1 files changed, 84 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/deps.sh b/third_party/jpeg-xl/deps.sh
new file mode 100755
index 0000000000..b6555e30ca
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+++ b/third_party/jpeg-xl/deps.sh
@@ -0,0 +1,84 @@
+#!/usr/bin/env bash
+# Copyright (c) the JPEG XL Project Authors. All rights reserved.
+#
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+# This file downloads the dependencies needed to build JPEG XL into third_party.
+# These dependencies are normally pulled by gtest.
+
+set -eu
+
+MYDIR=$(dirname $(realpath "$0"))
+
+# Git revisions we use for the given submodules. Update these whenever you
+# update a git submodule.
+THIRD_PARTY_BROTLI="36533a866ed1ca4b75cf049f4521e4ec5fe24727"
+THIRD_PARTY_HIGHWAY="46e365d6770f5d7a4240d8ac9d8e928a520478ea"
+THIRD_PARTY_SKCMS="b25b07b4b07990811de121c0356155b2ba0f4318"
+THIRD_PARTY_SJPEG="868ab558fad70fcbe8863ba4e85179eeb81cc840"
+THIRD_PARTY_ZLIB="cacf7f1d4e3d44d871b605da3b647f07d718623f"
+THIRD_PARTY_LIBPNG="a40189cf881e9f0db80511c382292a5604c3c3d1"
+
+# Download the target revision from GitHub.
+download_github() {
+  local path="$1"
+  local project="$2"
+
+  local varname=`echo "$path" | tr '[:lower:]' '[:upper:]'`
+  varname="${varname/\//_}"
+  local sha
+  eval "sha=\${${varname}}"
+
+  local down_dir="${MYDIR}/downloads"
+  local local_fn="${down_dir}/${sha}.tar.gz"
+  if [[ -e "${local_fn}" && -d "${MYDIR}/${path}" ]]; then
+    echo "${path} already up to date." >&2
+    return 0
+  fi
+
+  local url
+  local strip_components=0
+  if [[ "${project:0:4}" == "http" ]]; then
+    # "project" is a googlesource.com base url.
+    url="${project}${sha}.tar.gz"
+  else
+    # GitHub files have a top-level directory
+    strip_components=1
+    url="https://github.com/${project}/tarball/${sha}"
+  fi
+
+  echo "Downloading ${path} version ${sha}..." >&2
+  mkdir -p "${down_dir}"
+  curl -L --show-error -o "${local_fn}.tmp" "${url}"
+  mkdir -p "${MYDIR}/${path}"
+  tar -zxf "${local_fn}.tmp" -C "${MYDIR}/${path}" \
+    --strip-components="${strip_components}"
+  mv "${local_fn}.tmp" "${local_fn}"
+}
+
+
+main() {
+  if git -C "${MYDIR}" rev-parse; then
+    cat >&2 <<EOF
+Current directory is a git repository, downloading dependencies via git:
+
+  git submodule update --init --recursive
+
+EOF
+    git -C "${MYDIR}" submodule update --init --recursive --depth 1 --recommend-shallow
+    return 0
+  fi
+
+  # Sources downloaded from a tarball.
+  download_github third_party/brotli google/brotli
+  download_github third_party/highway google/highway
+  download_github third_party/sjpeg webmproject/sjpeg
+  download_github third_party/skcms \
+    "https://skia.googlesource.com/skcms/+archive/"
+  download_github third_party/zlib madler/zlib
+  download_github third_party/libpng glennrp/libpng
+  echo "Done."
+}
+
+main "$@"