Make Coverage checking more stable

circle.yml

@@ -0,0 +1,16 @@
+dependencies:
+  pre:
+    - ./circleci.sh install-deps
+  cache_directories:
+    - "~/dlang"
+
+test:
+  override:
+    - make -f posix.mak style
+    - ./circleci.sh coverage:
+        parallel: true
+
+  post:
+    # CodeCov gets confused by stored .lst files
+    - rm -rf test/coverage/generated
+    - bash <(curl -s https://codecov.io/bash)

circleci.sh

@@ -0,0 +1,74 @@
+#!/bin/bash
+
+set -uexo pipefail
+
+HOST_DMD_VER=2.068.2 # same as in dmd/src/posix.mak
+CURL_USER_AGENT="CirleCI $(curl --version | head -n 1)"
+N=2
+
+case $CIRCLE_NODE_INDEX in
+    0) MODEL=64 ;;
+    1) MODEL=32 ;;
+esac
+
+install_deps() {
+    if [ $MODEL -eq 32 ]; then
+        sudo apt-get update
+        sudo apt-get install g++-multilib
+    fi
+
+    for i in {0..4}; do
+        if curl -fsS -A "$CURL_USER_AGENT" --max-time 5 https://dlang.org/install.sh -O; then
+            break
+        elif [ $i -ge 4 ]; then
+            sleep $((1 << $i))
+        else
+            echo 'Failed to download install script' 1>&2
+            exit 1
+        fi
+    done
+
+    source "$(CURL_USER_AGENT=\"$CURL_USER_AGENT\" bash install.sh dmd-$HOST_DMD_VER --activate)"
+    $DC --version
+    env
+}
+
+# clone dmd
+clone() {
+    local url="$1"
+    local path="$2"
+    local branch="$3"
+    for i in {0..4}; do
+        if git clone --depth=1 --branch "$branch" "$url" "$path"; then
+            break
+        elif [ $i -lt 4 ]; then
+            sleep $((1 << $i))
+        else
+            echo "Failed to clone: ${url}"
+            exit 1
+        fi
+    done
+}
+
+coverage() {
+    if [ -n ${CIRCLE_PR_NUMBER:-} ]; then
+        local base_branch=$(curl -fsSL https://api.github.com/repos/dlang/dmd/pulls/$CIRCLE_PR_NUMBER | jq -r '.base.ref')
+    else
+        local base_branch=$CIRCLE_BRANCH
+    fi
+
+    clone https://github.com/dlang/dmd.git ../dmd $base_branch
+
+    # load environment for bootstrap compiler
+    source "$(CURL_USER_AGENT=\"$CURL_USER_AGENT\" bash ~/dlang/install.sh dmd-$HOST_DMD_VER --activate)"
+
+    # build dmd and druntime
+    make -j$N -C ../dmd/src -f posix.mak MODEL=$MODEL HOST_DMD=$DMD all
+    make -j$N -C ../dmd/src -f posix.mak MODEL=$MODEL HOST_DMD=$DMD dmd.conf
+    TEST_COVERAGE="1" make -j$N -C . -f posix.mak MODEL=$MODEL unittest-debug
+}
+
+case $1 in
+    install-deps) install_deps ;;
+    coverage) coverage ;;
+esac

posix.mak

@@ -304,6 +304,11 @@ clean: $(addsuffix /.clean,$(ADDITIONAL_TESTS))
 test/%/.clean: test/%/Makefile
 	$(MAKE) -C test/$* clean
 
+# Submission to Druntime are required to conform to the DStyle
+# The tests below automate some, but not all parts of the DStyle guidelines.
+# See: http://dlang.org/dstyle.html
+style: checkwhitespace
+
 .PHONY : auto-tester-build
 auto-tester-build: target checkwhitespace