get_deployment_url.sh

get_deployment_url.sh

#!/bin/bash
# Output the current deployment URL for a PR.
# - Automatically determines the PR for your current branch if possible.
# Dependencies: `gh` and `jq`

ME=`basename $0`

# helpFunction([error message])
helpFunction()
{
  [[ $@ ]] && >&2 echo -e "ERROR: $@\n"
  >&2 echo "Usage: ${ME} [PR_NUMBER]"
  >&2 echo "Output is the current deployment url if found or empty string if not found."
  >&2 echo "Examples:"
  >&2 echo "${ME}"
  >&2 echo "${ME} 4173"
  exit 1 # Exit script after printing help
}

# Check dependencies and exit with an error if they are not found.
# Display some instructions on how to install them.
command -v gh >/dev/null ||
  helpFunction "Github CLI not found.\nInstall using 'brew install gh' then 'gh auth login'\nhttps://cli.github.com/manual/"

command -v jq >/dev/null ||
  helpFunction "jq command not found.\nInstall using 'brew install jq'\nhttps://stedolan.github.io/jq/"

# Get the PR number from the command line (if specified)
NUMBER=$1

# Otherwise get the PR for the current branch (if possible)
if [ -z "$NUMBER" ]; then
  NUMBER=$(gh pr status |
    sed -n '/Current branch/ {n;p;}' | # Print line after "Current branch"
    grep -Eo '\d+' | # Grab the numbers from the line
    head -n1 # Only the first number
  )

  # Stop if there is no PR.
  [[ "$NUMBER" ]] || exit 0
fi

QUERY='query($name: String!, $owner:String!, $number:Int!) {
  repository(name: $name, owner:$owner) {
    pullRequest(number: $number) {
      commits(last: 1) {
        nodes {
          commit {
            deployments(last:1 ) {
              nodes {
                latestStatus {
                        environmentUrl
                }
              }
            }
          }
        }
      }
    }
  }
}'

gh api graphql \
-F owner=':owner' \
-F name=':repo' \
-F number="$NUMBER" \
-f query="$QUERY" |
  jq -r '
    try .data.repository.pullRequest.commits.nodes[0].commit.deployments.nodes[0].latestStatus.environmentUrl
    catch "Could not find RE url. Please try again in a bit." |
    select (.!=null)
  '