Don't checkout submodules by default

This makes sure that cargo does not clone and checkout all the
submodules if pointing to this repository as a git dependency.

To checkout the submodules `git submodule update --checkout` can be
used.

Author: sdroege

.github/workflows/CI.yml

@@ -103,16 +103,18 @@ jobs:
 
   regen_check:
     name: regen checker
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
         with:
           submodules: "recursive"
+          set-safe-directory: true
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: stable
           override: true
+      - run: git submodule update --checkout
       - run: python3 ./generator.py --yes ./
       - run: git diff --exit-code
 
@@ -123,11 +125,13 @@ jobs:
       - uses: actions/checkout@v2
         with:
           submodules: recursive
+          set-safe-directory: true
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: stable
           override: true
+      - run: git submodule update --checkout
       - run: cargo install rustdoc-stripper
       - run: python3 generator.py --embed-docs
       - run: python3 generator.py --strip-docs

.github/workflows/docs.yml

@@ -42,14 +42,15 @@ jobs:
       - uses: actions/checkout@v2
         with:
           submodules: "recursive"
+          set-safe-directory: true
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: nightly
           override: true
           components: rustfmt
-      - working-directory: gir
-        run: cargo build --release
+      - run: git config --global --add safe.directory /__w/gtk4-rs/gtk4-rs
+      - run: git submodule update --checkout
       - run: cargo install rustdoc-stripper
       - run: git clone https://gitlab.gnome.org/World/Rust/gir-rustdoc/ # checkout action doesn't support random urls
       - run: python3 ./generator.py --embed-docs --yes ./

.gitmodules

@@ -1,6 +1,8 @@
 [submodule "gir"]
 	path = gir
-	url = https://github.com/gtk-rs/gir.git
+	url = https://github.com/gtk-rs/gir
+	update = none
 [submodule "gir-files"]
 	path = gir-files
-	url = https://github.com/gtk-rs/gir-files.git
+	url = https://github.com/gtk-rs/gir-files
+	update = none