CI (Buildkite): Update the coverage_linux64 builder to version v3.1 of the llvm_passes.x86_64 rootfs image

Author: DilumAluthge

.buildkite/coverage-linux64/README.md

@@ -12,5 +12,5 @@ steps:
           # Our signed pipelines must have a `signature` or `signature_file` parameter that
           # verifies the treehash of the pipeline itself and the inputs listed in `inputs`
           signed_pipelines:
-            - pipeline: .buildkite/coverage-linux64/pipeline.yml
-              signature: U2FsdGVkX190BiaBGCTT6GNBDe5cHX3ZAP0IXbBfOWo7ys+1IuD5ymf4ImJbRIeE8NQac+iqud+bqCPHjii6DKmqzX+Jz6vax1NY3AxROhYlO5spUClvKr1wdngUCQON
+            - pipeline: .buildkite/scheduled/coverage_linux64.yml
+              signature: "U2FsdGVkX1/wRM6Tz/OVG7eyY+gQknhjeIpnRnGhEPnrk5U7ViPvgmDUAf1mX7Lfo+/uxgGJlHKDrFE5yI3s2Zv3Mox6aH0U3U4rYwRdfpFETjPbCVjMPJfCB9sdf6Ab"

.buildkite/coverage-linux64/0_webui.yml renamed to .buildkite/scheduled/0_webui.yml

@@ -0,0 +1,12 @@
+# Scheduled builds
+
+We use the [`julia-master->scheduled`](https://buildkite.com/julialang/julia-master-scheduled) pipeline for scheduled builds.
+
+These builds run on a schedule once per day. They are not triggered by GitHub webhooks.
+
+The scheduled builders are:
+- coverage_linux64
+
+Useful files:
+- [`0_webui.yml`](0_webui.yml)
+- [`coverage_linux64.yml`](coverage_linux64.yml)

.buildkite/scheduled/README.md

@@ -1,6 +1,5 @@
 # These steps should only run on `sandbox.jl` machines, not `docker`-isolated ones
-# since we need nestable sandboxing.  The rootfs images being used here are built from
-# the `.buildkite/rootfs_images/llvm-passes.jl` file.
+# since we need nestable sandboxing.
 agents:
   queue: "julia"
   # Only run on `sandbox.jl` machines (not `docker`-isolated ones) since we need nestable sandboxing
@@ -17,8 +16,8 @@ steps:
       - JuliaCI/julia#v1:
           version: 1.6
       - staticfloat/sandbox#v1:
-          rootfs_url: https://github.com/JuliaCI/rootfs-images/releases/download/v1/llvm-passes.tar.gz
-          rootfs_treehash: "f3ed53f159e8f13edfba8b20ebdb8ece73c1b8a8"
+          rootfs_url: https://github.com/JuliaCI/rootfs-images/releases/download/v3.1/llvm_passes.x86_64.tar.gz
+          rootfs_treehash: "9dd715500b117a16fcfa419ea0bca0c0ca902cee"
           uid: 1000
           gid: 1000
     commands: |
@@ -46,7 +45,7 @@ steps:
 
       echo "--- Process and upload coverage information"
       ./julia .buildkite/coverage-linux64/upload_coverage.jl
-    timeout_in_minutes: 600 # 600 minutes = 10 hours
+    timeout_in_minutes: 240 # 240 minutes = 4 hours
 
 # We must accept the signed job id secret in order to propagate secrets
 env: