Display the {podman,docker} pull progress when installing a new image

The progressbars we see when using this same commands on the
command line doesn't seem to be passed to the python process here,
unfortunately.

dangerzone/container_utils.py

@@ -4,14 +4,16 @@ import platform
 import shutil
 import subprocess
 from pathlib import Path
-from typing import List, Optional, Tuple
+from typing import IO, Callable, List, Optional, Tuple
 
 from . import errors
 from .settings import Settings
 from .util import get_resource_path, get_subprocess_startupinfo
 
 OLD_CONTAINER_NAME = "dangerzone.rocks/dangerzone"
-CONTAINER_NAME = "ghcr.io/freedomofpress/dangerzone/dangerzone"
+CONTAINER_NAME = (
+    "ghcr.io/almet/dangerzone/dangerzone"
+)  # FIXME: Change this to the correct container name
 
 log = logging.getLogger(__name__)
 
@@ -228,16 +230,27 @@ def get_image_id_by_digest(digest: str) -> str:
     return process.stdout.decode().strip().split("\n")[0]
 
 
-def container_pull(image: str, manifest_digest: str):
+def container_pull(image: str, manifest_digest: str, callback: Callable):
     """Pull a container image from a registry."""
     runtime = Runtime()
     cmd = [str(runtime.path), "pull", f"{image}@sha256:{manifest_digest}"]
-    try:
-        subprocess_run(cmd, check=True)
-    except subprocess.CalledProcessError as e:
+    process = subprocess.Popen(
+        cmd,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.STDOUT,
+        text=True,
+        bufsize=1,
+        universal_newlines=True,
+    )
+
+    for line in process.stdout:  # type: ignore
+        callback(line)
+
+    process.wait()
+    if process.returncode != 0:
         raise errors.ContainerPullException(
-            f"Could not pull the container image: {e}"
-        ) from e
+            f"Could not pull the container image: {process.returncode}"
+        )
 
 
 def get_local_image_digest(image: str) -> str:

dangerzone/gui/main_window.py

@@ -1,3 +1,4 @@
+import io
 import logging
 import os
 import platform
@@ -5,22 +6,24 @@ import tempfile
 import typing
 from multiprocessing.pool import ThreadPool
 from pathlib import Path
-from typing import List, Optional
+from typing import Callable, List, Optional
 
 # FIXME: See https://github.com/freedomofpress/dangerzone/issues/320 for more details.
 if typing.TYPE_CHECKING:
     from PySide2 import QtCore, QtGui, QtSvg, QtWidgets
     from PySide2.QtCore import Qt
+    from PySide2.QtGui import QTextCursor
     from PySide2.QtWidgets import QAction, QTextEdit
 else:
     try:
         from PySide6 import QtCore, QtGui, QtSvg, QtWidgets
         from PySide6.QtCore import Qt
-        from PySide6.QtGui import QAction
+        from PySide6.QtGui import QAction, QTextCursor
         from PySide6.QtWidgets import QTextEdit
     except ImportError:
         from PySide2 import QtCore, QtGui, QtSvg, QtWidgets
         from PySide2.QtCore import Qt
+        from PySide2.QtGui import QTextCursor
         from PySide2.QtWidgets import QAction, QTextEdit
 
 from .. import errors
@@ -436,15 +439,21 @@ class MainWindow(QtWidgets.QMainWindow):
 
 class InstallContainerThread(QtCore.QThread):
     finished = QtCore.Signal(str)
+    process_stdout = QtCore.Signal(str)
 
-    def __init__(self, dangerzone: DangerzoneGui) -> None:
+    def __init__(
+        self, dangerzone: DangerzoneGui, callback: Optional[Callable] = None
+    ) -> None:
         super(InstallContainerThread, self).__init__()
         self.dangerzone = dangerzone
 
     def run(self) -> None:
         error = None
         try:
-            installed = self.dangerzone.isolation_provider.install()
+            should_upgrade = self.dangerzone.settings.get("updater_check_all")
+            installed = self.dangerzone.isolation_provider.install(
+                should_upgrade=bool(should_upgrade), callback=self.process_stdout.emit
+            )
         except Exception as e:
             log.error("Container installation problem")
             error = format_exception(e)
@@ -479,11 +488,20 @@ class TracebackWidget(QTextEdit):
         # Enable copying
         self.setTextInteractionFlags(Qt.TextSelectableByMouse)
 
+        self.current_output = ""
+
     def set_content(self, error: Optional[str] = None) -> None:
         if error:
             self.setPlainText(error)
             self.setVisible(True)
 
+    def process_output(self, line):
+        self.current_output += line
+        self.setText(self.current_output)
+        cursor = self.textCursor()
+        cursor.movePosition(QTextCursor.MoveOperation.End)
+        self.setTextCursor(cursor)
+
 
 class WaitingWidgetContainer(WaitingWidget):
     # These are the possible states that the WaitingWidget can show.
@@ -623,8 +641,14 @@ class WaitingWidgetContainer(WaitingWidget):
                 "Installing the Dangerzone container image.<br><br>"
                 "This might take a few minutes..."
             )
+            self.traceback.setVisible(True)
+
             self.install_container_t = InstallContainerThread(self.dangerzone)
             self.install_container_t.finished.connect(self.installation_finished)
+
+            self.install_container_t.process_stdout.connect(
+                self.traceback.process_output
+            )
             self.install_container_t.start()
 
