Improve deprecation warning

Turns out GitHub doesn't forward @master to @main

README.md

@@ -78,3 +78,13 @@ If you only want to add this prefix on certain builds, you can [include addition
 ```
 
 This will add the prefix `xvfb-run` to all builds where the `os` is `ubuntu-latest`.
+
+
+### Registry flavor preference
+
+This actions defines (and exports for subsequent steps of the workflow) the
+environmental variable `JULIA_PKG_SERVER_REGISTRY_PREFERENCE=eager` unless it
+is already set. If you want another registry flavor (i.e. `conservative`) this
+should be defined in the `env:` section of the relevant workflow or step. See
+[Registry flavors](https://pkgdocs.julialang.org/dev/registries/#Registry-flavors)
+for more information.

action.yml

@@ -36,22 +36,14 @@ inputs:
 runs:
   using: 'composite'
   steps:
-    # Occasionally, there are rather large delays (> a few hours)
-    # between the time a package is registered in General and
-    # propagated to pkg.julialang.org.  We can avoid this by manually
-    # cloning ~/.julia/registries/General/ in Julia 1.5 and later.
-    # See:
-    # * https://github.com/JuliaLang/Pkg.jl/issues/2011
-    # * https://github.com/JuliaRegistries/General/issues/16777
-    # * https://github.com/JuliaPackaging/PkgServer.jl/issues/60
-    - run: julia --color=yes "$GITHUB_ACTION_PATH"/add_general_registry.jl
+    - name: 'DEPRECATION WARNING: julia-actions/julia-runtest@master will no longer receive updates and will start to error in the future. Please use version tags like julia-actions/julia-runtest@v1 or commit SHAs in your workflows!'
+      run: |
+        echo "::warning title=DEPRECATION WARNING::julia-actions/julia-runtest@master will no longer receive updates and will start to error in the future. Please use version tags like julia-actions/julia-runtest@v1 or commit SHAs in your workflows!"
+        echo "# :warning: DEPRECATION WARNING :warning: julia-actions/julia-runtest@master will no longer receive updates and will start to error in the future. Please use version tags like julia-actions/julia-runtest@v1 or commit SHAs in your workflows!" >> $GITHUB_STEP_SUMMARY
+      shell: bash
+    - name: Set and export registry flavor preference
+      run: echo "JULIA_PKG_SERVER_REGISTRY_PREFERENCE=${JULIA_PKG_SERVER_REGISTRY_PREFERENCE:-eager}" >> ${GITHUB_ENV}
       shell: bash
-      env:
-        # We set `JULIA_PKG_SERVER` only for this step to enforce
-        # `Pkg.Registry.add` to use Git.  This way, Pkg.jl can send
-        # the request metadata to pkg.julialang.org when installing
-        # packages via `Pkg.test`.
-        JULIA_PKG_SERVER: ""
     - name: Install dependencies in their own (shared) environment
       run: |
         if VERSION > v"1.8pre"

add_general_registry.jl

@@ -1,49 +0,0 @@
-using Pkg
-
-function general_registry_location()
-    general_registry_dir = joinpath(DEPOT_PATH[1], "registries", "General")
-    registry_toml_file = joinpath(general_registry_dir, "Registry.toml")
-    return general_registry_dir, registry_toml_file
-end
-
-function general_registry_exists()
-    general_registry_dir, registry_toml_file = general_registry_location()
-    if !isdir(general_registry_dir)
-        return false
-    elseif !isfile(registry_toml_file)
-        return false
-    else
-        return true
-    end
-end
-
-function add_general_registry()
-    @info("Attempting to clone the General registry")
-    general_registry_dir, registry_toml_file = general_registry_location()
-    rm(general_registry_dir; force = true, recursive = true)
-    Pkg.Registry.add("General")
-    isfile(registry_toml_file) || throw(ErrorException("the Registry.toml file does not exist"))
-    return nothing
-end
-
-function main(; n = 10, max_delay = 120)
-    VERSION >= v"1.5-" || return
-
-    if general_registry_exists()
-        @info("The General registry already exists locally")
-        return
-    end
-
-    delays = ExponentialBackOff(; n = n, max_delay = max_delay)
-    try
-        retry(add_general_registry; delays = delays)()
-        @info("Successfully added the General registry")
-    catch ex
-        msg = "I was unable to add the General registry. However, the build will continue."
-        @error(msg, exception=(ex,catch_backtrace()))
-    end
-
-    return
-end
-
-main()