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CheckMK Installer/Updater in Powershell

SNIPPET_TEXT:

1. #
2. # Install/Upgrade Check-MK-Agent from URL
3. #
4.  
5. function get_installed_software_info {
6.         param (
7.                 [string]$pattern
8.         )
9.     $data = Get-ItemProperty $global:reg_key_sw_uninstall  |
10.         Select-Object DisplayName, DisplayVersion          |
11.         Where-Object{$_.DisplayName -match $pattern}
12.     if ($data) {
13.         return @{
14.             name    = $data.DisplayName.Trim()
15.             version = $data.DisplayVersion.Trim()
16.             }
17.     }
18. }
19.  
20. function get_msi_db_property {
21.     param (
22.         $msidb,                       # opened msi database object System.__ComObject
23.         [string]$wanted_property      # wanted property of the MSI file
24.     )
25.     $view=$null
26.     $query = "SELECT Value FROM Property WHERE Property = '$($wanted_property)'"
27.    
28.     $view = $msidb.GetType().InvokeMember('OpenView', 'InvokeMethod', $null, $msidb, ($query))
29.  
30.     $view.GetType().InvokeMember('Execute', 'InvokeMethod', $null, $view, $null)
31.  
32.     $record = $view.
33.         GetType().
34.         InvokeMember('Fetch', 'InvokeMethod', $null, $view, $null)
35.  
36.     $value  = $record.
37.         GetType().
38.         InvokeMember('StringData', 'GetProperty', $null, $record, 1)
39.  
40.     return $value
41.  
42. }
43.  
44. function get_msi_product_info {
45.     param (
46.         [string]$msi_path
47.     )
48.  
49.     $installer = New-Object -ComObject WindowsInstaller.Installer
50.     $msidb= $installer.GetType().InvokeMember('OpenDatabase', 'InvokeMethod', $null, $installer, @($msi_path, 0))
51.  
52.     $product_version = get_msi_db_property -msidb $msidb -wanted_property "ProductVersion" | Out-String
53.     $product_name    = get_msi_db_property -msidb $msidb -wanted_property "ProductName"    | Out-String
54.    
55.     return @{
56.                 name=$product_name.Trim()
57.              version=$product_version.Trim()
58.              }
59. }
60.  
61. function get_installed_checkmk_agent_info {
62.     $c = get_installed_software_info -pattern "Check MK Agent.*"
63.     return $c
64. }
65.  
66. function uninstall_checkmk_agent {
67.     $application = Get-WmiObject -Class Win32_Product | Where-Object {$_.Name -match "Check MK Agent.*"}
68.     if ($application) {
69.         $application.Uninstall()
70.     }
71. }
72.  
73. function install_msi_package {
74.     param(
75.         [string]$msi_path
76.     )
77.     msiexec /I $msi_path /qn
78.  
79. }
80.  
81. function mylog {
82.     $logline = ( $(Get-Date -Format "yyyy-MM-dd HH:mm:ss") + " " + $args[0] )
83.     Write-Host $logline
84.     Add-Content -Path $global:log_path -Value "$logline"
85. }
86.  
87. function main {
88.     param (
89.         [string]$msi_path,
90.         [string]$msi_url
91.     )
92.  
93.     mylog "Check-MK Installer/Updater starting"
94.     mylog "deleting $($msi_path)"
95.     # delete and redownload msi
96.     if (Remove-Item -Path $msi_path -ErrorAction SilentlyContinue) {
97.         mylog "Can not delete file $($msi_path): Aborting!"
98.         exit 1
99.     }
100.  
101.     mylog "downloading $($msi_url) to $($msi_path)"
102.     $global:progressPreference = 'silentlyContinue'
103.     for($i=1;$i -le 10;$i++) {
104.         mylog "trying download #$($i)"
105.         try {
106.             Invoke-WebRequest -Uri $msi_url -OutFile $msi_path
107.             $res = $?
108.         } catch {
109.             mylog "Error while downloading: $_"
110.             $res = $false
111.         }
112.         # mylog ('$?: ' + ">" + $res + "<")
113.         if($res -eq $True) { break }
114.         Start-Sleep -Seconds 10
115.     }
116.     if ($res -eq $false) {
117.         mylog "Giving up download. Aborting!"
118.         exit 1
119.     }
120.    
121.     Start-Sleep -Seconds 2
122.  
123.     mylog "examining msi file $($msi_file)"
124.     $msi_data       = get_msi_product_info -msi_path $msi_path
125.  
126.     mylog "checking installed version of check_mk"
127.     $installed_data = get_installed_checkmk_agent_info
128.  
129.     if ( $msi_data -and $msi_data.version ) {
130.        if ( $installed_data ) {
131.           if ( $installed_data.version ) {
132.             $installed_data_cversion = [System.Version] ($installed_data.version -replace 'p', '.')
133.             $msi_data_cversion       = [System.Version] ($msi_data.version -replace 'p', '.')
134.             if ( $installed_data_cversion -lt $msi_data_cversion ) {
135.                 mylog "Installed Version $($installed_data.version) older than MSI-Version $($msi_data.version): Uninstalling old and Installing new"
136.                 uninstall_checkmk_agent
137.                 install_msi_package -msi_path $msi_path
138.             } else {
139.                 mylog "Installed Version ($($installed_data.version)) is at least the same Version as MSI-Version ($($msi_data.version)): Doing nothing"
140.             }
141.           }
142.        } else {
143.             mylog "Check-MK not installed: Installing MSI-Package"
144.             install_msi_package -msi_path $msi_path
145.        }
146.     }
147.     mylog "Check-MK Installer/Updater finished"
148. }
149.  
150. # todo: implement check if download is really necessary (avoid bandwidth wasting)
151.  
152. # program starts here
153.  
154. $global:reg_key_sw_uninstall = "HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*"
155. $base_path         = "$($env:LOCALAPPDATA)\check_mk_updater"
156. $msi_path          = "$base_path\check_mk_agent.msi"
157. $global:log_path   = "$base_path\install.log"
158. $msi_url           = "https://download.mydomain.de/repo/check_mk_agent.msi"
159.  
160. New-Item -ItemType Directory -Path $base_path -Force | Out-Null
161. main -msi_path $msi_path -msi_url $msi_url

Quellcode

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