Add option for how to install CKAN

allows for skipping installation entirely, as well as supporting non-debian-based operating systems in the future.

Author: drewcassidy

.github/actions/setup-ckan/action.yml

@@ -6,6 +6,10 @@ x-env:
     description: The path to use as the root of a KSP instance for CKAN to set-up. If not set, `/tmp/ksp` is used instead.
 
 inputs:
+  ckan-install-method:
+    description: Method of installing CKAN. Can be set to 'apt' to install from the official .deb file, or 'skip' to skip installation if your runner already has CKAN installed.
+    default: 'apt'
+
   ckan-version:
     description: CKAN tag to install. set to an empty string to always install the most recent version. See [the CKAN releases page](https://github.com/KSP-CKAN/CKAN/tags) for a list of available tags
     default: ''
@@ -42,7 +46,8 @@ runs:
       shell: bash
       run: echo 'KSP_ROOT=${{ '/tmp/ksp' }}' >> "$GITHUB_ENV"
 
-    - name: Install CKAN
+    - name: Install CKAN via apt
+      if: ${{ inputs.ckan-install-method == 'apt' }}
       shell: bash
       run: |
         sudo rm -f /var/lib/man-db/auto-update # skip updating man pages, which takes a long time and makes no sense in a CI job
@@ -53,14 +58,14 @@ runs:
       env:
         GH_TOKEN: ${{ github.token }}
 
-    - name: Setup CKAN Instance
+    - name: Setup fake KSP instance
       shell: bash
       run: |
         ${{ runner.debug && 'echo "$PATH"' }}
         ckan instance fake --set-default KSP ${{ env.KSP_ROOT }} 1.12.5 --game KSP --MakingHistory 1.9.1 --BreakingGround 1.7.1  ${{ runner.debug && '--verbose' }}
         ckan update
 
-    - name: Setup CKAN Compatible Versions
+    - name: Setup CKAN compatible versions
       shell: bash
       if: inputs.ckan-compatible-versions != ''
       run: |
@@ -70,7 +75,7 @@ runs:
       env:
         VERSIONS: ${{ inputs.ckan-compatible-versions }}
 
-    - name: Setup CKAN Filter
+    - name: Setup CKAN filter
       shell: bash
       if: inputs.ckan-filters != ''
       run: |

CHANGELOG.md

@@ -29,6 +29,7 @@ All notable changes to this project will be documented in this file
 - `compile` action: Use `dotnet restore` instead of `nuget restore` by default, allowing the action to work on any Ubuntu runner image. Added the `use-nuget-restore` option to restore the previous behavior for projects that use packages.config for dependencies. (#68)
 - `compile` action: Removed call to`actions/setup-dotnet`. Setting up .NET should be done as a separate step. (#65)
 - `setup-ckan` action: Sped up execution by skipping recommended packages and man-db updates
+- `setup-ckan` action: Add `ckan-install-method` option for installation method. Currently supports `'apt'` for installation on Debian/Ubuntu, or `'skip'` to skip installation for runners that already have CKAN installed.
 - `assemble-release` action: `outputs.artifact-path` now includes the `.zip` extension (#51)