Initial

.editorconfig

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+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 2
+indent_style = tab
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.yaml]
+indent_style = space

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2021 Peter Mescalchin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# Action Golang with cache
+
+Composite GitHub Action which combines the perfect pairing of [actions/setup-go](https://github.com/actions/setup-go) with [actions/cache](https://github.com/actions/cache) for the caching of both the Golang module and build caches.
+
+![nuts and gum](https://user-images.githubusercontent.com/1818757/134792061-2fb04549-ed6d-4e4d-a805-3de6ea90f261.jpg)
+
+Reducing all these workflow steps:
+
+```yaml
+steps:
+  - name: Setup Golang
+    uses: actions/setup-go@v2
+    with:
+      go-version: ~1.17
+  - name: Setup Golang caches
+    uses: actions/cache@v2
+    with:
+      path: |
+        ~/.cache/go-build
+        ~/go/pkg/mod
+      key: ${{ runner.os }}-golang-${{ hashFiles('**/go.sum') }}
+      restore-keys: |
+        ${{ runner.os }}-golang-
+```
+
+down to this:
+
+```yaml
+steps:
+  - name: Setup Golang with cache
+    uses: magnetikonline/action-golang-cache@v1
+    with:
+      go-version: ~1.17
+```
+
+Action correctly sets the build and module cache paths for Linux, macOS _and_ Windows runners as per the [Golang cache examples](https://github.com/actions/cache/blob/main/examples.md#go---modules).
+
+In addition an optional `cache-key-suffix` input can be used to control the generated cache key - handy where a Golang program is compiled multiple times for different binaries across multiple workflow definitions - resulting in different optimized build cache path contents:
+
+```yaml
+steps:
+  - name: Testing action
+    uses: magnetikonline/action-golang-cache@v1
+    with:
+      go-version: ~1.17
+      cache-key-suffix: -apples
+
+# cache key:   ${{ runner.os }}-golang-apples-${{ hashFiles('**/go.sum') }}
+# restore key: ${{ runner.os }}-golang-apples-
+```

action.yaml

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+name: Golang with cache
+author: Peter Mescalchin
+description: Setup requested Golang version with enabled module and build caching.
+
+inputs:
+  go-version:
+    description: The desired Go version to use.
+    required: true
+  cache-key-suffix:
+    description: Optional cache key suffix.
+    default:
+
+runs:
+  using: composite
+  steps:
+    - name: Setup Golang
+      uses: actions/setup-go@v2
+      with:
+        go-version: ${{ inputs.go-version }}
+    - name: Determine OS Golang paths
+      id: golang-path
+      run: |
+        buildPath="~/.cache/go-build"
+        modulePath="~/go/pkg/mod"
+
+        if [[ $RUNNER_OS == "macOS" ]]; then
+          buildPath="~/Library/Caches/go-build"
+        fi
+
+        if [[ $RUNNER_OS == "Windows" ]]; then
+          buildPath="~\AppData\Local\go-build"
+          modulePath="~\go\pkg\mod"
+        fi
+
+        echo "::set-output name=build::$buildPath"
+        echo "::set-output name=module::$modulePath"
+      shell: bash
+    - name: Setup Golang caches
+      uses: actions/cache@v2
+      with:
+        path: |
+          ${{ steps.golang-path.outputs.build }}
+          ${{ steps.golang-path.outputs.module }}
+        key: ${{ runner.os }}-golang${{ inputs.cache-key-suffix }}-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-golang${{ inputs.cache-key-suffix }}-