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Define $IsWindows if not defined.

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The `$IsWindows` PowerShell variable was added in PowerShell Core 6 and
PowerShell 7, and is not present in earlier PowerShell versions. Set to
true if undefined. This fixes https://github.com/espressif/esp-idf/issues/7820.

The first version to run on non-Windows platforms was PowerShell Core
6.0[^1] which means that IsWindows is guaranteed to be defined on all
non-Windows systems. So, if undefined this indicates a Windows platform.

[^1]: https://docs.microsoft.com/en-us/powershell/scripting/install/powershell-support-lifecycle?view=powershell-7.2#release-history

Closes https://github.com/espressif/esp-idf/pull/7858

Closes https://github.com/espressif/esp-idf/issues/7820
This commit is contained in:
Chris Mumford 2021-11-08 18:47:35 -08:00 committed by Roland Dobai
parent 35a949ea66
commit ddf79c2be9
1 changed files with 5 additions and 0 deletions
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export.ps1
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@ -23,6 +23,11 @@ foreach ($line in $envars_raw) {
$envars_array += (, ($var_name, $var_val))
}
if ($IsWindows -eq $null) {
# $IsWindows was added in PowerShell Core 6 and PowerShell 7.
$IsWindows = $true
}
foreach ($pair in $envars_array) {
# setting the values
$var_name = $pair[0].Trim() # trim spaces on the ends of the name