tools: Add cargo-doc script

BUG=none
TEST=Run GitHub Action on my personal GitHub repository

Change-Id: I62de2693f3a654e0bbd327eff5931380a153395d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3305958
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Dennis Kempin <denniskempin@google.com>
Commit-Queue: Keiichi Watanabe <keiichiw@chromium.org>

.github/workflows/gh-pages.yml

@@ -28,9 +28,7 @@ jobs:
       - name: Run cargo doc
         run: |
           git submodule update --init
-          # TODO audio_cras, chromeos, power-monitor-powerd
-          cargo doc --target-dir ./docs/target/ \
-          --features "audio composite-disk default default-no-sandbox direct gdb gfxstream gpu plugin tpm usb video-decoder video-encoder virgl_renderer virgl_renderer_next wl-dmabuf x"
+          ./tools/cargo-doc --target-dir ./docs/target/
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v3
         with:

ci/kokoro/build-x86_64.sh

@@ -8,4 +8,5 @@ source "$(dirname $0)/common.sh"
     ./tools/run_tests --target=host -v \
     && ./tools/clippy \
     && ./tools/fmt --check \
-    && mdbook build ./docs/book"
+    && mdbook build ./docs/book \
+    && ./tools/cargo-doc"

tools/cargo-doc

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+# Copyright 2021 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+set -ex
+
+# Build cargo-doc
+# $ ./tools/cargo-doc --target-dir /path/to/dir
+
+echo "start cargo-doc"
+
+MANIFEST_PATH=$(dirname "$0")/../Cargo.toml
+
+echo "manifest = ${MANIFEST_PATH}"
+
+DISABLED_FEATURES=(
+    audio_cras
+    chromeos
+    power-monitor-powerd
+)
+
+ALL_FEATURES=$(
+    cargo metadata --manifest-path "${MANIFEST_PATH}" | \
+    jq -r '.packages[] |
+        select(.name == "crosvm") |
+        .features |
+        keys[]')
+
+features=""
+
+for f in $ALL_FEATURES; do
+    if [[ ! "${DISABLED_FEATURES[*]}" =~ $f ]]; then
+        features+=",${f}"
+    fi
+done
+
+cargo doc \
+      --manifest-path="${MANIFEST_PATH}" \
+      --features="${features}" "$@"