add install_zip

plugins/python-build/bin/python-build

@@ -108,6 +108,10 @@ install_jar() {
   install_package_using "jar" 1 "$@"
 }
 
+install_zip() {
+  install_package_using "zip" 1 "$@"
+}
+
 install_package_using() {
   local package_type="$1"
   local package_type_nargs="$2"
@@ -384,6 +388,48 @@ download_jar() {
   download_tarball "$@"
 }
 
+fetch_zip() {
+  local package_name="$1"
+  local package_url="$2"
+  local mirror_url
+  local checksum
+
+  if [ "$package_url" != "${package_url/\#}" ]; then
+    checksum="${package_url#*#}"
+    package_url="${package_url%%#*}"
+
+    if [ -n "$PYTHON_BUILD_MIRROR_URL" ]; then
+      mirror_url="${PYTHON_BUILD_MIRROR_URL}/$checksum"
+    fi
+  fi
+
+  local package_filename="${package_name}.zip"
+  symlink_zip_from_cache "$package_filename" "$checksum" || {
+    echo "Downloading ${package_filename}..." >&2
+    { http head "$mirror_url" &&
+      download_zip "$mirror_url" "$package_filename" "$checksum"
+    } ||
+    download_zip "$package_url" "$package_filename" "$checksum"
+  }
+
+  { if unzip "$package_filename"; then
+      if [ -z "$KEEP_BUILD_PATH" ]; then
+        rm -f "$package_filename"
+      else
+        true
+      fi
+    fi
+  } >&4 2>&1
+}
+
+symlink_zip_from_cache() {
+  symlink_tarball_from_cache "$@"
+}
+
+download_zip() {
+  download_tarball "$@"
+}
+
 build_package() {
   local package_name="$1"
   shift