PowerShell module with helper functions to deal with AWS S3

mod_s3.psm1

####################
# EXTERNAL MODULES #
####################

# https://docs.aws.amazon.com/powershell/latest/reference/Index.html

if (-not (Get-Module -ListAvailable -Name AWSPowerShell)) {
    "AWS module is not installed. Let's get it installed..."
    Install-Module -Name AWSPowerShell
}


####################
# HELPER FUNCTIONS #
####################

# https://docs.aws.amazon.com/powershell/latest/reference/items/Get-S3ObjectMetadata.html
# https://docs.aws.amazon.com/powershell/latest/reference/items/Read-S3Object.html

function Get-RemoteVersionCatalogMetadata {
    return Get-S3ObjectMetadata `
               -Region $env:APP_S3_REGION `
               -AccessKey $env:APP_S3_ACCESS_KEY `
               -SecretKey $env:APP_S3_SECRET_KEY `
               -BucketName $env:APP_S3_BUCKET `
               -Key configs/dummyapp-version-catalog.json `
               -ErrorAction Stop
}
function Read-RemoteVersionCatalog ($LocalFilePath) {
    $_ = Read-S3Object `
             -Region $env:APP_S3_REGION `
             -AccessKey $env:APP_S3_ACCESS_KEY `
             -SecretKey $env:APP_S3_SECRET_KEY `
             -BucketName $env:APP_S3_BUCKET `
             -Key configs/dummyapp-version-catalog.json `
             -File $LocalFilePath `
             -ErrorAction Stop

    if ($_) {
        "Download has completed: $LocalFilePath."
    }
}

function Read-RemotePackage ($Version, $LocalFilePath) {
    $_ = Read-S3Object `
             -Region $env:APP_S3_REGION `
             -AccessKey $env:APP_S3_ACCESS_KEY `
             -SecretKey $env:APP_S3_SECRET_KEY `
             -BucketName $env:APP_S3_BUCKET `
             -Key releases/$Version.zip `
             -File $LocalFilePath `
             -ErrorAction Stop

    if ($_) {
        "Download has completed: $LocalFilePath."
    }
}