ci: do not retry on forks to get the upstream kernel and rootfs

This commit introduces multiple changes:
  1. Now we check for mainline artifacts only when NOT running on
     the mainline branch
  2. if we run on the fork and get 404-like error, it doesn't retry.

Reviewed-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Signed-off-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22386>

.gitlab-ci/container/lava_build.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # shellcheck disable=SC1091 # The relative paths in this file only become valid at runtime.
 # shellcheck disable=SC2034 # Variables are used in scripts called from here
 # shellcheck disable=SC2086 # we want word splitting
@@ -11,13 +11,13 @@ export DEBIAN_FRONTEND=noninteractive
 check_minio()
 {
     MINIO_PATH="${MINIO_HOST}/mesa-lava/$1/${DISTRIBUTION_TAG}/${DEBIAN_ARCH}"
-    if curl -L --retry 4 -f --retry-all-errors --retry-delay 60 -s -X HEAD \
+    if curl -L --retry 4 -f --retry-delay 60 -s -X HEAD \
       "https://${MINIO_PATH}/done"; then
+        echo "Remote files are up-to-date, skip rebuilding them."
         exit
     fi
 }
 
-# If remote files are up-to-date, skip rebuilding them
 check_minio "${FDO_UPSTREAM_REPO}"
 check_minio "${CI_PROJECT_PATH}"
 

.gitlab-ci/lava/lava-submit.sh

@@ -1,15 +1,18 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e
 set -x
 
-# Try to use the kernel and rootfs built in mainline first, so we're more
-# likely to hit cache
-if curl -s -X HEAD -L --retry 4 -f --retry-all-errors --retry-delay 60 \
-    "https://${BASE_SYSTEM_MAINLINE_HOST_PATH}/done"; then
-	BASE_SYSTEM_HOST_PATH="${BASE_SYSTEM_MAINLINE_HOST_PATH}"
-else
+# If we run in the fork (not from mesa or Marge-bot), reuse mainline kernel and rootfs, if exist.
+BASE_SYSTEM_HOST_PATH="${BASE_SYSTEM_MAINLINE_HOST_PATH}"
+if [ "$CI_PROJECT_PATH" != "$FDO_UPSTREAM_REPO" ]; then
+    if ! curl -s -X HEAD -L --retry 4 -f --retry-delay 60 \
+      "https://${BASE_SYSTEM_MAINLINE_HOST_PATH}/done"; then
+	echo "Using kernel and rootfs from the fork, cached from mainline is unavailable."
 	BASE_SYSTEM_HOST_PATH="${BASE_SYSTEM_FORK_HOST_PATH}"
+    else
+	echo "Using the cached mainline kernel and rootfs."
+    fi
 fi
 
 rm -rf results