Docs don't mention docker-compose also requires read permission.

[XavierTalpe]

When installing docker-compose on Ubuntu I ran into the following problem:

Cannot open self /usr/local/bin/docker-compose or archive /usr/local/bin/docker-compose.pkg

Based on some Googling and information in #1135, adding the read permission solved the issue for me and other people.

[GordonTheTurtle]

Please sign your commits following these rules:
https://github.com/docker/docker/blob/master/CONTRIBUTING.md#sign-your-work
The easiest way to do this is to amend the last commit:

$ git clone -b "bugfix/CannotOpenSelf" git@github.com:XavierTalpe/compose.git somewhere
$ cd somewhere
$ git rebase -i HEAD~3
editor opens
change each 'pick' to 'edit'
save the file and quit
$ git commit --amend -s --no-edit
$ git rebase --continue # and repeat the amend for each commit
$ git push -f

Ammending updates the existing PR. You DO NOT need to open a new one.

[aanand]

Looks like this needs a rebase.

[dnephin]

How did you download the binary? It's very strange that it would be downloaded without read permissions. Are you sure the issue wasn't the user ownership ?

[XavierTalpe]

@dnephin Good point. I redid the steps I did yesterday and now it seems to work... /confused. The read flag is indeed set by default. Not sure how I managed to run into this issue. I guess this PR can be closed as invalid.

[aanand]

I suppose it wouldn't hurt to add +rx though?

[dnephin]

Since it's not necessary, I think it might just serve to confuse people instead of actually fixing anything.