bugfix: error checking was broken by release 1.7.1 (c8776b42c0)

backup.ps1

@@ -12,6 +12,9 @@ $ConfigScript = Join-Path $PSScriptRoot "config.ps1"
 
 # =========== end configuration =========== #
 
+# make LASTEXITCODE global to enable error checking for Invoke-Expression commands
+$global:LASTEXITCODE=0
+
 # globals for state storage
 $Script:ResticStateRepositoryInitialized = $null
 $Script:ResticStateLastMaintenance = $null
@@ -94,9 +97,15 @@ function Invoke-Unlock {
     Param($SuccessLog, $ErrorLog)
 
     $locks = Invoke-Expression "$Script:ResticExe list locks --no-lock -q 3>&1 2>> $ErrorLog"
+    if($LASTEXITCODE) {
+        "[[Unlock]] Warning: unable to list locks." | Tee-Object -Append $ErrorLog
+    }
     if($locks.Length -gt 0) {
         # unlock the repository (assumes this machine is the only one that will ever use it)
         Invoke-Expression "$Script:ResticExe unlock 3>&1 2>> $ErrorLog | Out-File -Append $SuccessLog"
+        if($LASTEXITCODE) {
+            "[[Unlock]] Error - unable to unlock repository." | Tee-Object -Append $ErrorLog
+        }
         "[[Unlock]] Repository was locked. Unlocking." | Tee-Object -Append $ErrorLog | Out-File -Append $SuccessLog
         Start-Sleep 120
     }
@@ -142,7 +151,7 @@ function Invoke-Maintenance {
     # forget snapshots based upon the retention policy
     "[[Maintenance]] Start forgetting..." | Out-File -Append $SuccessLog
     Invoke-Expression "$Script:ResticExe forget $SnapshotRetentionPolicy 3>&1 2>> $ErrorLog | Out-File -Append $SuccessLog"
-    if(-not $?) {
+    if($LASTEXITCODE) {
         "[[Maintenance]] Forget operation completed with errors" | Tee-Object -Append $ErrorLog | Out-File -Append $SuccessLog
         $maintenance_success = $false
     }
@@ -151,7 +160,7 @@ function Invoke-Maintenance {
     #   `forget` only prunes when it detects removed snapshots upon invocation, not previously removed
     "[[Maintenance]] Start pruning..." | Out-File -Append $SuccessLog
     Invoke-Expression "$Script:ResticExe prune $SnapshotPrunePolicy 3>&1 2>> $ErrorLog | Out-File -Append $SuccessLog"
-    if(-not $?) {
+    if($LASTEXITCODE) {
         "[[Maintenance]] Prune operation completed with errors" | Tee-Object -Append $ErrorLog | Out-File -Append $SuccessLog
         $maintenance_success = $false
     }
@@ -178,8 +187,8 @@ function Invoke-Maintenance {
     }
 
     Invoke-Expression "$Script:ResticExe check $data_check 3>&1 2>> $ErrorLog | Out-File -Append $SuccessLog"
-    if(-not $?) {
-        "[[Maintenance]] Check completed with errors" | Tee-Object -Append $ErrorLog | Tee-Object -Append $SuccessLog | Write-Host
+    if($LASTEXITCODE) {
+        "[[Maintenance]] Data check completed with errors" | Tee-Object -Append $ErrorLog | Tee-Object -Append $SuccessLog | Write-Host
         $maintenance_success = $false
     }
 
