Add default reviewers to bitbucket-server pull requests where there are currently 0 reviewers

add_default_reviewers.sh

#!/bin/bash

#set -x
set -e

host='https://my-code.local'

if ! which jq ; then
    echo 'jq not installed.' >&2
    exit 1
fi

username="$(whoami)"
echo "Username ($username):" >&2
read -r username_input
if ! [ "$username_input" = '' ]; then
    username="$username_input"
fi
password=''
while [ "$password" = '' ]; do
    echo "Password: " >&2
    read -s -r password
done

function handle_single_pr(){
    pr="$1"
    # echo "$pr"
    pr_id="$(jq -r '.id' <<< "$pr")"
    pr_version="$(jq -r '.version' <<< "$pr")"
    to_ref="$(jq -r '.toRef.id' <<< "$pr")"
    from_ref="$(jq -r '.fromRef.id' <<< "$pr")"
    to_repo="$(jq -r '.toRef.repository.id' <<< "$pr")"
    from_repo="$(jq -r '.fromRef.repository.id' <<< "$pr")"
    key="$(jq -r '.fromRef.repository.project.key' <<< "$pr")"
    repo_slug="$(jq -r '.fromRef.repository.slug' <<< "$pr")"
    default_reviewers="$(curl -s -f -u "${username}:${password}" "${host}/rest/default-reviewers/1.0/projects/$key/repos/$repo_slug/reviewers?sourceRefId=${from_ref}&targetRefId=${to_ref}&sourceRepoId=${from_repo}&targetRepoId=${to_repo}")"
    default_reviewers_formatted="$(jq -c '[ .[] | {"user":{"name":.name}}]' <<<"$default_reviewers")"
    body="{\"id\":${pr_id},\"version\":${pr_version},\"reviewers\":${default_reviewers_formatted}}"
    default_reviewers_printable="$(jq -c '[ .[] | .name ]' <<<"$default_reviewers")"

    curl -s -f -u "${username}:${password}" -X PUT -H 'Content-Type: application/json' -d "${body}" "${host}/rest/api/1.0/projects/${key}/repos/${repo_slug}/pull-requests/${pr_id}" > /dev/null
    echo "PUT default reviewers ${default_reviewers_printable} to pr against repo '${key}:${repo_slug}'"
    printf '.'
}

is_last_page=false
start=0
while [ "$is_last_page" == 'false' ] ; do
    prs_json="$(curl -s -f -u "${username}:${password}" "${host}/rest/api/1.0/dashboard/pull-requests?limit=10&state=OPEN&role=AUTHOR&start=${start}")"
    is_last_page="$(jq -r '.isLastPage' <<< "$prs_json")"
    size="$(jq -r '.size' <<< "$prs_json")"

    if [ "$size" == 0 ] ; then
        echo 'Nothing to do.'
        break
    else
        echo "Working start:$start is_last_page:$is_last_page size:$size"
        start=$((size+start))
        IFS='
'
        for pr in $(jq -c '.values[] | select((.reviewers | length) == 0)' <<< "$prs_json") ; do
            handle_single_pr "$pr" &
        done
        wait
    fi
done

echo ""
echo "Done"

No worries! Im glad to help

How are you getting/creating the source/targetRefId and the source/targetRepoId? Are they json objects like

Try this query out in your terminal and use jq to make it a bit more readable =)
https://gist.github.com/jensim/c157b935f3c3874bd9857509a6b36f82#file-add_default_reviewers-sh-L49

curl -s -f -u "${username}:${password}" "${host}/rest/api/1.0/dashboard/pull-requests?limit=10&state=OPEN&role=AUTHOR&start=${start}"

It's a paginated walk of the users open PRs, the ones you would find on the "Your work" page..
This scipt then takes filters the PRs that do not have any reviewers
for pr in $(jq -c '.values[] | select((.reviewers | length) == 0)' <<< "$prs_json") ; do
And the handle_single_pr function then takes the PR-info containing all the source&target info, and asks what the default reviewers of that PRs should be, then sends an update containing those reviewers.

Hi, thanks so much for getting back to me, was super helpful in what I was trying to do.

@MilesHopkins I'm glad you feel that way 🥳

Great work, thank you!