Function performPluginUpdate

src/services/plugins/pluginOperations.ts:896–1088

* Perform the actual plugin update: fetch source, calculate version, copy to cache, update disk. * This is the core update execution extracted from updatePluginOp.

({
  pluginId,
  pluginName,
  entry,
  marketplaceInstallLocation,
  installation,
  scope,
  projectPath,
}: {
  pluginId: string
  pluginName: string
  entry: PluginMarketplaceEntry
  marketplaceInstallLocation: string
  installation: { version?: string; installPath: string }
  scope: PluginScope
  projectPath: string | undefined
})

 * This is the core update execution extracted from updatePluginOp.
 */
async function performPluginUpdate({
  pluginId,
  pluginName,
  entry,
  marketplaceInstallLocation,
  installation,
  scope,
  projectPath,
}: {
  pluginId: string
  pluginName: string
  entry: PluginMarketplaceEntry
  marketplaceInstallLocation: string
  installation: { version?: string; installPath: string }
  scope: PluginScope
  projectPath: string | undefined
}): Promise<PluginUpdateResult> {
  const fs = getFsImplementation()
  const oldVersion = installation.version

  let sourcePath: string
  let newVersion: string
  let shouldCleanupSource = false
  let gitCommitSha: string | undefined

  // Handle remote vs local plugins
  if (typeof entry.source !== 'string') {
    // Remote plugin: download to temp directory first
    const cacheResult = await cachePlugin(entry.source, {
      manifest: { name: entry.name },
    })
    sourcePath = cacheResult.path
    shouldCleanupSource = true
    gitCommitSha = cacheResult.gitCommitSha

    // Calculate version from downloaded plugin. For git-subdir sources,
    // cachePlugin captured the commit SHA before discarding the ephemeral
    // clone (the extracted subdir has no .git, so the installPath-based
    // fallback in calculatePluginVersion can't recover it).
    newVersion = await calculatePluginVersion(
      pluginId,
      entry.source,
      cacheResult.manifest,
      cacheResult.path,
      entry.version,
      cacheResult.gitCommitSha,
    )
  } else {
    // Local plugin: use path from marketplace
    // Stat directly — handle ENOENT inline rather than pre-checking existence
    let marketplaceStats
    try {
      marketplaceStats = await fs.stat(marketplaceInstallLocation)
    } catch (e: unknown) {
      if (isENOENT(e)) {
        return {
          success: false,
          message: `Marketplace directory not found at ${marketplaceInstallLocation}`,