Fix MacOS missing the sha256sum command in CI

Author: jjudd

distro/relnotes.bzl

@@ -7,7 +7,7 @@ def print_rel_notes(*, name, version, archive):
         cmd = """
               last_rel=$$(git describe --tags --abbrev=0)
               changelog=$$(/usr/bin/git log tags/$$last_rel..HEAD --format=oneline --invert-grep --grep 'ignore-relnotes' --)
-              sha=$$(/usr/bin/sha256sum $(SRCS) | cut -d ' '  -f1)
+              sha=$$(/usr/bin/shasum -a 256 $(SRCS) | cut -d ' '  -f1)
               cat > $@ <<EOF
 **Changes since $$last_rel**
 $$changelog

java/bazel/BUILD.bazel

@@ -30,7 +30,7 @@ while read -r config; do
     IFS=\\| read -r name version urls strip_prefix target_compatible_with primary_url <<< "$$config"
     echo "fetching: $$primary_url to $$TMP_FILE" > /dev/stderr
     curl --silent --fail -o $$TMP_FILE -L "$$primary_url" > /dev/stderr
-    sha256=`sha256sum $$TMP_FILE | cut -d' ' -f1`
+    sha256=`shasum -a 256 $$TMP_FILE | cut -d' ' -f1`
     echo "struct("
     echo "  name = \\"$$name\\","
     echo "  target_compatible_with = $$target_compatible_with,"

test/check_remote_java_tools_configs.sh

@@ -22,7 +22,7 @@ function download_and_check_hash() {
     TMP_FILE=$(mktemp -q /tmp/remotejavatools.XXXXXX)
     echo "fetching $name from $url to ${TMP_FILE}"
     curl --silent -o ${TMP_FILE} -L "$url"
-    actual_hash=`sha256sum ${TMP_FILE} | cut -d' ' -f1`
+    actual_hash=`shasum -a 256 ${TMP_FILE} | cut -d' ' -f1`
     if [ "${hash}" != "${actual_hash}" ]; then
       echo "ERROR: wrong hash for ${name}! wanted: ${hash}, got: ${actual_hash}"
       exit 1

test/check_remote_jdk_configs.sh

@@ -21,7 +21,7 @@ for config in "$@"; do
     IFS=, read -r name url mirror_url hash strip_prefix <<< "${config}"
     echo "fetching $name from $url to ${TMP_FILE}"
     curl --silent -o ${TMP_FILE} -L "$url"
-    actual_hash=$(sha256sum ${TMP_FILE} | cut -d' ' -f1)
+    actual_hash=$(shasum -a 256 ${TMP_FILE} | cut -d' ' -f1)
     if [ "${hash}" != "${actual_hash}" ]; then
       echo "ERROR: wrong hash for ${name}! wanted: ${hash}, got: ${actual_hash}"
       exit 1