refactor(install): share target selection helpers

scripts/lib/install-targets.ps1

@@ -0,0 +1,59 @@
+function Read-InstallPlatform {
+    param([string]$Platform)
+    if ($Platform) { return $Platform }
+    Write-Host 'Select target platform:'
+    Write-Host '1) Windows'
+    Write-Host '2) Linux'
+    do { $selection = Read-Host 'Selection [1-2]' } while ($selection -notin @('1','2'))
+    return @{'1'='Windows'; '2'='Linux'}[$selection]
+}
+
+function Read-InstallClient {
+    param([string]$Client)
+    if ($Client) { return $Client }
+    Write-Host 'Select installation target:'
+    Write-Host '1) Codex'
+    Write-Host '2) Claude'
+    Write-Host '3) Both'
+    do { $selection = Read-Host 'Selection [1-3]' } while ($selection -notin @('1','2','3'))
+    return @{'1'='Codex'; '2'='Claude'; '3'='Both'}[$selection]
+}
+
+function Get-InstallDestinations {
+    param(
+        [Parameter(Mandatory=$true)][string]$HomePath,
+        [ValidateSet('Codex','Claude','Both')][Parameter(Mandatory=$true)][string]$Client
+    )
+    $destinations = @()
+    if ($Client -in @('Codex','Both')) { $destinations += Join-Path $HomePath '.codex' }
+    if ($Client -in @('Claude','Both')) { $destinations += Join-Path $HomePath '.claude' }
+    return $destinations
+}
+
+function Get-InstallTargets {
+    param(
+        [Parameter(Mandatory=$true)][string]$Generated,
+        [Parameter(Mandatory=$true)][string]$HomePath,
+        [Parameter(Mandatory=$true)][string]$Platform,
+        [ValidateSet('Codex','Claude','Both')][Parameter(Mandatory=$true)][string]$Client
+    )
+    $targets = @()
+    if ($Client -in @('Codex','Both')) {
+        $targets += @{ Source=(Join-Path $Generated "codex-$Platform"); Destination=(Join-Path $HomePath '.codex') }
+        $targets += @{ Source=(Join-Path $Generated "codex-$Platform/skills"); Destination=(Join-Path $HomePath '.agents/skills') }
+    }
+    if ($Client -in @('Claude','Both')) {
+        $targets += @{ Source=(Join-Path $Generated "claude-$Platform"); Destination=(Join-Path $HomePath '.claude') }
+    }
+    return $targets
+}
+
+function Test-AnyManifestPresent {
+    param([Parameter(Mandatory=$true)][string[]]$Destinations)
+    return [bool](@($Destinations | Where-Object { Test-Path (Get-ManagedManifestPath $_) }).Count)
+}
+
+function Test-AllManifestsPresent {
+    param([Parameter(Mandatory=$true)][string[]]$Destinations)
+    return [bool](@($Destinations | Where-Object { -not (Test-Path (Get-ManagedManifestPath $_)) }).Count -eq 0)
+}

scripts/lib/install-targets.sh

@@ -0,0 +1,73 @@
+#!/usr/bin/env bash
+
+read_install_platform() {
+  local platform=$1
+  if [ -n "$platform" ]; then
+    case "$platform" in
+      windows|Windows) printf 'windows\n'; return 0 ;;
+      linux|Linux) printf 'linux\n'; return 0 ;;
+      *) printf 'Unknown --platform value: %s (expected windows or linux)\n' "$platform" >&2; return 1 ;;
+    esac
+  fi
+  printf 'Select target platform:\n1) Windows\n2) Linux\n' >&2
+  local selection
+  while :; do
+    read -r -p 'Selection [1-2] ' selection
+    case "$selection" in 1) printf 'windows\n'; return 0 ;; 2) printf 'linux\n'; return 0 ;; esac
+  done
+}
+
+read_install_client() {
+  local client=$1
+  if [ -n "$client" ]; then
+    case "$client" in
+      codex|Codex) printf 'codex\n'; return 0 ;;
+      claude|Claude) printf 'claude\n'; return 0 ;;
+      both|Both) printf 'both\n'; return 0 ;;
+      *) printf 'Unknown --client value: %s (expected codex, claude, or both)\n' "$client" >&2; return 1 ;;
+    esac
+  fi
+  printf 'Select installation target:\n1) Codex\n2) Claude\n3) Both\n' >&2
+  local selection
+  while :; do
+    read -r -p 'Selection [1-3] ' selection
+    case "$selection" in 1) printf 'codex\n'; return 0 ;; 2) printf 'claude\n'; return 0 ;; 3) printf 'both\n'; return 0 ;; esac
+  done
+}
+
+# get_install_destinations <home> <client> -- prints one destination per line
+get_install_destinations() {
+  local home_path=$1 client=$2
+  case "$client" in codex|both) printf '%s/.codex\n' "$home_path" ;; esac
+  case "$client" in claude|both) printf '%s/.claude\n' "$home_path" ;; esac
+}
+
+# get_install_targets <generated> <home> <platform> <client> -- prints "source|dest" per line
+get_install_targets() {
+  local generated=$1 home_path=$2 platform=$3 client=$4
+  case "$client" in
+    codex|both)
+      printf '%s/codex-%s|%s/.codex\n' "$generated" "$platform" "$home_path"
+      printf '%s/codex-%s/skills|%s/.agents/skills\n' "$generated" "$platform" "$home_path"
+      ;;
+  esac
+  case "$client" in claude|both) printf '%s/claude-%s|%s/.claude\n' "$generated" "$platform" "$home_path" ;; esac
+}
+
+# any_manifest_present <destination>... -- true (0) if at least one has a manifest
+any_manifest_present() {
+  local destination
+  for destination in "$@"; do
+    [ -f "$(manifest_path "$destination")" ] && return 0
+  done
+  return 1
+}
+
+# all_manifests_present <destination>... -- true (0) only if every destination has a manifest
+all_manifests_present() {
+  local destination
+  for destination in "$@"; do
+    [ -f "$(manifest_path "$destination")" ] || return 1
+  done
+  return 0
+}