source code.
My problem is that I don't know how to install this properly as with the package .dmg. Any ideas on how to do it? I tried to just import the src folder and reference the whole project but I'm having a lot of issues, warnings and errors.
Update
I had to do this again, so now I made it work. Here is what I did:
I tried both ways, building the source code (1) and importing the files directly(2). On the first scenario it was easy, on the root folder of Github repo just run:
sudo scripts/build_framework.sh
You will get the files needed, the same that you get when installing with .pkg. But I needed to track the functions, so I tried to importing the files.
First I added the src folders from the Github repo on my project. I had an issue with duplicated definitions on every file. The problem was on my Build Settings (BS), I was still referencing to the .pkg install directory of Facebook so I had the files duplicated. I removed every reference to that folder on BS and then added the files.
After that, on the files that imported the Facebook files I got:
Undefined symbols for architecture i386
When I copied the files to XCode, the .m files where not automatically added to the Build Phases / Compile Sources. I added them manually and imported FBConnect.h on my files.
Hope it helps some one with the same issue.
If you include the FacebookSDK via git, you will need to build the framework. Run the following command from within the FacebookSDK directory:
scripts/build_framework.sh
Then, FacebookSDK.framework will appear in FacebookSDK/build
Add the entire src folder to your project. Import FBConnect.h in any class where you want to use Facebook. The connect class imports the rest of the necessary classes.
#import "FBConnect.h"