Add common caches support

Author: mbaluda

.github/actions/install-codeql-packs/action.yml

@@ -7,6 +7,11 @@ inputs:
       The path to the CodeQL CLI directory.
     required: false
 
+  common_caches:
+    description: |
+      The path to the CodeQL common caches directory.
+    required: false
+
   mode:
     description: |
       The `--mode` option to `codeql pack install`.
@@ -22,4 +27,6 @@ runs:
         CODEQL_CLI: ${{ inputs.cli_path }}
       run: |
         PATH=$PATH:$CODEQL_CLI
-        python scripts/install-packs.py --mode ${{ inputs.mode }}
+        python scripts/install-packs.py \
+          --mode ${{ inputs.mode }} \
+          --common-caches "${{ inputs.common_caches }}"

.github/workflows/codeql_unit_tests.yml

@@ -85,6 +85,7 @@ jobs:
         uses: ./.github/actions/install-codeql-packs
         with:
           cli_path: ${{ github.workspace }}/codeql_home/codeql
+          common_caches: ${{ github.workspace }}/codeql_cache
 
       - name: Pre-Compile Queries
         id: pre-compile-queries

scripts/install-packs.py

@@ -6,6 +6,7 @@
 parser = argparse.ArgumentParser(description="Install CodeQL library pack dependencies.")
 parser.add_argument('--mode', required=False, choices=['use-lock', 'update', 'verify', 'no-lock'], default="use-lock", help="Installation mode, identical to the `--mode` argument to `codeql pack install`")
 parser.add_argument('--codeql', required=False, default='codeql', help="Path to the `codeql` executable.")
+parser.add_argument('--common-caches', required=False, help="Path to the CodeQL common caches directory.")
 args = parser.parse_args()
 
 # Find the root of the repo
@@ -19,5 +20,7 @@
     pack_path = os.path.join(root, pack)
     # Run `codeql pack install` to install dependencies.
     command = [args.codeql, 'pack', 'install', '--allow-prerelease', '--mode', args.mode, pack_path]
+    if args.common_caches:
+        command.insert(3, f'--common-caches={args.common_caches}')
     print(f'Running `{" ".join(command)}`')
     subprocess.check_call(command)