Make command-line apps in packages available directly on the user's PATH

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="96" height="96"hspace="10"> Issue by munificent
Originally opened as dart-lang/sdk#18539

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Once pub run is working and can run arbitrary command-line apps in packages, the next step is to not require an explicit "pub run ...". Instead, the application can be placed directly on the user's path.

For example, using npm you can install coffeescript like so:

$ npm install -g coffee-script

Once you do that, it places a "coffee" command in your PATH so you can do:

$ coffee ...

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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Marked this as blocking #407.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/444270?v=3" align="left" width="48" height="48"hspace="10"> Comment by seaneagan

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Will this support adding scripts from "path" (instead of "hosted") dependencies to your PATH?

For why I need that, see issue #1020.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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I have a TODO in the code for it, but nothing beyond that. Can you file a separate tracking bug? Thanks!

[DartBot]

<img src="https://avatars.githubusercontent.com/u/444270?v=3" align="left" width="48" height="48"hspace="10"> Comment by seaneagan

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Filed issue #1044 for supporting all package sources in "pub global activate".

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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Thanks!

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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Added Started label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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This is (finally) landed! Details and docs forthcoming!

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Added Fixed label.