Merge pull request #23 from swissbuechi/add-ghcr.io-support

Added support for ghcr.io public images

Author: sbe-arg

README.md

@@ -55,6 +55,7 @@ jobs:
   - `docker.io/somecompany/theimage:x.x.x` (ie, docker.io/grafana/grafana:10.0.1)
   - `mcr.microsoft.com/part/theimage:x.x.x` (ie, mcr.microsoft.com/azure-cli:2.50.0)
   - `gcr.io/project/image:x.x.x` (ie, gcr.io/cadvisor/cadvisor:v0.47.1)
+  - `ghcr.io/username/image:x.x.x` (ie, ghcr.io/swissbuechi/one-time-secret:1.0.10)
 
 ## what for:
 
@@ -65,6 +66,7 @@ jobs:
 - dockerhub
 - microsoft mcr
 - google gcr
+- github packages ghcr (public images)
 - other? open an issue or open pr
 
 ## what does it look like

VERSION

@@ -1 +1 @@
-v0.1.1
+v0.2.0

bin/pincher.sh

@@ -126,6 +126,27 @@ do
     [ -n "$latest_version_in_registry" ] && versions_magic
 done
 
+# github ghcr
+versions_ghcr=$(yq '.services[].image' ./*compose*.y* | grep ghcr.io | sort | uniq)
+for version in $versions_ghcr
+do
+    latest_version_in_registry=""
+
+    [[ $version =~ ghcr.io\/(.*)\:(.*) ]]
+    image=${BASH_REMATCH[1]}
+    v_rematched=${BASH_REMATCH[2]}
+    echo "image: $image, v: $v_rematched"
+    
+    # TODO: Private repos require authentication with a PAT or github token
+    # ghcr_token=$(echo $GITHUB_TOKEN | base64)
+    
+    ghcr_token=$(curl -s https://ghcr.io/token\?scope\="repository:$image:pull" | jq -r .token)
+    latest_version_in_registry="$(curl -H "Authorization: Bearer ${ghcr_token}" -s https://ghcr.io/v2/$image/tags/list | jq -r '.tags[]' | sort -V -t. -k1,1 -k2,2 -k3,3 | grep -oP '^v?[0-9]+\.[0-9]+\.[0-9]+$' | tail -n 1)"
+
+    # the magic
+    [ -n "$latest_version_in_registry" ] && versions_magic
+done
+
 # considerations "how to edit/contribute"
 # add each new registry in a separated block loop as per the existing ones
 # authentication happens via env_vars in the action block if required