Make the Resolver.jl-based testing a special test. (#2943)

[only special]

Author: maleadt

.buildkite/pipeline.yml

@@ -20,13 +20,6 @@ steps:
           cuda: "*"
         commands: |
           echo -e "[CUDA_Runtime_jll]\nlocal = \"true\"" >LocalPreferences.toml
-
-          # for non-nightly, use Resolver.jl to install the oldest package versions
-          if [[ "{{ matrix.julia }}" != "nightly" && "{{ matrix.julia }}" =~ ^[0-9]+\.[0-9]+$ ]]; then
-            git clone https://github.com/StefanKarpinski/Resolver.jl /tmp/Resolver
-            julia -e 'using Pkg; Pkg.activate("/tmp/Resolver/bin"); Pkg.instantiate()'
-            julia /tmp/Resolver/bin/resolve.jl . --min=@alldeps --julia="{{matrix.julia}}"
-          fi
         if: |
           build.message =~ /\[only tests\]/ ||
           build.message =~ /\[only julia\]/ ||
@@ -391,7 +384,7 @@ steps:
           - JuliaCI/julia#v1:
               version: "1.11"
           - JuliaCI/julia-test#v1:
-              test_args: "--gpu=0,1 core base libraries"
+              test_args: "--gpu=0,1 --quickfail core base libraries"
           - JuliaCI/julia-coverage#v1:
               dirs:
                 - src
@@ -409,6 +402,33 @@ steps:
             build.message !~ /\[skip special\]/
         timeout_in_minutes: 45
 
+      - label: ":older_man: Old dependencies"
+        plugins:
+          - JuliaCI/julia#v1:
+              version: "1.10" # use the oldest supported Julia version (and update below)
+          - JuliaCI/julia-test#v1:
+              test_args: "--quickfail core base"
+              allow_reresolve: false
+          - JuliaCI/julia-coverage#v1:
+              dirs:
+                - src
+                - lib
+                - examples
+        agents:
+          queue: "juliagpu"
+          cuda: "*"
+        commands: |
+          git clone https://github.com/StefanKarpinski/Resolver.jl /tmp/Resolver
+          julia -e 'using Pkg; Pkg.activate("/tmp/Resolver/bin"); Pkg.instantiate()'
+          julia /tmp/Resolver/bin/resolve.jl . --min=@alldeps --julia="1.10"
+        if: |
+          build.message =~ /\[only tests\]/ ||
+          build.message =~ /\[only special\]/ ||
+          build.message !~ /\[only/ && !build.pull_request.draft &&
+            build.message !~ /\[skip tests\]/ &&
+            build.message !~ /\[skip special\]/
+        timeout_in_minutes: 30
+
   - wait: ~
     continue_on_failure: true