export async function activate()

in src/infoset.ts [62:155]
78 lines of code
8 McCabe index (conditional complexity)

export async function activate(ctx: vscode.ExtensionContext) {
  let sid: string | undefined
  let doc: vscode.TextDocument | undefined

  ctx.subscriptions.push(
    vscode.debug.onDidStartDebugSession((s) => {
      sid = s.id
      onDebugStartDisplay(['infoset-view', 'infoset-diff-view'])
    })
  )
  ctx.subscriptions.push(
    vscode.debug.onDidTerminateDebugSession(async (s) => {
      if (sid !== undefined) {
        let path = tmpFile(sid)
        fs.rmSync(`${path}`, { force: true })
        fs.rmSync(`${path}.prev`, { force: true })
      }
      sid = undefined
      await openInfosetFilePrompt()
    })
  )

  ctx.subscriptions.push(
    vscode.workspace.registerTextDocumentContentProvider(
      'daffodil:infoset',
      fileInfosetProvider
    )
  )

  ctx.subscriptions.push(
    vscode.commands.registerCommand('infoset.display', async () => {
      if (sid !== undefined) {
        let path = ensureFile(tmpFile(sid))
        doc = await vscode.workspace.openTextDocument(path)
        await vscode.window.showTextDocument(doc, {
          viewColumn: vscode.ViewColumn.Two,
          preserveFocus: true,
          preview: false,
        })
      }
    })
  )

  ctx.subscriptions.push(
    vscode.commands.registerCommand(
      'infoset.save',
      async (id: string, e: daf.InfosetEvent) => {
        if (sid !== undefined) {
          let dest = await vscode.window.showInputBox({
            placeHolder: 'Save infoset as:',
          })
          if (dest) {
            fs.copyFile(tmpFile(sid), dest, async () => {
              const choice = await vscode.window.showInformationMessage(
                `Wrote infoset to ${dest}`,
                'View',
                'Delete'
              )
              let uri = Uri.parse(dest!)
              switch (choice) {
                case 'View':
                  let xml = await vscode.workspace.openTextDocument(uri)
                  await vscode.window.showTextDocument(xml, {
                    preview: false,
                    viewColumn: vscode.ViewColumn.Two,
                  })
                  break
                case 'Delete':
                  fs.unlinkSync(dest!)
                  break
              }
            })
          }
        }
      }
    )
  )

  ctx.subscriptions.push(
    vscode.commands.registerCommand('infoset.diff', async () => {
      if (sid !== undefined) {
        let path = ensureFile(tmpFile(sid))
        let prev = ensureFile(`${path}.prev`)
        vscode.commands.executeCommand(
          'vscode.diff',
          Uri.parse(prev),
          Uri.parse(path),
          'Previous ↔ Current',
          { preview: false, viewColumn: vscode.ViewColumn.Two }
        )
      }
    })
  )
}