FIXUP: Don't require a 'latest' image tag anymore

QA.md

@@ -109,7 +109,6 @@ version. For example:
 ```
 $ docker images dangerzone.rocks/dangerzone
 REPOSITORY                   TAG         IMAGE ID      CREATED       SIZE
-dangerzone.rocks/dangerzone  latest      <image ID>    <date>        <size>
 dangerzone.rocks/dangerzone  <tag>       <image ID>    <date>        <size>
 ```
 
@@ -121,7 +120,6 @@ and seeing the following differences:
 ```
 $ docker images dangerzone.rocks/dangerzone
 REPOSITORY                   TAG         IMAGE ID        CREATED       SIZE
-dangerzone.rocks/dangerzone  latest      <different ID>  <newer date>  <different size>
 dangerzone.rocks/dangerzone  <other tag> <different ID>  <newer date>  <different size>
 ```
 

dangerzone/container_utils.py

@@ -1,10 +1,9 @@
 import gzip
-import json
 import logging
 import platform
 import shutil
 import subprocess
-from typing import Dict, Tuple
+from typing import List, Tuple
 
 from .util import get_resource_path, get_subprocess_startupinfo
 from . import errors
@@ -72,36 +71,25 @@ def get_runtime() -> str:
     return runtime
 
 
-def list_image_tags() -> Dict[str, str]:
+def list_image_tags() -> List[str]:
     """Get the tags of all loaded Dangerzone images.
 
     This method returns a mapping of image tags to image IDs, for all Dangerzone
     images. This can be useful when we want to find which are the local image tags,
     and which image ID does the "latest" tag point to.
     """
-    images = json.loads(
-        subprocess.check_output(
+    return subprocess.check_output(
         [
             get_runtime(),
             "image",
             "list",
             "--format",
-                "json",
+            "{{ .Tag }}",
             CONTAINER_NAME,
         ],
         text=True,
         startupinfo=get_subprocess_startupinfo(),
-        )
-    )
-
-    # Grab every image name and associate it with an image ID.
-    tags = {}
-    for image in images:
-        for name in image["Names"]:
-            tag = name.split(":")[1]
-            tags[tag] = image["Id"]
-
-    return tags
+    ).strip().split()
 
 
 def delete_image_tag(tag: str) -> None:

dangerzone/isolation_provider/container.py

@@ -81,11 +81,9 @@ class Container(IsolationProvider):
         1. Get the tags of any locally available images that match Dangerzone's image
            name.
         2. Get the expected image tag from the image-id.txt file.
-           - If this tag is present in the local images, and that image is also tagged
-             as "latest", then we can return.
+           - If this tag is present in the local images, then we can return.
            - Else, prune the older container images and continue.
         3. Load the image tarball and make sure it matches the expected tag.
-        4. Tag that image as "latest", and mark the installation as finished.
         """
         old_tags = container_utils.list_image_tags()
         expected_tag = container_utils.get_expected_tag()
@@ -95,12 +93,8 @@ class Container(IsolationProvider):
             log.info(
                 f"Could not find a Dangerzone container image with tag '{expected_tag}'"
             )
-            for tag in old_tags.keys():
+            for tag in old_tags:
                 container_utils.delete_image_tag(tag)
-        elif old_tags[expected_tag] != old_tags.get("latest"):
-            log.info(f"The expected tag '{expected_tag}' is not the latest one")
-            container_utils.add_image_tag(expected_tag, "latest")
-            return True
         else:
             return True
 
@@ -117,8 +111,6 @@ class Container(IsolationProvider):
                 " container image tarball"
             )
 
-        # Mark the expected tag as "latest".
-        container_utils.add_image_tag(expected_tag, "latest")
         return True
 
     @staticmethod
@@ -179,13 +171,14 @@ class Container(IsolationProvider):
         enable_stdin = ["-i"]
         set_name = ["--name", name]
         prevent_leakage_args = ["--rm"]
+        image_name = [container_utils.CONTAINER_NAME + ":" + container_utils.get_expected_tag()]
         args = (
             ["run"]
             + security_args
             + prevent_leakage_args
             + enable_stdin
             + set_name
-            + [container_utils.CONTAINER_NAME]
+            + image_name
             + command
         )
         args = [container_runtime] + args

dev_scripts/qa.py

@@ -129,7 +129,6 @@ version. For example:
 ```
 $ docker images dangerzone.rocks/dangerzone
 REPOSITORY                   TAG         IMAGE ID      CREATED       SIZE
-dangerzone.rocks/dangerzone  latest      <image ID>    <date>        <size>
 dangerzone.rocks/dangerzone  <tag>       <image ID>    <date>        <size>
 ```
 
@@ -141,7 +140,6 @@ and seeing the following differences:
 ```
 $ docker images dangerzone.rocks/dangerzone
 REPOSITORY                   TAG         IMAGE ID        CREATED       SIZE
-dangerzone.rocks/dangerzone  latest      <different ID>  <newer date>  <different size>
 dangerzone.rocks/dangerzone  <other tag> <different ID>  <newer date>  <different size>
 ```
 

install/common/build-image.py

@@ -83,11 +83,9 @@ def main():
                 check=True,
             )
 
-        # Build the container image, and tag it with two tags; the one we calculated
-        # above, and the "latest" tag.
+        # Build the container image, and tag it with the calculated tag
         print("Building container image")
         cache_args = [] if args.use_cache else ["--no-cache"]
-        image_name_latest = IMAGE_NAME + ":latest"
         subprocess.run(
             [
                 args.runtime,
@@ -101,8 +99,6 @@ def main():
                 "-f",
                 "Dockerfile",
                 "--tag",
-                image_name_latest,
-                "--tag",
                 image_name_tagged,
             ],
             check=True,

tests/isolation_provider/test_container.py

@@ -61,11 +61,10 @@ class TestContainer(IsolationProviderTest):
                 "image",
                 "list",
                 "--format",
-                "json",
+                "{{ .Tag }}",
                 "dangerzone.rocks/dangerzone",
             ],
             occurrences=2,
-            stdout="{}",
         )
 
         # Make podman load fail
@@ -95,11 +94,10 @@ class TestContainer(IsolationProviderTest):
                 "image",
                 "list",
                 "--format",
-                "json",
+                "{{ .Tag }}",
                 "dangerzone.rocks/dangerzone",
             ],
             occurrences=2,
-            stdout="{}",
         )
 
         # Patch gzip.open and podman load so that it works