linux-git-pull

#!/usr/bin/env bash
# SPDX-License-Identifier: GPL-3.0-or-later
# Copyright (c) Jarkko Sakkinen 2025

set -e

SOURCE="git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git"

usage() {
  echo "Usage: $0 -C <linux kernel tree> <tag> <mustache template>"
}

git_kernel() {
  git -C "$kernel_tree" "$@"
}

kernel_tree=

while [[ $# -gt 0 ]]; do
  case "$1" in
    -C|--kernel-tree)
      if [[ $# -lt 2 ]]; then
        usage >&2
        exit 1
      fi
      kernel_tree="$2"
      shift 2
      ;;
    -h|--help)
      usage
      exit 0
      ;;
    --)
      shift
      break
      ;;
    -*)
      echo "Unknown option: $1" >&2
      usage >&2
      exit 1
      ;;
    *)
      break
      ;;
  esac
done

if [[ -z "$kernel_tree" || $# -ne 2 ]]; then
  usage >&2
  exit 1
fi

if ! git -C "$kernel_tree" rev-parse --show-toplevel >/dev/null 2>&1; then
  echo "\"$kernel_tree\" is not a git repository" >&2
  exit 1
fi

tag="$1"
template="$2"
tag_ref="refs/tags/$tag"

if git_kernel show-ref --verify --quiet "$tag_ref"; then
  echo "\"$tag\" pre-exists"
  exit 1
fi

if git_kernel ls-remote --exit-code --refs --tags origin "$tag_ref" >/dev/null 2>&1; then
  echo "\"origin/$tag\" pre-exists"
  exit 1
fi

git_kernel tag -s "$tag"
git_kernel push origin "$tag"

printf "Waiting for '%s'" "$tag" >&2
while ! git ls-remote --exit-code --refs --tags "$SOURCE" "$tag_ref" >/dev/null 2>&1; do
  printf "." >&2
  sleep 1
done
printf " found\n" >&2

pull_request=$(git_kernel request-pull mainline/master "$SOURCE" "$tag")
sender="$(git_kernel config user.email)"
timestamp=$(date +"%a %b %e %H:%M:%S %Y")
output="git-pull-${tag}.mbox"
tmp_output="$(mktemp "${output}.XXXXXX")"

trap 'rm -f "$tmp_output"' EXIT

jq \
  --rawfile template "$template" \
  --arg tag "$tag" \
  --arg pull_request "$pull_request" \
  --arg sender "$sender" \
  --arg timestamp "$timestamp" \
  -rn '
    $template
    | gsub("{{sender}}"; $sender)
    | sub("{{timestamp}}"; $timestamp)
    | sub("{{tag}}"; $tag)
    | sub("{{pull_request}}"; $pull_request)
  ' > "$tmp_output"

if grep -Eq '\{\{[^}]+\}\}' "$tmp_output"; then
  echo "\"$template\" contains unresolved placeholders" >&2
  exit 1
fi

mv "$tmp_output" "$output"
trap - EXIT