Add auto update script

auto_update/auto_update.sh

@@ -0,0 +1,82 @@
+#!/bin/bash
+
+set -eu
+
+readonly app_name=seafile
+
+get_from_manifest() {
+    result=$(python3 <<EOL
+import toml
+import json
+with open("../manifest.toml", "r") as f:
+    file_content = f.read()
+loaded_toml = toml.loads(file_content)
+json_str = json.dumps(loaded_toml)
+print(json_str)
+EOL
+    )
+    echo "$result" | jq -r "$1"
+}
+
+check_app_version() {
+    local docker_request_res="$(curl -s 'https://hub.docker.com/v2/repositories/seafileltd/seafile-mc/tags' -H 'Content-Type: application/json' |
+        jq -r '.results[]')"
+    local docker_digest_latest="$(echo "$docker_request_res" |
+        jq -r 'select(.name == "latest") | .digest')"
+    local app_remote_version=$(echo "$docker_request_res" |
+        jq -r 'select(.digest == "'"$docker_digest_latest"'" and .name != "latest") | .name')
+
+    ## Check if new build is needed
+    if [[ "$app_version" != "$app_remote_version" ]]
+    then
+        app_version="$app_remote_version"
+        return 0
+    else
+        return 1
+    fi
+}
+
+upgrade_app() {
+    (
+        set -eu
+
+        local docker_request_res="$(curl -s 'https://hub.docker.com/v2/repositories/seafileltd/seafile-mc/tags' -H 'Content-Type: application/json' |
+            jq -r '.results[]')"
+        local docker_checksum_amd64="$(echo "$docker_request_res" |
+            jq -r 'select(.name == "'"$app_version"'") | .images[] | select(.architecture == "amd64") | .digest' |
+            cut -d: -f2)"
+        local docker_checksum_arm64="$(echo "$docker_request_res" |
+            jq -r 'select(.name == "'"$app_version"'") | .images[] | select(.architecture == "arm64") | .digest' |
+            cut -d: -f1)"
+
+        prev_sha256sum_amd64=$(get_from_manifest ".resources.sources.main.amd64.sha256")
+        prev_sha256sum_arm64=$(get_from_manifest ".resources.sources.main.arm64.sha256")
+
+        # Update manifest
+        sed -r -i 's|version = "[[:alnum:].]{4,8}~ynh[[:alnum:].]{1,2}"|version = "'"${app_version}"'~ynh1"|' ../manifest.toml
+        sed -r -i "s|$prev_sha256sum_amd64|$docker_checksum_amd64|" ../manifest.toml
+        sed -r -i "s|$prev_sha256sum_arm64|$docker_checksum_arm64|" ../manifest.toml
+
+        git commit -a -m "Upgrade $app_name to $app_version"
+        git push gitea auto_update:auto_update
+    ) 2>&1 | tee "${app_name}_build_temp.log"
+    return "${PIPESTATUS[0]}"
+}
+
+app_version=$(get_from_manifest ".version" |  cut -d'~' -f1)
+
+if check_app_version
+then
+    set +eu
+    upgrade_app
+    res=$?
+    set -eu
+    if [ $res -eq 0 ]; then
+        result="Success"
+    else
+        result="Failed"
+    fi
+    msg="Build: $app_name version $app_version\n"
+    msg+="$(cat ${app_name}_build_temp.log)"
+    echo -e "$msg" | mail.mailutils -a "Content-Type: text/plain; charset=UTF-8" -s "Autoupgrade $app_name : $result" "$notify_email"
+fi