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 LOCAL_PR_BRANCH="$PR_BRANCH"-"$PR_USER"
  64 PR_REPO="$(echo "$PR_INFO" | jq -r ".head.repo.html_url")"
  65
  66 if ! $GIT remote get-url $PR_USER &> /dev/null || [ -n "$DRY_RUN" ]; then
  67         echo "Adding $PR_USER with repo $PR_REPO to remote"
  68         $GIT remote add  $PR_USER $PR_REPO
  69 fi
  70
  71 echo "Fetching remote $PR_USER"
  72 $GIT fetch $PR_USER
  73
  74 echo "Creating branch $LOCAL_PR_BRANCH for $PR_BRANCH"
  75 if ! $GIT checkout -b $LOCAL_PR_BRANCH $PR_USER/$PR_BRANCH; then
  76         echo "Failed to checkout new branch $PR_BRANCH from $PR_USER/$PR_BRANCH" >&2
  77         exit 8
  78 fi
  79
  80 echo "Rebasing $LOCAL_PR_BRANCH on top of $BRANCH"
  81 if ! $GIT rebase origin/$BRANCH; then
  82         echo "Failed to rebase $PR_BRANCH with origin/$BRANCH" >&2
  83         exit 9
  84 fi
  85
  86 echo "Force pushing $LOCAL_PR_BRANCH to HEAD:$PR_BRANCH for $PR_USER"
  87 if ! $GIT push $PR_USER HEAD:$PR_BRANCH --force; then
  88         echo "Failed to force push HEAD to $PR_USER" >&2
  89         exit 10
  90 fi
  91
  92 echo "Returning to $BRANCH"
  93 $GIT checkout $BRANCH
  94
  95 echo "Actually merging the PR #$PRID from branch $PR_USER/$PR_BRANCH"
  96 if ! $GIT merge --ff-only $PR_USER/$PR_BRANCH; then
  97         echo "Failed to merge $PR_USER/$PR_BRANCH on $BRANCH" >&2
  98         exit 11
  99 fi
 100
 101 echo "Pushing to openwrt git server"
 102 if ! $GIT push; then
 103         echo "Failed to push to $BRANCH but left branch as is." >&2
 104         exit 12
 105 fi
 106
 107 echo "Deleting branch $LOCAL_PR_BRANCH"
 108 $GIT branch -D $LOCAL_PR_BRANCH
 109
 110 # Default close comment
 111 COMMENT="Thanks! Rebased on top of $BRANCH and merged!"
 112
 113 if [ -n "$TOKEN" ] && [ -z "$DRY_RUN" ]; then
 114         echo ""
 115         echo "Enter a comment and hit <enter> to close the PR at Github automatically now."
 116         echo "Hit <ctrl>-<c> to exit."
 117         echo ""
 118         echo "If you do not provide a comment, the default will be: "
 119         echo "[$COMMENT]"
 120
 121         echo -n "Comment > "
 122         read usercomment
 123
 124         echo "Sending message to PR..."
 125
 126         comment="${usercomment:-$COMMENT}"
 127         comment="${comment//\\/\\\\}"
 128         comment="${comment//\"/\\\"}"
 129         comment="$(printf '{"body":"%s"}' "$comment")"
 130
 131         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" || \
 132            ! 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/$PRID"
 133         then
 134                 echo ""                                                     >&2
 135                 echo "Something failed while sending comment to the PR via ">&2
 136                 echo "the Github API, please review the state manually at " >&2
 137                 echo "https://github.com/$REPO/pull/$PRID"                  >&2
 138                 exit 6
 139         fi
 140 fi
 141
 142 echo ""
 143 echo "The PR has been merged!"
 144
 145 exit 0