Update E2E tests script to provide option for using nightly releases

Some automated tests just need to run the integration tests / browser
E2E tests against a specific release version. They do not need to
build the application from scratch.

Add support for an environment variable `USE_NIGHTLY_RELEASE` which
bypasses the normal `npm install`, webpack build, ko build, etc. and
instead deploys the latest nightly release to the target environment.

scripts/release-installer

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Copyright 2020 The Tekton Authors
+# Copyright 2020-2023 The Tekton Authors
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
@@ -13,6 +13,14 @@
 
 BASE_RELEASE_URL="https://storage.googleapis.com/tekton-releases/dashboard"
 
+download() {
+  if type "curl" > /dev/null 2>&1; then
+    curl -sL $@
+  else
+    wget -q $@
+  fi
+}
+
 verifySupported() {
   if ! type "curl" > /dev/null 2>&1 && ! type "wget" > /dev/null 2>&1; then
     echo "Either curl or wget is required"
@@ -31,39 +39,23 @@ getReleaseURL() {
 
 build() {
   local VERSION=$1
-  if type "curl" > /dev/null 2>&1; then
-    curl -sL $(getReleaseURL $VERSION)/installer | bash -s -- build --version $@
-  elif type "wget" > /dev/null 2>&1; then
-    wget -q $(getReleaseURL $VERSION)/installer | bash -s -- build --version $@
-  fi
+  download $(getReleaseURL $VERSION)/installer | bash -s -- build --version $@
 }
 
 install() {
   local VERSION=$1
-  if type "curl" > /dev/null 2>&1; then
-    curl -sL $(getReleaseURL $VERSION)/installer | bash -s -- install --version $@
-  elif type "wget" > /dev/null 2>&1; then
-    wget -q $(getReleaseURL $VERSION)/installer | bash -s -- install --version $@
-  fi
+  download $(getReleaseURL $VERSION)/installer | bash -s -- install --version $@
 }
 
 uninstall() {
   local VERSION=$1
-  if type "curl" > /dev/null 2>&1; then
-    curl -sL $(getReleaseURL $VERSION)/installer | bash -s -- uninstall --version $@
-  elif type "wget" > /dev/null 2>&1; then
-    wget -q $(getReleaseURL $VERSION)/installer | bash -s -- uninstall --version $@
-  fi
+  download $(getReleaseURL $VERSION)/installer | bash -s -- uninstall --version $@
 }
 
 # help provides possible cli installation arguments
 help () {
   local VERSION=$1
-  if type "curl" > /dev/null 2>&1; then
-    curl -sL $(getReleaseURL $VERSION)/installer | bash -s -- "help"
-  elif type "wget" > /dev/null 2>&1; then
-    wget -q $(getReleaseURL $VERSION)/installer | bash -s -- "help"
-  fi
+  download $(getReleaseURL $VERSION)/installer | bash -s -- "help"
 }
 
 set -e

test/e2e-tests.sh

@@ -22,36 +22,35 @@ source $(dirname $0)/e2e-common.sh
 
 # Script entry point.
 
-SED="sed"
 START=1
 END=30
 PLATFORM=${PLATFORM:+"--platform $PLATFORM"}
 
-initOS() {
-  local OS=$(echo `uname`|tr '[:upper:]' '[:lower:]')
-
-  case "$OS" in
-    darwin*) SED='gsed';;
-  esac
-}
-
 if [ "${SKIP_INITIALIZE}" != "true" ]; then
   initialize $@
 else
   END=50
 fi
 
-initOS
 install_buildx
-install_kustomize
+if [ "${USE_NIGHTLY_RELEASE}" != "true" ]; then
+  install_kustomize
+fi
 
 test_dashboard() {
   local readonly=true
   if [[ "$@" =~ "--read-write" ]]; then
     readonly=false
   fi
   header "Setting up environment ($@)"
-  $tekton_repo_dir/scripts/installer install $@
+  if [ "${USE_NIGHTLY_RELEASE}" == "true" ]; then
+    echo "Installing nightly release"
+    $tekton_repo_dir/scripts/release-installer install --nightly latest $@
+  else
+    echo "Installing from HEAD"
+    $tekton_repo_dir/scripts/installer install $@
+  fi
+
   wait_dashboard_backend
   header "Running the e2e tests ($@)"
 

test/presubmit-tests.sh

@@ -108,11 +108,15 @@ function pre_unit_tests() {
 }
 
 function pre_integration_tests() {
-    local failed=0
+  local failed=0
+  if [ "${USE_NIGHTLY_RELEASE}" == "true" ]; then
+    echo "Using nightly release, skipping npm install and frontend build"
+  else
     node_npm_install || failed=1
     echo "Running frontend build"
     npm run build || failed=1
-    return ${failed}
+  fi
+  return ${failed}
 }
 
 function extra_initialization() {