Install only i18n-report in po-diff job

.github/workflows/build.yml

@@ -180,14 +180,8 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Update Rust
-        run: rustup update
-
-      - name: Setup Rust cache
-        uses: ./.github/workflows/setup-rust-cache
-
-      - name: Install mdbook
-        uses: ./.github/workflows/install-mdbook
+      - name: Setup Bazel cache
+        uses: ./.github/workflows/setup-bazel-cache
 
       - name: Copy latest version of translations
         run: cp -r po new-po
@@ -196,4 +190,4 @@ jobs:
         run: git checkout ${{ github.event.pull_request.base.sha }}
 
       - name: Translation diff
-        run: i18n-report diff po/ new-po/ > $GITHUB_STEP_SUMMARY
+        run: bazel run @binaries//:i18n-report__i18n-report -- diff $PWD/po/ $PWD/new-po/ > $GITHUB_STEP_SUMMARY

MODULE.bazel

@@ -35,9 +35,22 @@ crate.from_cargo(
 )
 use_repo(crate, "crates")
 
-# Repositories for mdbook plugins. Add new plugins to the
-# `mdbook_plugins` repository. If this fails due to conflicts in their
-# dependencies, isolate it below with additional repositories.
+# Repositories for binary Rust artifacts. Add new `mdbook` plugins to
+# the `binaries` repository, and if this fails due to conflicts in
+# their dependencies, isolate it below with additional repositories.
+crate.spec(
+    artifact = "bin",
+    package = "i18n-report",
+    repositories = ["binaries"],
+    version = "0.2.0",
+)
+crate.from_specs(
+    name = "binaries",
+    generate_binaries = True,
+    host_tools = "@rust_host_tools_nightly",
+)
+use_repo(crate, "binaries")
+
 crate.spec(
     artifact = "bin",
     package = "mdbook-i18n-helpers",