chore: add install-go.sh script (for local development) (#150)

Signed-off-by: Angelos Kolaitis <neoaggelos@gmail.com>

Author: neoaggelos

hack/scripts/install-go.sh

@@ -0,0 +1,35 @@
+#!/bin/bash -e
+
+# Usage:
+#    $ install-go.sh              # source Go version from go.mod
+#    $ install-go.sh 1.24.7       # install specific Go version
+#
+# Description:
+#    - Download go version and install under /usr/local/go
+#    - Create symlinks for go and gofmt in /usr/local/bin
+
+VERSION="${1:-}"
+if [ -z "${VERSION}" ]; then
+  DIR="$(realpath "$(dirname "${0}")")"
+  VERSION="$(cat "${DIR}/../../go.mod" | grep "^go" | sed "s,^go\s,,")"
+
+  echo "Will install Go version from go.mod : ${VERSION}"
+fi
+
+# infer ARCH
+ARCH="$(uname -m)"
+if uname -m | grep -q x86_64; then ARCH=amd64; fi
+if uname -m | grep -q aarch64; then ARCH=arm64; fi
+
+# infer OS
+OS="$(uname -s)"
+if uname -s | grep -q Linux; then OS=linux; fi
+if uname -s | grep -q Darwin; then OS=darwin; fi
+
+fname="go${VERSION}.${OS}-${ARCH}.tar.gz"
+[ -f "$fname" ] || wget "https://go.dev/dl/go${VERSION}.${OS}-${ARCH}.tar.gz"
+sudo tar -C /usr/local -xvzf "${fname}"
+rm "${fname}"
+
+sudo ln -sf /usr/local/go/bin/go /usr/local/bin/go
+sudo ln -sf /usr/local/go/bin/gofmt /usr/local/bin/gofmt