Added Github Action that updates copyright year.

.github/workflows/copyright_year_updater.yml

@@ -0,0 +1,16 @@
+name: Copyright year updater.
+
+on:
+  repository_dispatch:
+    types: ["Restart copyright_year_updater workflow."]
+  schedule:
+    # At 03:00 on January 1.
+    - cron: "0 3 1 1 *"
+
+jobs:
+  Copyright-year:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: desktop-app/action_code_updater@master
+        with:
+          type: "license-year"

.github/workflows/user_agent_updater.yml

@@ -5,152 +5,14 @@ on:
     types: ["Restart user_agent_updater workflow."]
   schedule:
     # At 00:00 on day-of-month 1.
-    - cron: '0 0 1 * *'
+    - cron: "0 0 1 * *"
   pull_request_target:
     types: [closed]
 
 jobs:
   User-agent:
     runs-on: ubuntu-latest
-
-    env:
-      codeFile: "Telegram/SourceFiles/mtproto/details/mtproto_domain_resolver.cpp"
-      headBranchPrefix: "chrome_"
-      baseBranch: "dev"
-      isPull: "0"
-
     steps:
-      - name: Set env.
-        if: startsWith(github.event_name, 'pull_request')
-        run: |
-          echo "isPull=1" >> $GITHUB_ENV
-
-      - name: Clone.
-        uses: actions/checkout@v2
-
-      - name: Set up git.
-        run: |
-          token=${{ secrets.TOKEN_FOR_MASTER_UPDATER }}
-          if [ -z "${token}" ]; then
-              echo "Token is unset. Nothing to do."
-              exit 1
-          fi
-
-          url=https://x-access-token:$token@github.com/$GITHUB_REPOSITORY
-
-          git config --global user.email "action@github.com"
-          git config --global user.name "GitHub Action"
-
-          git remote set-url origin $url
-
-      - name: Delete branch.
-        env:
-          ref: ${{ github.event.pull_request.head.ref }}
-        if: |
-          env.isPull == '1'
-            && github.event.action == 'closed'
-            && startsWith(env.ref, env.headBranchPrefix)
-        run: |
-          git push origin --delete $ref
-
-      - name: Write a new version of Google Chrome to the user-agent for DNS.
-        if: env.isPull == '0'
-        shell: python
-        run: |
-          import subprocess, os, re;
-
-          regExpVersion = "[0-9]+.[0-9]+.[0-9]+.[0-9]+";
-          chrome = "Chrome/";
-
-          def newVersion():
-            output = subprocess.check_output(["google-chrome", "--version"]);
-            version = re.search(regExpVersion, output);
-            if not version:
-              print("Can't find a Chrome version.");
-              exit();
-            return version.group(0);
-
-          newChromeVersion = newVersion();
-          print(newChromeVersion);
-
-          def setEnv(value):
-            open(os.environ['GITHUB_ENV'], "a").write(value);
-
-          def writeUserAgent():
-            p = os.environ['codeFile'];
-            w = open(p, "r");
-            content = w.read();
-            w.close();
-
-            regExpChrome = chrome + regExpVersion;
-
-            version = re.search(regExpChrome, content);
-            if not version:
-              print("Can't find an user-agent in the code.");
-              exit();
-            content = re.sub(regExpChrome, chrome + newChromeVersion, content);
-
-            w = open(p, "w");
-            w.write(content);
-
-            setEnv("ChromeVersion=" + newChromeVersion);
-
-          writeUserAgent();
-
-      - name: Push to a new branch.
-        if: env.isPull == '0' && env.ChromeVersion != ''
-        run: |
-          git diff > git_diff.txt
-          if [[ ! -s git_diff.txt ]]; then
-            echo "Nothing to commit."
-            exit 0
-          fi
-
-          git checkout -b $headBranchPrefix$ChromeVersion
-          git add $codeFile
-          git commit -m "Update User-Agent for DNS to Chrome $ChromeVersion."
-
-          git push origin $headBranchPrefix$ChromeVersion
-          echo "Done!"
-
-      - name: Close previous pull requests.
-        if: env.isPull == '0' && env.ChromeVersion != ''
-        uses: actions/github-script@0.4.0
+      - uses: desktop-app/action_code_updater@master
         with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          script: |
-            const common = {
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-            };
-
-            github.pulls.list(common).then(response => {
-              response.data.forEach((item, _) => {
-                if (item.head.ref.startsWith(process.env.headBranchPrefix)) {
-                  console.log(`Close ${item.title} #${item.number}.`);
-                  github.pulls.update({
-                    pull_number: item.number,
-                    state: "closed",
-                    ...common
-                  });
-                }
-              });
-            });
-
-      - name: Create a new pull request.
-        if: env.isPull == '0' && env.ChromeVersion != ''
-        uses: actions/github-script@0.4.0
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          script: |
-            const version = process.env.ChromeVersion;
-            const title = `Update User-Agent for DNS to Chrome ${version}.`;
-
-            github.pulls.create({
-              title: title,
-              body: "",
-              head: `${process.env.headBranchPrefix}${version}`,
-              base: process.env.baseBranch,
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-            });
+          type: "user-agent"