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1#!/bin/bash
2#
3# Download Go, verify its signature, and if that all succeeds, move the tarball
4# to go.tar.gz in the current directory.
5
6set -eu
7
8if [ $# -eq 0 ]; then
9 echo "usage: $0 <go version> [platform like linux-amd64]"
10 exit 1
11fi
12VERSION="${1}"
13PLATFORM="${2:-linux-amd64}"
14
15export GNUPGHOME="$(mktemp -d)"
16
17# From https://www.google.com/linuxrepositories/
18#
19# Key Details
20# Download: https://dl.google.com/linux/linux_signing_key.pub
21# Key ID: Google, Inc. Linux Package Signing Key <linux-packages-keymaster@google.com>
22# Fingerprint: 4CCA 1EAF 950C EE4A B839 76DC A040 830F 7FAC 5991
23# Google, Inc. (Linux Package Signing Authority) <linux-packages-keymaster@google.com>
24# Fingerprint: EB4C 1BFD 4F04 2F6D DDCC EC91 7721 F63B D38B 4796
25gpg2 --import <<EOF
26-----BEGIN PGP PUBLIC KEY BLOCK-----
27Version: GnuPG v1.4.2.2 (GNU/Linux)
28
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54/FJG
55=Quqp
56-----END PGP PUBLIC KEY BLOCK-----
57-----BEGIN PGP PUBLIC KEY BLOCK-----
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222=ilBW
223-----END PGP PUBLIC KEY BLOCK-----
224EOF
225
226
227OUTPUT_DIR="$(mktemp -d)"
228FILENAME="go${VERSION}.${PLATFORM}.tar.gz"
229OUTPUT_FILE="${OUTPUT_DIR}/${FILENAME}"
230curl -fsSL "https://dl.google.com/go/${FILENAME}.asc" -o "${OUTPUT_FILE}.asc"
231curl -fsSL "https://dl.google.com/go/${FILENAME}" -o "${OUTPUT_FILE}"
232
233gpg2 --verify --trust-model=always "${OUTPUT_FILE}.asc" "${OUTPUT_FILE}"
234
235mv "${OUTPUT_FILE}" go.tar.gz
236
237rm -r "${OUTPUT_DIR}"
238rm -r "${GNUPGHOME}"
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