use default compression not working

[jondah]

I am trying to install chocolatey whitout 7-zip. Using $env:chocolateyUseWindowsCompression = 'true' prior running .\install.ps1 -UseNativeUnzip
Is there anything else I should run?

[gep13]

Can you confirm what Operating System you are installing onto, and what version of PowerShell you are using?

The reason that I ask is that 7zip is only attempted to be used when the version of PowerShell that is in play is less then PowerShell 5.

Also, what are you seeing that makes you think that 7zip is being used?

Can you share the output that you are seeing from the attempt to install Chocolatey?

[jondah]

Thanks for your reply

I still see 7z.exe under tools folder or is it just during installation you can use native unzip features?

C:\Users\username\Downloads> .\install.ps1 -UseNativeUnzip -Verbose
WARNING: 'choco' was found at 'C:\ProgramData\chocolatey\bin\choco.exe'.
WARNING: An existing Chocolatey installation was detected. Installation will not continue. This script will not overwrite existing installations.
If there is no Chocolatey installation at 'C:\ProgramData\chocolatey', delete the folder and attempt the installation again.

Please use choco upgrade chocolatey to handle upgrades of Chocolatey itself.
If the existing installation is not functional or a prior installation did not complete, follow these steps:
 - Backup the files at the path listed above so you can restore your previous installation if needed.
 - Remove the existing installation manually.
 - Rerun this installation script.
 - Reinstall any packages previously installed, if needed (refer to the lib folder in the backup).

Once installation is completed, the backup folder is no longer needed and can be deleted.

C:\Users\username\Downloads> .\install.ps1 -UseNativeUnzip -Verbose
Forcing web requests to allow TLS v1.2 (Required for requests to Chocolatey.org)
Getting latest version of the Chocolatey package for download.
Not using proxy.
Getting Chocolatey from https://community.chocolatey.org/api/v2/package/chocolatey/2.2.2.
Downloading https://community.chocolatey.org/api/v2/package/chocolatey/2.2.2 to C:\Users\username\AppData\Local\Temp\chocolatey\chocoInstall\chocolatey.zip
Not using proxy.
Extracting C:\Users\username\AppData\Local\Temp\chocolatey\chocoInstall\chocolatey.zip to C:\Users\username\AppData\Local\Temp\chocolatey\chocoInstall
Installing Chocolatey on the local machine
VERBOSE: Removing the imported "Initialize-Chocolatey" function.
VERBOSE: Loading module from path 'C:\Users\username\AppData\Local\Temp\chocolatey\chocoInstall\tools\chocolateysetup.psm1'.
VERBOSE: Importing function 'Initialize-Chocolatey'.
Creating ChocolateyInstall as an environment variable (targeting 'Machine')
  Setting ChocolateyInstall to 'C:\ProgramData\chocolatey'
WARNING: It's very likely you will need to close and reopen your shell
  before you can use choco.
Restricting write permissions to Administrators
We are setting up the Chocolatey package repository.
The packages themselves go to 'C:\ProgramData\chocolatey\lib'
  (i.e. C:\ProgramData\chocolatey\lib\yourPackageName).
A shim file for the command line goes to 'C:\ProgramData\chocolatey\bin'
  and points to an executable in 'C:\ProgramData\chocolatey\lib\yourPackageName'.

Creating Chocolatey folders if they do not already exist.

chocolatey.nupkg file not installed in lib.
 Attempting to locate it from bootstrapper.
Chocolatey (choco.exe) is now ready.
You can call choco from anywhere, command line or powershell by typing choco.
Run choco /? for a list of functions.
You may need to shut down and restart powershell and/or consoles
 first prior to using choco.
Ensuring Chocolatey commands are on the path
Ensuring chocolatey.nupkg is in the lib folder`

[gep13]

@jondah said...
I still see 7z.exe under tools folder or is it just during installation you can use native unzip features?

Yes, the $env: chocolateyUseWindowsCompression environment variable only applies during the installation of the Chocolatey package. The way that Chocolatey is deployed is that the *.nupkg file (which is essentially a zip file) is downloaded, and then extracted to the required location. This extraction is done either using native compression tools, or by downloading 7zip.

However, as part of the Chocolatey package, we also ship 7zip, as it is a requirement for some of the built-in compression cmdlets that Chocolatey provides, for example Get-ChocolateyUnZip. Without 7zip in place, some packages would fail to install.