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hack/make.ps1: fix Validate-PkgImports

In Go 1.10.1, the Deps for pkg\tarsum\tarsum_test.go are empty ([]) and
the PowerShell script ends up setting its import list to a string value
of False instead of an empty array. This can be remedied by forcing the
result to be an array, by concatenating to an empty array (@() + ...)

Signed-off-by: John Stephens <johnstep@docker.com>
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
(cherry picked from commit ec3f9230d70506c536a24e844da0f0b3af9b43f6)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

John Stephens authored on 2018/04/12 10:23:12
Showing 1 changed files
... ...
@@ -251,10 +251,10 @@ Function Validate-PkgImports($headCommit, $upstreamCommit) {
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         if ($LASTEXITCODE -ne 0) { Throw "Failed go list for dependencies on $file" }
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         $imports = $imports -Replace "\[" -Replace "\]", "" -Split(" ") | Sort-Object | Get-Unique
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         # Filter out what we are looking for
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-        $imports = $imports -NotMatch "^github.com/docker/docker/pkg/" `
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-                            -NotMatch "^github.com/docker/docker/vendor" `
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-                            -Match "^github.com/docker/docker" `
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-                            -Replace "`n", ""
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+        $imports = @() + $imports -NotMatch "^github.com/docker/docker/pkg/" `
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+                                  -NotMatch "^github.com/docker/docker/vendor" `
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+                                  -Match "^github.com/docker/docker" `
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+                                  -Replace "`n", ""
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         $imports | % { $badFiles+="$file imports $_`n" }
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     }
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     if ($badFiles.Length -eq 0) {