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/applications/version-management/sourcehut/update.sh

@@ -0,0 +1,76 @@
+#! /usr/bin/env nix-shell
+#! nix-shell -i bash -p git mercurial common-updater-scripts
+set -eux -o pipefail
+
+cd "$(dirname "${BASH_SOURCE[0]}")" || exit 1
+root=../../../..
+tmp=$(mktemp -d)
+trap 'rm -rf "$tmp"' EXIT
+
+default() {
+  (cd "$root" && nix-instantiate --eval --strict -A "sourcehut.python.pkgs.$1.meta.position" | sed -re 's/^"(.*):[0-9]+"$/\1/')
+}
+
+version() {
+  (cd "$root" && nix-instantiate --eval --strict -A "sourcehut.python.pkgs.$1.version" | tr -d '"')
+}
+
+src_url() {
+  nix-instantiate --eval --strict --expr " with import $root {}; let src = sourcehut.python.pkgs.$1.drvAttrs.src; in src.url or src.meta.homepage" | tr -d '"'
+}
+
+get_latest_version() {
+  src="$(src_url "$1")"
+  rm -rf "$tmp"
+  if [ "$1" = "hgsrht" ]; then
+    hg clone "$src" "$tmp" >/dev/null
+    printf "%s" "$(cd "$tmp" && hg log --limit 1 --template '{latesttag}')"
+  else
+    git clone "$src" "$tmp" >/dev/null
+    printf "%s" "$(cd "$tmp" && git describe "$(git rev-list --tags --max-count=1)")"
+  fi
+}
+
+update_version() {
+  default_nix="$(default "$1")"
+  oldVersion="$(version "$1")"
+  version="$(get_latest_version "$1")"
+
+  (cd "$root" && update-source-version "sourcehut.python.pkgs.$1" "$version")
+
+  # Update vendorSha256 of Go modules
+  retry=true
+  while "$retry"; do
+    retry=false;
+    exec < <(exec nix -L build -f "$root" sourcehut.python.pkgs."$1" 2>&1)
+    while IFS=' :' read -r origin hash; do
+      case "$origin" in
+        (expected|specified) oldHash="$hash";;
+        (got) sed -i "s|$oldHash|$hash|" "$default_nix"; retry=true; break;;
+        (*) printf >&2 "%s\n" "$origin${hash:+:$hash}"
+      esac
+    done
+  done
+
+  if [ "$oldVersion" != "$version" ]; then
+    git add "$default_nix"
+    git commit -m "sourcehut.$1: $oldVersion -> $version"
+  fi
+}
+
+if [ $# -gt 0 ]; then
+  services=("$@")
+else
+  # Beware that some packages must be updated before others,
+  # eg. buildsrht must be updated before gitsrht,
+  # otherwise this script would enter an infinite loop
+  # because the reported $oldHash to be changed
+  # may not actually be in $default_nix
+  # but in the file of one of its dependencies.
+  services=( "srht" "scmsrht" "buildsrht" "dispatchsrht" "gitsrht" "hgsrht" "hubsrht" "listssrht" "mansrht"
+             "metasrht" "pagessrht" "pastesrht" "todosrht" )
+fi
+
+for service in "${services[@]}"; do
+  update_version "$service"
+done