Use flatc from a pined docker container

.github/workflows/tests.yml

@@ -46,11 +46,11 @@ jobs:
     steps:
       - name: Checkout sources
         uses: actions/checkout@v4
-      - name: Install flatc
-        uses: awalsh128/cache-apt-pkgs-action@latest
-        with:
-          packages: flatbuffers-compiler
+      - name: Install unzip
+        run: sudo apt update && apt install unzip
+      - name: Get flatc
+        run: wget https://github.com/google/flatbuffers/releases/download/v23.5.26/Linux.flatc.binary.g++-10.zip && unzip Linux.flatc.binary.g++-10.zip
       - name: Generate rust code from schema
-        run: flatc --rust schema/lrs.fbs
+        run: ./flatc --rust schema/lrs.fbs
       - name: Ensure same output as commited
         run: diff src/lrs_generated.rs lrs_generated.rs

README.md

@@ -10,6 +10,6 @@ The data that defines an LRS is serialized using the [FlatBuffers format](https:
 
 The schema is described in [schema/lrs.fbs](schema/lrs.fbs). The library is written in rust and the [generated file](src/lrs_generated.rs) is commited. This means there is no need to have the `flatc` executable to build and run this project.
 
-If your contribution changes the schema, you will need to generate the file with
+If your contribution changes the schema, you will need to generate the file with flatc. The version must be the release 23.5.26. Do not use a version built from master.
 
 `flatc -o src --rust schema/lrs.fbs`