Invalidate & regenerate script snapshots for globally installed dart apps

[DartBot]

<img src="https://avatars.githubusercontent.com/u/5757092?v=3" align="left" width="96" height="96"hspace="10"> Issue by mkustermann
Originally opened as dart-lang/sdk#21904

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Reproduction on my machine:

$ pub global activate -sgit https://github.com/dart-lang/dart_style
$ dartformat
Wrong script snapshot version, expected 'f6711525cff9f7d0d08595166664b767' found '74629058babcf012a75ec8e5b364e464'

Pub should make sure to invalidate script snapshots and re-generate them (on demand) when the dart binary changed.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/5757092?v=3" align="left" width="48" height="48"hspace="10"> Comment by mkustermann

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Added Area-Pub label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/5757092?v=3" align="left" width="48" height="48"hspace="10"> Comment by mkustermann

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For completeness:

$ which dartformat
/usr/.../kustermann/.pub-cache/bin/dartformat
$ cat $(which dartformat)

#!/usr/bin/env sh

This file was created by pub v1.9.0-dev.0.0.

Package: dart_style

Version: 0.1.0-dev

Executable: dartformat

Script: format

dart "/usr/local/google/home/kustermann/.pub-cache/global_packages/dart_style/bin/format.dart.snapshot" "$@"

[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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Removed Priority-Unassigned label.
Added Priority-High label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/188?v=3" align="left" width="48" height="48"hspace="10"> Comment by nex3

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Try upgrading pub to the latest bleeding edge and running "pub cache repair". This should have been fixed in dart-lang/sdk@c0e3d5f.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/5757092?v=3" align="left" width="48" height="48"hspace="10"> Comment by mkustermann

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It works, but the fact that it prints

"Wrong script snapshot version, expected 'f6711525cff9f7d0d08595166664b767' found 'a3a313ea90040f8a3aaa5f443ecbb3db'"

is not nice at all.

One way of avoiding this would be to add something like "dart --test-snapshot-compatibility file.snapshot", so one can ask the VM whether it can read the snapshot, instead of just trying to run it and see what happens :-/

If one would implement this, you could also use "exec dart ..." instead.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/188?v=3" align="left" width="48" height="48"hspace="10"> Comment by nex3

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I agree. I filed issue dart-lang/sdk#20802 and issue dart-lang/sdk#20784 when we first started supporting snapshots, but nothing has happened there.

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Added Fixed label.