Test: delete "diff manifests" test case

This is not adding any value any more, since all image definitions are
defined in the osbuild/images repository and just vendored in this one.

Signed-off-by: Tomáš Hozza <thozza@redhat.com>

.gitlab-ci.yml

@@ -714,24 +714,6 @@ Installer:
           - rhos-01/rhel-9.4-nightly-x86_64
           - rhos-01/centos-stream-9-x86_64
 
-Manifest-diff:
-  stage: test
-  extends: .terraform
-  rules:
-    # don't run on main
-    - if: '$CI_COMMIT_BRANCH != "main"'
-  script:
-    - ./test/cases/diff-manifests.sh
-  variables:
-    RUNNER: aws/rhel-9.2-ga-x86_64
-    INTERNAL_NETWORK: "true"
-    GIT_STRATEGY: "clone"
-    GIT_CHECKOUT: "true"
-    GIT_DEPTH: 500
-  artifacts:
-    paths:
-      - manifests.diff
-
 SonarQube:
   stage: test
   extends: .terraform

test/cases/diff-manifests.sh

@@ -1,114 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-
-# NOTE: This script is executed differently in .gitlab-ci.yml so use a relative path
-source ./test/cases/shared_lib.sh
-
-function revert_to_head {
-   git checkout "$head"
-}
-
-if [[ "${CI_COMMIT_BRANCH}" != PR-* ]]; then
-    greenprint "${CI_COMMIT_BRANCH} is not a Pull Request"
-    greenprint "Skipping"
-    exit 0
-fi
-
-greenprint "Getting PR number"
-prnum="${CI_COMMIT_BRANCH#PR-}"
-
-greenprint "Installing jq"
-sudo dnf install -y jq
-
-greenprint "Getting base branch name"
-basebranch=$(curl  \
-    -u "${SCHUTZBOT_LOGIN}" \
-    -H 'Accept: application/vnd.github.v3+json' \
-    "https://api.github.com/repos/osbuild/osbuild-composer/pulls/${prnum}" | jq -r ".base.ref")
-
-greenprint "Adding upstream GitHub remote"
-# distro version branches aren't synced to GitLab, so we will need to fetch
-# them from GitHub directly
-git remote add gh https://github.com/osbuild/osbuild-composer
-git remote show gh
-
-greenprint "Fetching gh/${basebranch}"
-git fetch gh "${basebranch}"
-
-greenprint "Getting revision IDs for HEAD and merge-base"
-head=$(git rev-parse HEAD)
-mergebase=$(git merge-base HEAD "gh/${basebranch}")
-
-if [[ "${head}" == "${mergebase}" ]]; then
-    greenprint "HEAD and merge-base are the same"
-    greenprint "Test is unnecessary"
-    exit 0
-fi
-
-# We are compiling things, install the build requirements
-greenprint "Installing build dependencies"
-# first we need to install the rpm macros so that dnf can parse our spec file
-sudo dnf install -y redhat-rpm-config
-# now install our build requirements
-sudo dnf build-dep -y osbuild-composer.spec
-
-manifestdir=$(mktemp -d)
-
-greenprint "Generating all manifests for HEAD (PR #${prnum})"
-if ! go run ./cmd/gen-manifests --output "${manifestdir}/PR" --workers 50; then
-    redprint "Manifest generation on PR HEAD failed"
-    exit 1
-fi
-
-# revert to $head on exit
-trap revert_to_head EXIT
-greenprint "Checking out merge-base ${mergebase}"
-git checkout "${mergebase}"
-
-greenprint "Generating all manifests for merge-base (${mergebase})"
-# NOTE: it's not an error if this task fails; manifest generation on base
-# branch can be broken in a PR that fixes it.
-# As long as the generation on the PR HEAD succeeds, the job should succeed.
-merge_base_fail=""
-if ! go run ./cmd/gen-manifests --output "${manifestdir}/${mergebase}" --workers 50; then
-    redprint "Manifest generation on merge-base failed"
-    merge_base_fail="**NOTE:** Manifest generation on merge-base with \`${basebranch}\` (${mergebase}) failed.\n\n"
-fi
-
-greenprint "Diff: ${manifestdir}/${mergebase} ${manifestdir}/PR"
-if diff=$(diff -Naur "${manifestdir}"/"${mergebase}" "${manifestdir}/PR"); then
-    greenprint "No changes in manifests"
-    exit 0
-fi
-
-greenprint "Manifests differ"
-echo "${diff}" > "manifests.diff"
-greenprint "Saved diff in job artifacts"
-
-artifacts_url="${CI_JOB_URL}/artifacts/browse"
-
-review_data_file="review.json"
-cat > "${review_data_file}" << EOF
-{"body":"⚠️ This PR introduces changes in at least one manifest (when comparing PR HEAD ${head} with the ${basebranch} merge-base ${mergebase}).  Please review the changes.  The changes can be found in the [artifacts of the \`Manifest-diff\` job [0]](${artifacts_url}) as \`manifests.diff\`.\n\n${merge_base_fail}[0] ${artifacts_url}","event":"COMMENT"}
-EOF
-
-greenprint "Posting review comment"
-comment_req_out=$(mktemp)
-comment_status=$(curl \
-    -u "${SCHUTZBOT_LOGIN}" \
-    -X POST \
-    -H "Accept: application/vnd.github.v3+json" \
-    --show-error \
-    --write-out '%{http_code}' \
-    --output "${comment_req_out}" \
-    "https://api.github.com/repos/osbuild/osbuild-composer/pulls/${prnum}/reviews" \
-    -d @"${review_data_file}")
-
-cat "${comment_req_out}"
-
-if [[ "${comment_status}" != "200" ]]; then
-    redprint "Comment post failed (${comment_status})"
-    exit 1
-fi
-
-exit 0