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#!powershell
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
# WANT_JSON
# POWERSHELL_COMMON
Set-StrictMode -Version 2
$ErrorActionPreference = "Stop"
$system_path = "System\CurrentControlSet\Control\Session Manager\Environment"
$user_path = "Environment"
# list/arraylist methods don't allow IEqualityComparer override for case/backslash/quote-insensitivity, roll our own search
Function Get-IndexOfPathElement ($list, [string]$value) {
$idx = 0
$value = $value.Trim('"').Trim('\')
ForEach($el in $list) {
If ([string]$el.Trim('"').Trim('\') -ieq $value) {
return $idx
}
$idx++
}
return -1
}
# alters list in place, returns true if at least one element was added
Function Add-Elements ($existing_elements, $elements_to_add) {
$last_idx = -1
$changed = $false
ForEach($el in $elements_to_add) {
$idx = Get-IndexOfPathElement $existing_elements $el
# add missing elements at the end
If ($idx -eq -1) {
$last_idx = $existing_elements.Add($el)
$changed = $true
}
ElseIf ($idx -lt $last_idx) {
$existing_elements.RemoveAt($idx) | Out-Null
$existing_elements.Add($el) | Out-Null
$last_idx = $existing_elements.Count - 1
$changed = $true
}
Else {
$last_idx = $idx
}
}
return $changed
}
# alters list in place, returns true if at least one element was removed
Function Remove-Elements ($existing_elements, $elements_to_remove) {
$count = $existing_elements.Count
ForEach($el in $elements_to_remove) {
$idx = Get-IndexOfPathElement $existing_elements $el
$result.removed_idx = $idx
If ($idx -gt -1) {
$existing_elements.RemoveAt($idx)
}
}
return $count -ne $existing_elements.Count
}
# PS registry provider doesn't allow access to unexpanded REG_EXPAND_SZ; fall back to .NET
Function Get-RawPathVar ($scope) {
If ($scope -eq "user") {
$env_key = [Microsoft.Win32.Registry]::CurrentUser.OpenSubKey($user_path)
}
ElseIf ($scope -eq "machine") {
$env_key = [Microsoft.Win32.Registry]::LocalMachine.OpenSubKey($system_path)
}
return $env_key.GetValue($var_name, "", [Microsoft.Win32.RegistryValueOptions]::DoNotExpandEnvironmentNames)
}
Function Set-RawPathVar($path_value, $scope) {
If ($scope -eq "user") {
$var_path = "HKCU:\" + $user_path
}
ElseIf ($scope -eq "machine") {
$var_path = "HKLM:\" + $system_path
}
Set-ItemProperty $var_path -Name $var_name -Value $path_value -Type ExpandString | Out-Null
return $path_value
}
$parsed_args = Parse-Args $args -supports_check_mode $true
$result = @{changed=$false}
$var_name = Get-AnsibleParam $parsed_args "name" -Default "PATH"
$elements = Get-AnsibleParam $parsed_args "elements" -FailIfEmpty $result
$state = Get-AnsibleParam $parsed_args "state" -Default "present" -ValidateSet "present","absent"
$scope = Get-AnsibleParam $parsed_args "scope" -Default "machine" -ValidateSet "machine","user"
$check_mode = Get-AnsibleParam $parsed_args "_ansible_check_mode" -Default $false
If ($elements -is [string]) {
$elements = @($elements)
}
If ($elements -isnot [Array]) {
Fail-Json $result "elements must be a string or list of path strings"
}
$current_value = Get-RawPathVar $scope
$result.path_value = $current_value
# TODO: test case-canonicalization on wacky unicode values (eg turkish i)
# TODO: detect and warn/fail on unparseable path? (eg, unbalanced quotes, invalid path chars)
# TODO: detect and warn/fail if system path and Powershell isn't on it?
$existing_elements = New-Object System.Collections.ArrayList
# split on semicolons, accounting for quoted values with embedded semicolons (which may or may not be wrapped in whitespace)
$pathsplit_re = [regex] '((?<q>\s*"[^"]+"\s*)|(?<q>[^;]+))(;$|$|;)'
ForEach ($m in $pathsplit_re.Matches($current_value)) {
$existing_elements.Add($m.Groups['q'].Value) | Out-Null
}
If ($state -eq "absent") {
$result.changed = Remove-Elements $existing_elements $elements
}
ElseIf ($state -eq "present") {
$result.changed = Add-Elements $existing_elements $elements
}
# calculate the new path value from the existing elements
$path_value = [String]::Join(";", $existing_elements.ToArray())
$result.path_value = $path_value
If ($result.changed -and -not $check_mode) {
Set-RawPathVar $path_value $scope | Out-Null
}
Exit-Json $result
|
