GASATHON/scripts/helpers/incremental_checks.ps1

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# This is meant to be used with build.ps1, and is not a standalone script.
function check-FileForChanges
{
param(
[Parameter(Mandatory=$true)]
[string]$path_file
)
if (-not (Test-Path $path_file -PathType Leaf)) {
Write-Error "The provided path is not a valid file: $path_file"
return $false
}
$file_name = Split-Path $path_file -Leaf
$path_csv = Join-Path $path_build ($file_name + "_file_hash.csv")
$csv_file_hash = $null
if (Test-Path $path_csv) {
$csv_file_hash = Import-Csv $path_csv | Select-Object -ExpandProperty value
}
$current_hash_info = Get-FileHash -Path $path_file -Algorithm MD5
$current_file_hash = $current_hash_info.Hash
# Save the current hash to the CSV
[PSCustomObject]@{
name = $path_file
value = $current_file_hash
} | Export-Csv $path_csv -NoTypeInformation
if ($csv_file_hash -and $csv_file_hash -eq $current_file_hash) {
return $false
} else {
return $true
}
}
# Check to see if the module has changed files since the last build
function check-ModuleForChanges
{
param( [string]$path_module, [array]$excludes )
$module_name = split-path $path_module -leaf
$path_csv = Join-Path $path_build ($module_name + "_module_hashes.csv")
$csv_file_hashes = $null
if ( test-path $path_csv ) {
$csv_file_hashes = @{}
import-csv $path_csv | foreach-object {
$csv_file_hashes[ $_.name ] = $_.value
}
}
$file_hashes = @{}
get-childitem -path $path_module -recurse -file -Exclude $excludes | foreach-object {
$id = $_.fullname
$hash_info = get-filehash -path $id -Algorithm MD5
$file_hashes[ $id ] = $hash_info.Hash
}
$file_hashes.GetEnumerator() | foreach-object { [PSCustomObject]$_ } |
export-csv $path_csv -NoTypeInformation
if ( -not $csv_file_hashes ) { return $true }
if ( $csv_file_hashes.Count -ne $file_hashes.Count ) { return $true }
foreach ( $key in $csv_file_hashes.Keys ) {
if ( $csv_file_hashes[ $key ] -ne $file_hashes[ $key ] ) {
return $true
}
}
return $false
}