uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/libraries/v8/update.sh

@@ -0,0 +1,62 @@
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p curl -p nix-prefetch-git -p jq
+VERSION_OVERVIEW=https://omahaproxy.appspot.com/all?os=linux
+TARGET_CHANNEL=stable
+
+set -eo pipefail
+
+if [ -n "$1" ]; then
+  v8_version="$1"
+  shift
+else
+  v8_version=$(curl -s "$VERSION_OVERVIEW" | awk -F "," "\$2 ~ /${TARGET_CHANNEL}/ { print \$11 }")
+fi
+
+if [ -n "$1" ]; then
+  file_path="$1"
+else
+  file_path=default.nix
+fi
+
+echo "Using V8 version --> $v8_version"
+
+prefetched=$(nix-prefetch-git --no-deepClone https://chromium.googlesource.com/v8/v8 "refs/tags/${v8_version}")
+
+path=$(echo "$prefetched" | jq -r .path)
+sha256=$(echo "$prefetched" | jq -r .sha256)
+sed -e "s#\\(version = \\)\"[0-9\.]*\"#\1\"$v8_version\"#" -i ${file_path}
+sed -e "/v8Src = fetchgit/ { n; n; n; s/\".*\"/\"${sha256}\"/  }" -i ${file_path}
+
+deps="$path/DEPS"
+
+echo "$deps"
+
+echo "Processing gn"
+gn_rev=$(sed -ne "s/.*'gn_version': 'git_revision:\([^']*\).*/\1/p" < "$deps")
+gn_sha256=$(nix-prefetch-git --no-deepClone https://gn.googlesource.com/gn "$gn_rev" 2>/dev/null | jq -r .sha256)
+sed -e "/gnSrc = fetchgit/ { n; n; s/\".*\"/\"${gn_rev}\"/; n; s/\".*\"/\"${gn_sha256}\"/  }" -i ${file_path}
+
+sed -ne '/" = fetchgit {/ { s/.*"\(.*\)".*/\1/; p }' < ${file_path} | while read dep; do
+    echo "Processing dependency --> $dep"
+    escaped_dep=$(echo "$dep" | sed -e 's#/#\\/#g')
+    dep_rev=$(sed -ne "/'${escaped_dep}':/ { n; s#.*+ '##; s#'.*##;  p }" "$deps")
+
+    if [ "$dep_rev" = "" ]; then
+        echo "Failed to resolve dependency $dep, not listed in DEPS file"
+        rm -f "$deps"
+        exit 2
+    fi
+
+    repo_url=$(sed -ne "/\"${escaped_dep}\" = fetchgit/ { n; s/.*\"\(.*\)\".*/\1/; s#\${git_url}#https://chromium.googlesource.com#; p }"  ${file_path})
+    sha256=$(nix-prefetch-git --no-deepClone "$repo_url" "$dep_rev" 2>/dev/null | jq -r .sha256)
+
+    if [ "$sha256" = "" ]; then
+        echo "Failed to get sha256 via nix-prefetch-git $repo_url $dep_rev"
+        rm -f "$deps"
+        exit 2
+    fi
+
+    sed -e "/\"${escaped_dep}\" = fetchgit/ { n; n; s/\".*\"/\"${dep_rev}\"/; n; s/\".*\"/\"${sha256}\"/  }" -i ${file_path}
+done
+
+echo done.