/// <summary>
/// Installs function app dependencies specified in functionAppRoot\requirements.psd1.
/// </summary>
internal void InstallFunctionAppDependencies(PowerShell pwsh, ILogger logger)
{
try
{
// Install the function dependencies.
logger.Log(LogLevel.Trace, PowerShellWorkerStrings.InstallingFunctionAppDependentModules, isUserLog: true);
if (Directory.Exists(DependenciesPath))
{
// Save-Module supports downloading side-by-size module versions. However, we only want to keep one version at the time.
// If the ManagedDependencies folder exits, remove all its contents.
DependencyManagementUtils.EmptyDirectory(DependenciesPath);
}
else
{
// If the destination path does not exist, create it.
Directory.CreateDirectory(DependenciesPath);
}
try
{
foreach (DependencyInfo module in Dependencies)
{
string moduleName = module.Name;
string latestVersion = module.LatestVersion;
// Save the module to the given path
pwsh.AddCommand("PowerShellGet\\Save-Module")
.AddParameter("Repository", Repository)
.AddParameter("Name", moduleName)
.AddParameter("RequiredVersion", latestVersion)
.AddParameter("Path", DependenciesPath)
.AddParameter("Force", true)
.AddParameter("ErrorAction", "Stop")
.InvokeAndClearCommands();
var message = string.Format(PowerShellWorkerStrings.ModuleHasBeenInstalled, moduleName, latestVersion);
logger.Log(LogLevel.Trace, message, isUserLog: true);
}
}
finally
{
// Clean up
pwsh.AddCommand(Utils.RemoveModuleCmdletInfo)
.AddParameter("Name", "PackageManagement, PowerShellGet")
.AddParameter("Force", true)
.AddParameter("ErrorAction", "SilentlyContinue")
.InvokeAndClearCommands();
}
}
catch (Exception e)
{
var errorMsg = string.Format(PowerShellWorkerStrings.FailToInstallFuncAppDependencies, e.Message);
_dependencyError = new DependencyInstallationException(errorMsg, e);
}
}
/// <summary>
/// Initializes the dependency manger and performs the following:
/// - Parse functionAppRoot\requirements.psd1 file and create a list of dependencies to install.
/// - Set the DependenciesPath which gets used in 'SetupWellKnownPaths'.
/// - Determines if the dependency module needs to be installed by checking the latest available version
/// in the PSGallery and the destination path (to see if it is already installed).
/// - Set the destination path (if running in Azure vs local) where the function app dependencies will be installed.
/// </summary>
internal void Initialize(FunctionLoadRequest request)
{
if (!request.ManagedDependencyEnabled)
{
return;
}
try
{
// Resolve the FunctionApp root path.
var functionAppRootPath = Path.GetFullPath(Path.Join(request.Metadata.Directory, ".."));
// Resolve the managed dependencies installation path.
DependenciesPath = GetManagedDependenciesPath(functionAppRootPath);
// Parse and process the function app dependencies defined in requirements.psd1.
Hashtable entries = ParsePowerShellDataFile(functionAppRootPath, RequirementsPsd1FileName);
foreach (DictionaryEntry entry in entries)
{
// A valid entry is of the form: 'ModuleName'='MajorVersion.*"
string name = (string)entry.Key;
string version = (string)entry.Value;
// Validates that the module name is a supported dependency.
ValidateModuleName(name);
// Validate the module version.
string majorVersion = GetMajorVersion(version);
string latestVersion = DependencyManagementUtils.GetModuleLatestSupportedVersion(name, majorVersion);
ValidateModuleMajorVersion(name, majorVersion, latestVersion);
// Before installing the module, check the path to see if it is already installed.
var moduleVersionFolderPath = Path.Combine(DependenciesPath, name, latestVersion);
if (!Directory.Exists(moduleVersionFolderPath))
{
_shouldUpdateFunctionAppDependencies = true;
}
// Create a DependencyInfo object and add it to the list of dependencies to install.
var dependencyInfo = new DependencyInfo(name, majorVersion, latestVersion);
Dependencies.Add(dependencyInfo);
}
}
catch (Exception e)
{
// Reset DependenciesPath and Dependencies.
DependenciesPath = null;
Dependencies.Clear();
var errorMsg = string.Format(PowerShellWorkerStrings.FailToInstallFuncAppDependencies, e.Message);
throw new DependencyInstallationException(errorMsg, e);
}
}
/// <summary>
/// Sets/prepares the destination path where the function app dependencies will be installed.
/// </summary>
internal void SetDependenciesDestinationPath(string path)
{
// Save-Module supports downloading side-by-size module versions. However, we only want to keep one version at the time.
// If the ManagedDependencies folder exits, remove all its contents.
if (Directory.Exists(path))
{
DependencyManagementUtils.EmptyDirectory(path);
}
else
{
// If the destination path does not exist, create it.
// If the user does not have write access to the path, an exception will be raised.
try
{
Directory.CreateDirectory(path);
}
catch (Exception e)
{
var errorMsg = string.Format(PowerShellWorkerStrings.FailToCreateFunctionAppDependenciesDestinationPath, path, e.Message);
throw new InvalidOperationException(errorMsg);
}
}
}
