CI: Fix branch artifacts naming and submodules in the linter (#605)

* Fix branch artifacts naming
* Port submodules fix from build.yml
* Github: port decontamination to python lint action
* Github: skip decontamination on non existing repos
* Github: skip submodules python lint

Co-authored-by: あく <alleteam@gmail.com>

.github/workflows/build.yml

@@ -14,8 +14,11 @@ jobs:
 
       - name: 'Decontaminate previous build leftovers'
         run: |
+          if [ -d .git ]
+          then
             git submodule status \
               || git checkout `git rev-list --max-parents=0 HEAD | tail -n 1`
+          fi
 
       - name: 'Checkout code'
         uses: actions/checkout@v2
@@ -44,7 +47,7 @@ jobs:
 
       - name: 'Generate branch suffix'
         if: startsWith(github.ref, 'refs/tags/') != true
-        run: echo "SUFFIX=$(date +'%Y-%m-%d')-$(git rev-parse --short HEAD)" >> $GITHUB_ENV
+        run: echo "SUFFIX=$(git rev-parse --abbrev-ref HEAD)-$(date +'%d%m%Y')-$(git rev-parse --short HEAD)" >> $GITHUB_ENV
 
       - name: 'Build bootloader in docker'
         uses: ./.github/actions/docker

.github/workflows/lint_c.yml

@@ -12,16 +12,19 @@ jobs:
       - name: 'Cleanup workspace'
         uses: AutoModality/action-clean@v1
 
+      - name: 'Decontaminate previous build leftovers'
+        run: |
+          if [ -d .git ]
+          then
+            git submodule status \
+              || git checkout `git rev-list --max-parents=0 HEAD | tail -n 1`
+          fi
+
       - name: 'Checkout code'
         uses: actions/checkout@v2
         with:
           fetch-depth: 0
-
-      - name: 'Checkout submodules: update'
-        run: git submodule update --init --recursive
-
-      - name: 'Checkout submodules: sync'
-        run: git submodule sync
+          submodules: true
 
       - name: 'Docker cache'
         uses: satackey/action-docker-layer-caching@v0.0.11

.github/workflows/lint_python.yml

@@ -10,6 +10,24 @@ jobs:
   lint_python:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
-      - uses: psf/black@20.8b1
+      - name: 'Cleanup workspace'
+        uses: AutoModality/action-clean@v1
+
+      - name: 'Decontaminate previous build leftovers'
+        run: |
+          if [ -d .git ]
+          then
+            git submodule status \
+              || git checkout `git rev-list --max-parents=0 HEAD | tail -n 1`
+          fi
+
+      - name: 'Checkout code'
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: 'Setup python'
+        uses: actions/setup-python@v2
+
+      - name: 'Check python code with black'
+        uses: psf/black@20.8b1