make.sh: Clone submodules automatically

.github/workflows/ci.yml

@@ -9,8 +9,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-        with:
-          submodules: recursive
       - uses: actions/setup-go@v3
         with:
           go-version-file: ./go.mod

.github/workflows/daily.yml

@@ -14,8 +14,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-        with:
-          submodules: recursive
       - uses: actions/setup-go@v3
         with:
           go-version-file: ./go.mod

make.sh

@@ -1,5 +1,8 @@
 #!/bin/sh
 set -eu
+if [ ! -d "$(dirname "$0")/ci/sub/.git" ]; then
+  git submodule update --init
+fi
 . "$(dirname "$0")/ci/sub/lib.sh"
 PATH="$(cd -- "$(dirname "$0")" && pwd)/ci/sub/bin:$PATH"
 cd "$(dirname "$0")"