github-merge-pr.sh

   1 #!/bin/bash
   2
   3 # Github repository, just the name/repo part, no .git suffix, no base url!
   4 REPO="openwrt/openwrt"
   5
   6 # Your repository token, generate this token at your profile page:
   7 # - Navigate to https://github.com/settings/tokens
   8 # - Click on "Generate new token"
   9 # - Enter a description, e.g. "pr.sh" and pick the "repo" scope
  10 # - Hit "Generate token"
  11 #TOKEN="d41d8cd98f00b204e9800998ecf8427e"
  12
  13 PRID="$1"
  14 BRANCH="${2:-master}"
  15 DRY_RUN="$3"
  16 GIT=git
  17
  18 if ! command -v jq &> /dev/null; then
  19         echo "jq could not be found! This script require jq!"
  20         exit 1
  21 fi
  22
  23 if [ -z "$PRID" -o -n "${PRID//[0-9]*/}" ]; then
  24         echo "Usage: $0 <PR-ID> [rebase-branch] [dry-run]" >&2
  25         exit 1
  26 fi
  27
  28 if [ -n "$DRY_RUN" ]; then
  29         GIT="echo git"
  30 fi
  31
  32 if [ -z "$(git branch --list "$BRANCH")" ]; then
  33         echo "Given rebase branch '$BRANCH' does not exist!" >&2
  34         exit 2
  35 fi
  36
  37 if ! PR_INFO="$(curl -f -s "https://api.github.com/repos/$REPO/pulls/$PRID")"; then
  38         echo "Failed fetch PR #$PRID info" >&2
  39         exit 3
  40 fi
  41
  42 if [ "$(echo "$PR_INFO" | jq -r ".maintainer_can_modify")" == "false" ]; then
  43         echo "PR #$PRID can't be force pushed by maintainers. Can't merge this PR!" >&2
  44         exit 4
  45 fi
  46
  47 if [ "$(echo "$PR_INFO" | jq -r ".mergeable")" == "false" ]; then
  48         echo "PR #$PRID is not mergeable for Github.com. Check the PR!" >&2
  49         exit 5
  50 fi
  51
  52 echo "Pulling current $BRANCH from origin"
  53 $GIT checkout $BRANCH
  54 $GIT fetch origin
  55
  56 if ! $GIT rebase origin/$BRANCH; then
  57         echo "Failed to rebase $BRANCH with origin/$BRANCH" >&2
  58         exit 7
  59 fi
  60
  61 PR_USER="$(echo "$PR_INFO" | jq -r ".head.user.login")"
  62 PR_BRANCH="$(echo "$PR_INFO" | jq -r ".head.ref")"
  63 PR_REPO="$(echo "$PR_INFO" | jq -r ".head.repo.html_url")"
  64
  65 if ! $GIT remote get-url $PR_USER &> /dev/null || [ -n "$DRY_RUN" ]; then
  66         echo "Adding $PR_USER with repo $PR_REPO to remote"
  67         $GIT remote add  $PR_USER $PR_REPO
  68 fi
  69
  70 echo "Fetching remote $PR_USER"
  71 $GIT fetch $PR_USER
  72
  73 echo "Creating branch $PR_BRANCH"
  74 if ! $GIT checkout -b $PR_BRANCH $PR_USER/$PR_BRANCH; then
  75         echo "Failed to checkout new branch $PR_BRANCH from $PR_USER/$PR_BRANCH" >&2
  76         exit 8
  77 fi
  78
  79 echo "Rebasing $PR_BRANCH on top of $BRANCH"
  80 if ! $GIT rebase origin/$BRANCH; then
  81         echo "Failed to rebase $PR_BRANCH with origin/$BRANCH" >&2
  82         exit 9
  83 fi
  84
  85 echo "Force pushing $PR_BRANCH to $PR_USER"
  86 if ! $GIT push $PR_USER HEAD --force; then
  87         echo "Failed to force push HEAD to $PR_USER" >&2
  88         exit 10
  89 fi
  90
  91 echo "Returning to $BRANCH"
  92 $GIT checkout $BRANCH
  93
  94 echo "Actually merging the PR #$PRID from branch $PR_USER/$PR_BRANCH"
  95 if ! $GIT merge --ff-only $PR_USER/$PR_BRANCH; then
  96         echo "Failed to merge $PR_USER/$PR_BRANCH on $BRANCH" >&2
  97         exit 11
  98 fi
  99
 100 echo "Pushing to openwrt git server"
 101 if ! $GIT push; then
 102         echo "Failed to push to $BRANCH but left branch as is." >&2
 103         exit 12
 104 fi
 105
 106 echo "Deleting branch $PR_BRANCH"
 107 $GIT branch -D $PR_BRANCH
 108
 109 # Default close comment
 110 COMMENT="Thanks! Rebased on top of $BRANCH and merged!"
 111
 112 if [ -n "$TOKEN" ] && [ -z "$DRY_RUN" ]; then
 113         echo ""
 114         echo "Enter a comment and hit <enter> to close the PR at Github automatically now."
 115         echo "Hit <ctrl>-<c> to exit."
 116         echo ""
 117         echo "If you do not provide a comment, the default will be: "
 118         echo "[$COMMENT]"
 119
 120         echo -n "Comment > "
 121         read usercomment
 122
 123         echo "Sending message to PR..."
 124
 125         comment="${usercomment:-$COMMENT}"
 126         comment="${comment//\\/\\\\}"
 127         comment="${comment//\"/\\\"}"
 128         comment="$(printf '{"body":"%s"}' "$comment")"
 129
 130         if ! curl -s -o /dev/null -w "%{http_code} %{url_effective}\\n" --user "$TOKEN:x-oauth-basic" --request POST --data "$comment" "https://api.github.com/repos/$REPO/issues/$PRID/comments" || \
 131            ! curl -s -o /dev/null -w "%{http_code} %{url_effective}\\n" --user "$TOKEN:x-oauth-basic" --request PATCH --data '{"state":"closed"}' "https://api.github.com/repos/$REPO/pulls/$PRID"
 132         then
 133                 echo ""                                                     >&2
 134                 echo "Something failed while sending comment to the PR via ">&2
 135                 echo "the Github API, please review the state manually at " >&2
 136                 echo "https://github.com/$REPO/pull/$PRID"                  >&2
 137                 exit 6
 138         fi
 139 fi
 140
 141 echo ""
 142 echo "The PR has been merged!"
 143
 144 exit 0