adding install.sh (#25) (#26)

* adding install.sh (#25)

* updating changelog

changelog/v0.2.4/updates.yaml

@@ -0,0 +1,4 @@
+changelog:
+  - type: NEW_FEATURE
+    description: Adding an install.sh script to simplify the installation of the Sqoop CLI
+    issueLink: https://github.com/solo-io/sqoop/issues/25

cli/install.sh

@@ -0,0 +1,60 @@
+#!/bin/sh
+
+set -eu
+
+
+SQOOP_VERSIONS=$(curl -sH"Accept: application/vnd.github.v3+json" https://api.github.com/repos/solo-io/sqoop/releases | python -c "import sys; from json import loads as l; releases = l(sys.stdin.read()); print('\n'.join(release['tag_name'] for release in releases))")
+
+if [ "$(uname -s)" = "Darwin" ]; then
+  OS=darwin
+else
+  OS=linux
+fi
+
+for SQOOP_VERSION in $SQOOP_VERSIONS; do
+
+tmp=$(mktemp -d /tmp/sqoop.XXXXXX)
+filename="sqoopctl-${OS}-amd64"
+url="https://github.com/solo-io/sqoop/releases/download/${SQOOP_VERSION}/${filename}"
+
+if curl -f ${url} >/dev/null 2>&1; then
+  echo "Attempting to download sqoopctl version ${SQOOP_VERSION}"
+else
+  continue
+fi
+
+(
+  cd "$tmp"
+
+  echo "Downloading ${filename}..."
+
+  SHA=$(curl -sL "${url}.sha256" | cut -d' ' -f1)
+  curl -sLO "${url}"
+  echo "Download complete!, validating checksum..."
+  checksum=$(openssl dgst -sha256 "${filename}" | awk '{ print $2 }')
+  if [ "$checksum" != "$SHA" ]; then
+    echo "Checksum validation failed." >&2
+    exit 1
+  fi
+  echo "Checksum valid."
+)
+
+(
+  cd "$HOME"
+  mkdir -p ".sqoop/bin"
+  mv "${tmp}/${filename}" ".sqoop/bin/sqoopctl"
+  chmod +x ".sqoop/bin/sqoopctl"
+)
+
+rm -r "$tmp"
+
+echo "Sqoop was successfully installed 🎉"
+echo ""
+echo "Add the sqoop CLI to your path with:"
+echo "  export PATH=\$HOME/.sqoop/bin:\$PATH"
+echo ""
+exit 0
+done
+
+echo "No versions of sqoopctl found."
+exit 1