Detect if the registry is already installed via tarball (#25)

README.md

@@ -26,10 +26,10 @@ jobs:
             julia-arch: x86
 
     steps:
-      - uses: actions/checkout@v1.0.0
-      - uses: julia-actions/setup-julia@latest
+      - uses: actions/checkout@v2
+      - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.julia-version }}
-      - uses: julia-actions/julia-buildpkg@master
-      - uses: julia-actions/julia-runtest@master
+      - uses: julia-actions/julia-buildpkg@v1
+      - uses: julia-actions/julia-runtest@v1
 ```

action.yml

@@ -10,6 +10,9 @@ inputs:
   project:
     description: 'Value passed to the --project flag. The default value is the repository root: "@."'
     default: '@.'
+  precompile:
+    description: 'Whether to allow auto-precompilation (via the `JULIA_PKG_PRECOMPILE_AUTO` env var). Options: yes | no. Default value: no.'
+    default: 'no'
 
 runs:
   using: 'composite'
@@ -33,3 +36,5 @@ runs:
 
   - run: julia --color=yes --project=${{ inputs.project }} -e 'using Pkg; if VERSION >= v"1.1.0-rc1"; Pkg.build(verbose=true); else Pkg.build(); end'
     shell: bash
+    env:
+      JULIA_PKG_PRECOMPILE_AUTO: "${{ inputs.precompile }}"

add_general_registry.jl

@@ -1,13 +1,24 @@
 using Pkg
 
-function general_registry_location()
+function tarball_general_registry_location()
+    reg_dir = joinpath(DEPOT_PATH[1], "registries")
+    general_registry_tarball = joinpath(reg_dir, "General.tar.gz")
+    registry_toml_file = joinpath(reg_dir, "General.toml")
+    return general_registry_tarball, registry_toml_file
+end
+
+function cloned_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()
+    general_registry_tarball, registry_toml_file = tarball_general_registry_location()
+    if isfile(general_registry_tarball) && isfile(registry_toml_file)
+        return true
+    end
+    general_registry_dir, registry_toml_file = cloned_general_registry_location()
     if !isdir(general_registry_dir)
         return false
     elseif !isfile(registry_toml_file)