[Bug 1869878] [NEW] Space in username breaks wsl integration cache

[Wes Garland]

Public bug reported:

* What you're doing and what's happening:  launching bash from a user
whose name includes a space breaks /etc/profile.d/wsl-integration.sh

* What's wrong / what should be happening instead:

> PS C:\Users\Jack Troughton\git\dcp-jason> bash
> -bash: [: /mnt/c/Users/Jack: binary operator expected
> mkdir: cannot create directory ë/mnt/c/Users/Jackí: Permission denied
> -bash: $WSL_INTEGRATION_CACHE: ambiguous redirect
> 
> 

The reason it breaks is due to incorrect quoting around $HOME and things
derived from it.  It looks like you have parallel issues as well which
could break pulse audio on a machine with a space in its hostname (is
that legal in windows-land?)

I have created a zip file containing a fix, both the complete script and
a unified context diff.  I hereby place my changes in the public domain,
free for use by anybody for anything.

The fix is at http://people.kingsds.network/wesgarland/wsl-integration-
fix.zip

Windows build number: Microsoft Windows [Version 10.0.18362.720]

My WSL is the Ubuntu flavour of 
Linux version 4.4.0-18362-Microsoft (Microsoft at Microsoft.com) (gcc version 5.4.0 (GCC) ) #476-Microsoft Fri Nov 01 16:53:00 PST 2019

lsb_release -rd says
Description:    Ubuntu 18.04.4 LTS
Release:        18.04

apt-cache policy wslu says
wslu:
  Installed: (none)
  Candidate: 2.3.2-0ubuntu2~18.04.3
  Version table:
     2.3.2-0ubuntu2~18.04.3 500
        500 http://ca.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        500 http://ca.archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages

** Affects: wslu (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1869878

Title:
  Space in username breaks wsl integration cache

Status in wslu package in Ubuntu:
  New

Bug description:
  * What you're doing and what's happening:  launching bash from a user
  whose name includes a space breaks /etc/profile.d/wsl-integration.sh

  * What's wrong / what should be happening instead:

  > PS C:\Users\Jack Troughton\git\dcp-jason> bash
  > -bash: [: /mnt/c/Users/Jack: binary operator expected
  > mkdir: cannot create directory ë/mnt/c/Users/Jackí: Permission denied
  > -bash: $WSL_INTEGRATION_CACHE: ambiguous redirect
  > 
  > 

  The reason it breaks is due to incorrect quoting around $HOME and
  things derived from it.  It looks like you have parallel issues as
  well which could break pulse audio on a machine with a space in its
  hostname (is that legal in windows-land?)

  I have created a zip file containing a fix, both the complete script
  and a unified context diff.  I hereby place my changes in the public
  domain, free for use by anybody for anything.

  The fix is at http://people.kingsds.network/wesgarland/wsl-
  integration-fix.zip

  Windows build number: Microsoft Windows [Version 10.0.18362.720]

  My WSL is the Ubuntu flavour of 
  Linux version 4.4.0-18362-Microsoft (Microsoft at Microsoft.com) (gcc version 5.4.0 (GCC) ) #476-Microsoft Fri Nov 01 16:53:00 PST 2019

  lsb_release -rd says
  Description:    Ubuntu 18.04.4 LTS
  Release:        18.04

  apt-cache policy wslu says
  wslu:
    Installed: (none)
    Candidate: 2.3.2-0ubuntu2~18.04.3
    Version table:
       2.3.2-0ubuntu2~18.04.3 500
          500 http://ca.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
          500 http://ca.archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages

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