Add working-directory input to all workflows

Apparently the global working-directory doesn't apply to the actions, so
now we have to add a working-directory input to all the workflows and
use it everywhere.

At this point it was not worth it start using the template-like setup...

.github/workflows/inbox.yml

@@ -12,9 +12,6 @@ on:
       - ".github/workflows/inbox.yml"
 permissions:
   contents: read
-defaults:
-  run:
-    working-directory: inbox
 env:
   CARGO_TERM_COLOR: always
   RUST_BACKTRACE: full
@@ -33,12 +30,15 @@ jobs:
     - uses: ./.github/workflows/test
       with:
         test-flags: ${{ matrix.release }}
+        working-directory: inbox
   Miri:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
     - uses: actions/checkout@v3
     - uses: ./.github/workflows/test_miri
+      with:
+        working-directory: inbox
   Sanitiser:
     runs-on: ubuntu-latest
     timeout-minutes: 10
@@ -51,3 +51,4 @@ jobs:
     - uses: ./.github/workflows/test_sanitizer
       with:
         sanitizer: ${{ matrix.sanitiser }}
+        working-directory: inbox

.github/workflows/test/action.yml

@@ -4,10 +4,15 @@ inputs:
   test-flags:
     description: 'Additional flags to pass using TEST_FLAGS (see Makefile).'
     required: false
+  working-directory:
+    description: 'Working directory.'
+    required: true
 runs:
   using: 'composite'
   steps:
   - uses: dtolnay/rust-toolchain@nightly
   - name: Run tests
-    run: TEST_FLAGS="${{ inputs.test-flags }}" make test
     shell: bash
+    run: |
+      cd "${{ inputs.working-directory }}"
+      TEST_FLAGS="${{ inputs.test-flags }}" make test

.github/workflows/test_miri/action.yml

@@ -4,12 +4,17 @@ inputs:
   test-flags:
     description: 'Additional flags to pass using TEST_FLAGS (see Makefile).'
     required: false
+  working-directory:
+    description: 'Working directory.'
+    required: true
 runs:
   using: 'composite'
   steps:
   - uses: dtolnay/rust-toolchain@nightly
     with:
       components: miri
   - name: Run tests
-    run: TEST_FLAGS="${{ inputs.test-flags }}" make test_miri
     shell: bash
+    run: |
+      cd "${{ inputs.working-directory }}"
+      TEST_FLAGS="${{ inputs.test-flags }}" make test_miri

.github/workflows/test_sanitizer/action.yml

@@ -7,12 +7,17 @@ inputs:
   test-flags:
     description: 'Additional flags to pass using TEST_FLAGS (see Makefile).'
     required: false
+  working-directory:
+    description: 'Working directory.'
+    required: true
 runs:
   using: 'composite'
   steps:
   - uses: dtolnay/rust-toolchain@nightly
     with:
       components: rust-src
   - name: Run tests with sanitiser
-    run: TEST_FLAGS="${{ inputs.test-flags }}" make test_sanitizer sanitizer="${{ inputs.sanitizer }}"
     shell: bash
+    run: |
+      cd "${{ inputs.working-directory }}"
+      TEST_FLAGS="${{ inputs.test-flags }}" make test_sanitizer sanitizer="${{ inputs.sanitizer }}"