Deprecate @master

README.md

@@ -33,3 +33,13 @@ jobs:
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
 ```
+
+
+### 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

@@ -17,12 +17,18 @@ inputs:
 runs:
   using: 'composite'
   steps:
+  - name: 'DEPRECATION WARNING: julia-actions/julia-buildpkg@master will no longer receive updates and will start to error in the future. Please use version tags like julia-actions/julia-buildpkg@v1 or commit SHAs in your workflows!'
+    run: |
+      echo "::warning title=DEPRECATION WARNING::julia-actions/julia-buildpkg@master will no longer receive updates and will start to error in the future. Please use version tags like julia-actions/julia-buildpkg@v1 or commit SHAs in your workflows!"
+      echo "# :warning: DEPRECATION WARNING :warning: julia-actions/julia-buildpkg@master will no longer receive updates and will start to error in the future. Please use version tags like julia-actions/julia-buildpkg@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}" >> ${GITHUB_ENV}
+    shell: bash
   - run: |
-      isfile("deps/build.jl") || exit()
       import Pkg
       VERSION >= v"1.5-" && Pkg.Registry.add("General")
       VERSION >= v"1.1.0-rc1" ? Pkg.build(verbose=true) : Pkg.build()
     shell: julia --color=yes --project=${{ inputs.project }} {0}
     env:
-      JULIA_PKG_SERVER_REGISTRY_PREFERENCE: "${{ env.JULIA_PKG_SERVER_REGISTRY_PREFERENCE == '' && 'eager' || env.JULIA_PKG_SERVER_REGISTRY_PREFERENCE }}"
       JULIA_PKG_PRECOMPILE_AUTO: "${{ inputs.precompile }}"