@@ -189,7 +198,7 @@ function Invoke-Maintenance {
         # check for updated restic version
         "[[Maintenance]] Checking for new version of restic..." | Out-File -Append $SuccessLog
         Invoke-Expression "$Script:ResticExe self-update 3>&1 2>> $ErrorLog | Out-File -Append $SuccessLog"
-        if(-not $?) {
+        if($LASTEXITCODE) {
             "[[Maintenance]] Self-update of restic.exe completed with errors" | Tee-Object -Append $ErrorLog | Out-File -Append $SuccessLog
             $maintenance_success = $false
         }
@@ -298,7 +307,7 @@ function Invoke-Backup {
         else {
             # Launch Restic
             Invoke-Expression "$Script:ResticExe backup $folder_list $vss_option --tag $tag --exclude-file=$WindowsExcludeFile --exclude-file=$LocalExcludeFile $AdditionalBackupParameters 3>&1 2>> $ErrorLog | Out-File -Append $SuccessLog"
-            if(-not $?) {
+            if($LASTEXITCODE) {
                 "[[Backup]] Completed with errors" | Tee-Object -Append $ErrorLog | Tee-Object -Append $SuccessLog | Write-Host
                 $return_value = $false
             }

install.ps1

@@ -20,23 +20,32 @@ $ConfigScript = Join-Path $PSScriptRoot "config.ps1"
 $ResticExe = Join-Path $InstallPath $ExeName
 $LogPath = Join-Path $InstallPath "logs"
 
+# make LASTEXITCODE global to enable error checking for Invoke-Expression commands
+$global:LASTEXITCODE=0
+
 # =========== end configuration =========== #
 
 # download restic
 if(-not (Test-Path $ResticExe)) {
     $url = $null
     if([Environment]::Is64BitOperatingSystem){
-        $url = "https://github.com/restic/restic/releases/download/v0.17.3/restic_0.17.3_windows_amd64.zip"
+        $url = "fixmetestingnotrealhttps://github.com/restic/restic/releases/download/v0.17.3/restic_0.17.3_windows_amd64.zip"
     }
     else {
         $url = "https://github.com/restic/restic/releases/download/v0.17.3/restic_0.17.3_windows_386.zip"
     }
+    try {
         $output = Join-Path $InstallPath "restic.zip"
         Invoke-WebRequest -Uri $url -OutFile $output
         Expand-Archive -LiteralPath $output $InstallPath
         Remove-Item $output
         Get-ChildItem *.exe | Rename-Item -NewName $ExeName
     }
+    catch {
+        Write-Error "[[Install]] restic.exe download failed. Check errors and resolve: $_"
+        exit 1
+    }
+}
 
 # Apply global paramters to $ResticExe, after the $ResticExe has been downloaded/confirmed to exist
 if(-not [String]::IsNullOrEmpty($GlobalParameters)) {
@@ -47,6 +56,9 @@ if(-not [String]::IsNullOrEmpty($GlobalParameters)) {
 # This is enabled by default unless configuration disables self-update
 if ([String]::IsNullOrEmpty($SelfUpdateEnabled) -or ($SelfUpdateEnabled -eq $true)) {
     Invoke-Expression "$ResticExe self-update"
+    if($LASTEXITCODE) {
+        Write-Warning "[[Update]] Restic self-update failed. Check errors and resolve: $_"
+    }
 }
 
 # Create log directory if it doesn't exit
@@ -62,11 +74,11 @@ if(-not (Test-Path $LocalExcludeFile)) {
 
 # Initialize the restic repository
 Invoke-Expression "$ResticExe --verbose init"
-if($?) {
-    Write-Output "[[Init]] Repository successfully initialized."
+if($LASTEXITCODE) {
+    Write-Warning "[[Init]] Repository initialization failed. Check errors and resolve: $_"
 }
 else {
-    Write-Warning "[[Init]] Repository initialization failed. Check errors and resolve."
+    Write-Output "[[Init]] Repository successfully initialized."
 }
 
 # Scheduled Windows Task Scheduler to run the backup
@@ -82,7 +94,7 @@ if($null -eq $backup_task) {
         Write-Output "[[Scheduler]] Backup task scheduled."
     }
     catch {
-        Write-Warning "[[Scheduler]] Scheduling failed."
+        Write-Error "[[Scheduler]] Setting up backup task schedule failed: $_"
     }
 }
 else {