 

dangerzone/isolation_provider/base.py

@@ -95,7 +95,7 @@ class IsolationProvider(ABC):
         return self.debug or getattr(sys, "dangerzone_dev", False)
 
     @abstractmethod
-    def install(self) -> bool:
+    def install(self, should_upgrade: bool, callback: Callable) -> bool:
         pass
 
     def convert(

dangerzone/isolation_provider/container.py

@@ -3,7 +3,7 @@ import os
 import platform
 import shlex
 import subprocess
-from typing import List, Tuple
+from typing import Callable, List, Tuple
 
 from .. import container_utils, errors, updater
 from ..container_utils import Runtime
@@ -94,27 +94,38 @@ class Container(IsolationProvider):
         return security_args
 
     @staticmethod
-    def install() -> bool:
+    def install(
+        should_upgrade: bool, callback: Callable, last_try: bool = False
+    ) -> bool:
         """Check if an update is available and install it if necessary."""
-        # XXX Do this only if users have opted in to auto-updates
-        if False:  # Comment this for now, just as an exemple of this can be implemented
-            # # Load the image tarball into the container runtime.
+        if not should_upgrade:
+            log.debug("Skipping container upgrade check as requested by the settings")
+        else:
             update_available, image_digest = updater.is_update_available(
-                container_utils.CONTAINER_NAME
+                container_utils.CONTAINER_NAME,
+                updater.DEFAULT_PUBKEY_LOCATION,
             )
             if update_available and image_digest:
+                log.debug("Upgrading container image to %s", image_digest)
                 updater.upgrade_container_image(
                     container_utils.CONTAINER_NAME,
                     image_digest,
                     updater.DEFAULT_PUBKEY_LOCATION,
+                    callback=callback,
                 )
-            for tag in old_tags:
-                tag = container_utils.CONTAINER_NAME + ":" + tag
-                container_utils.delete_image_tag(tag)
-
-        updater.verify_local_image(
-            container_utils.CONTAINER_NAME, updater.DEFAULT_PUBKEY_LOCATION
-        )
+            else:
+                log.debug("No update available for the container")
+        try:
+            updater.verify_local_image(
+                container_utils.CONTAINER_NAME, updater.DEFAULT_PUBKEY_LOCATION
+            )
+        except errors.ImageNotPresentException:
+            if last_try:
+                raise
+            log.debug("Container image not found, trying to install it.")
+            return Container.install(
+                should_upgrade=should_upgrade, callback=callback, last_try=True
+            )
 
         return True
 

dangerzone/updater/signatures.py

@@ -9,7 +9,7 @@ from hashlib import sha256
 from io import BytesIO
 from pathlib import Path
 from tempfile import NamedTemporaryFile, TemporaryDirectory
-from typing import Dict, List, Optional, Tuple
+from typing import Callable, Dict, List, Optional, Tuple
 
 from .. import container_utils as runtime
 from .. import errors as dzerrors
@@ -370,7 +370,9 @@ def load_and_verify_signatures(
     return signatures
 
 
-def store_signatures(signatures: list[Dict], image_digest: str, pubkey: str) -> None:
+def store_signatures(
+    signatures: list[Dict], image_digest: str, pubkey: str, update_logindex: bool = True
+) -> None:
     """
     Store signatures locally in the SIGNATURE_PATH folder, like this:
 
@@ -415,7 +417,8 @@ def store_signatures(signatures: list[Dict], image_digest: str, pubkey: str) ->
         )
         json.dump(signatures, f)
 
-    write_log_index(get_log_index_from_signatures(signatures))
+    if update_logindex:
+        write_log_index(get_log_index_from_signatures(signatures))
 
 
 def verify_local_image(image: str, pubkey: str) -> bool:
@@ -479,14 +482,16 @@ def prepare_airgapped_archive(image_name: str, destination: str) -> None:
             archive.add(tmpdir, arcname=".")
 
 
-def upgrade_container_image(image: str, manifest_digest: str, pubkey: str) -> str:
+def upgrade_container_image(
+    image: str, manifest_digest: str, pubkey: str, callback: Callable
+) -> str:
     """Verify and upgrade the image to the latest, if signed."""
     update_available, remote_digest = registry.is_new_remote_image_available(image)
     if not update_available:
         raise errors.ImageAlreadyUpToDate("The image is already up to date")
 
     signatures = check_signatures_and_logindex(image, remote_digest, pubkey)
-    runtime.container_pull(image, manifest_digest)
+    runtime.container_pull(image, manifest_digest, callback=callback)
 
     # Store the signatures just now to avoid storing them unverified
     store_signatures(signatures, manifest_digest, pubkey)