ci: improve deploy-pr workflow (#8735)

scripts/deploy-pr.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+# Usage: ./deploy-pr.sh  --skip-build
+# deploys the current branch to a PR environment and posts login credentials to
+# [#pr-deployments](https://codercom.slack.com/archives/C05DNE982E8) Slack channel
+# if --skip-build is passed, the build step will be skipped and the last build image will be used
+
+set -euox pipefail
+
+branchName=$(gh pr view --json headRefName | jq -r .headRefName)
+
+if [[ "$branchName" == "main" ]]; then
+	prNumber=$(git rev-parse --short HEAD)
+else
+	prNumber=$(gh pr view --json number | jq -r .number)
+fi
+
+# if --skip-build is passed, the build job will be skipped and the last built image will be used
+if [[ "$*" == *--skip-build* ]]; then
+	skipBuild=true
+	#check if the image exists
+	foundTag=$(curl -fsSL https://github.com/coder/coder/pkgs/container/coder-preview | grep -o "$prNumber" | head -n 1)
+	if [ -z "${foundTag}" ]; then
+		echo "Image not found"
+		echo "${prNumber} tag not found in ghcr.io/coder/coder-preview"
+		echo "Please remove --skip-build and try again"
+		exit 1
+	fi
+else
+	skipBuild=false
+fi
+
+gh workflow run pr-deploy.yaml --ref "${branchName}" -f pr_number="${prNumber}" -f skip_build="${skipBuild}"