add goreleaser

.github/workflows/release.yml

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+# This GitHub action can publish assets for release when a tag is created.
+# Currently its setup to run on any tag that matches the pattern "v*" (ie. v0.1.0).
+#
+# This uses an action (paultyng/ghaction-import-gpg) that assumes you set your
+# private key in the `GPG_PRIVATE_KEY` secret and passphrase in the `PASSPHRASE`
+# secret. If you would rather own your own GPG handling, please fork this action
+# or use an alternative one for key handling.
+#
+# You will need to pass the `--batch` flag to `gpg` in your signing step
+# in `goreleaser` to indicate this is being used in a non-interactive mode.
+#
+
+name: release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Unshallow
+        run: git fetch --prune --unshallow
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.21.0'
+
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v4
+        with:
+          version: latest
+          args: release --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.goreleaser.yml

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+# SPDX-FileCopyrightText: 2023 Christoph Mewes
+# SPDX-License-Identifier: MIT
+
+builds:
+  - dir: cmd/otti
+    binary: otti
+    env:
+      # goreleaser does not work with CGO, it could also complicate
+      # usage by users in CI/CD systems like Terraform Cloud where
+      # they are unable to install libraries.
+      - CGO_ENABLED=0
+    mod_timestamp: '{{ .CommitTimestamp }}'
+    flags:
+      - -trimpath
+    ldflags:
+      - '-s -w -X main.BuildTag={{.Version}} -X main.BuildCommit={{.Commit}} -X main.BuildDate={{.Date}}'
+    goos:
+      - darwin
+      - freebsd
+      - linux
+      - windows
+    goarch:
+      - amd64
+      - '386'
+      - arm64
+    ignore:
+      - goos: darwin
+        goarch: '386'
+      - goos: freebsd
+        goarch: '386'
+      - goos: windows
+        goarch: '386'
+archives:
+  - format: tar.gz
+    name_template: 'otti_{{ .Version }}_{{ .Os }}_{{ .Arch }}'
+    wrap_in_directory: true
+    strip_parent_binary_folder: true
+    format_overrides:
+      - goos: windows
+        format: zip
+checksum:
+  disable: true