Merge pull request 'fix: replace python2 with python3+ln symlink for Ubuntu 26.04' (#8) from fix/remove-python2-dependency into master

- Ubuntu 26.04 (glibc ≥ 2.35) required by latest Calibre installer
- python2 removed in Ubuntu ≥ 24.04, use python3 + ln symlink
- libfontconfig → libfontconfig1 (transitional package removed)

.gitlab-ci.yml

@@ -1,4 +1,4 @@
-image: "docker:latest"
+image: docker:latest
 
 services:
   - "docker:dind"

Dockerfile

@@ -1,17 +1,13 @@
-FROM "ubuntu:18.04"
+FROM ubuntu:26.04
 # Il n'est pas possible d'utiliser alpine,
 # cela pose problème avec le script de post-install qui dépends vraiment de glibc.
 # Il faudrait alors partir sur une full recompilation de calibre (sans certitudes sur le bon fonctionnement).
 LABEL maintainer="Julien Cabillot <dockerimages@cabillot.eu>"
 
 RUN export DEBIAN_FRONTEND="noninteractive" && \
-    export BUILD_PACKAGES="wget xz-utils" && \
-    export RUNTIME_PACKAGES="python xvfb libfontconfig libxrender1 libxcomposite1" && \
     apt-get -qq update && \
-    apt-get -qq --yes install ${BUILD_PACKAGES} ${RUNTIME_PACKAGES} && \
-    wget -nv -O- https://download.calibre-ebook.com/linux-installer.py | python -c "import sys; main=lambda:sys.stderr.write('Download failed\n'); exec(sys.stdin.read()); main()" && \
-    apt-get -qq --yes remove --purge ${BUILD_PACKAGES} && \
-    apt-get -qq --yes autoremove --purge && \
+    apt-get -qq --yes install python3 xvfb libfontconfig1 libxrender1 libxcomposite1 libegl1 libopengl0 libxcb-cursor0 calibre && \
+    ln -sf /usr/bin/python3 /usr/bin/python && \
     apt-get -qq --yes clean all && \
     rm -rf "/usr/share/doc/"* \
            "/usr/src/"* \

renovate.json

@@ -0,0 +1,18 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "gitlabci": {
+    "enabled": true
+  },
+  "regexManagers": [
+    {
+      "description": "Track Tini version from ENV-based ADD download URL",
+      "fileMatch": ["^Dockerfile$"],
+      "matchStrings": [
+        "TINI_VERSION\\s+\"(?<currentValue>[^\"]+)\""
+      ],
+      "depNameTemplate": "krallin/tini",
+      "datasourceTemplate": "github-releases",
+      "versioningTemplate": "semver"
+    }
+  ]
+}