1 files changed, 76 insertions, 0 deletions
diff --git a/mfbt/double-conversion/update.sh b/mfbt/double-conversion/update.sh
new file mode 100755
index 0000000000..c6f1761de6
--- /dev/null
+++ b/mfbt/double-conversion/update.sh
@@ -0,0 +1,76 @@
+#!/bin/bash
+
+# Usage: ./update.sh [<git-rev-to-use>]
+#
+# Copies the needed files from a directory containing the original
+# double-conversion source that we need.  If no revision is specified, the tip
+# revision is used.  See GIT-INFO for the last revision used.
+
+set -e
+
+LOCAL_PATCHES=""
+
+LOCAL_PATCHES="$LOCAL_PATCHES add-mfbt-api-markers.patch"
+LOCAL_PATCHES="$LOCAL_PATCHES use-mozilla-assertions.patch"
+LOCAL_PATCHES="$LOCAL_PATCHES ToPrecision-exponential.patch"
+LOCAL_PATCHES="$LOCAL_PATCHES debug-only-functions.patch"
+
+TMPDIR=`mktemp --directory`
+LOCAL_CLONE="$TMPDIR/new-double-conversion"
+
+git clone https://github.com/google/double-conversion.git "$LOCAL_CLONE"
+
+# If a particular revision was requested, check it out.
+if [ "$1" !=  "" ]; then
+  git -C "$LOCAL_CLONE" checkout "$1"
+fi
+
+# First clear out everything already present.
+DEST=./double-conversion
+mv "$DEST" "$TMPDIR"/old-double-conversion
+mkdir "$DEST"
+
+# Copy over critical files.
+cp "$LOCAL_CLONE/LICENSE" "$DEST/"
+cp "$LOCAL_CLONE/README.md" "$DEST/"
+
+# Includes
+for header in "$LOCAL_CLONE/double-conversion/"*.h; do
+  cp "$header" "$DEST/"
+done
+
+# Source
+for ccfile in "$LOCAL_CLONE/double-conversion/"*.cc; do
+  cp "$ccfile" "$DEST/"
+done
+
+# Now apply our local patches.
+for patch in $LOCAL_PATCHES; do
+  patch --directory "$DEST" --strip 4 < "$patch"
+
+  # Out-of-date patches may spew *.{orig,rej} when applied.  Report an error if
+  # any such file is found, and roll the source directory back to its previous
+  # state in such case.
+  detritus_files=`find "$DEST" -name '*.orig' -o -name '*.rej'`
+  if [ "$detritus_files" != "" ]; then
+    echo "ERROR: Local patch $patch created these detritus files when applied:"
+    echo ""
+    echo "  $detritus_files"
+    echo ""
+    echo "Please fix $patch before running $0."
+
+    rm -rf "$DEST"
+    mv "$TMPDIR"/source "$DEST"
+
+    exit 1
+  fi
+done
+
+# Update Mercurial file status.
+hg addremove "$DEST"
+
+# Note the revision used in this update.
+git -C "$LOCAL_CLONE" show > ./GIT-INFO
+
+# Delete the tmpdir.
+rm -rf "$TMPDIR"