searxng/utils/lib_go.sh

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#!/usr/bin/env bash
# -*- coding: utf-8; mode: sh indent-tabs-mode: nil -*-
# SPDX-License-Identifier: AGPL-3.0-or-later
#
# Tools to install and maintain golang [1] binaries & packages.
#
# [1] https://golang.org/doc/devel/release#policy
#
# A simple *helloworld* test with user 'my_user' :
#
# sudo -H adduser my_user
# ./manage go.golang go1.17.3 my_user
# ./manage go.install github.com/go-training/helloworld@latest my_user
# ./manage go.bash my_user
# $ helloword
# Hello World!!
#
# Don't forget to remove 'my_user': sudo -H deluser --remove-home my_user
# shellcheck source=utils/lib.sh
. /dev/null
# configure golang environment
# ----------------------------
[[ -z "${GO_VERSION}" ]] && GO_VERSION="go1.17.3"
GO_DL_URL="https://golang.org/dl"
# implement go functions
# -----------------------
go.help(){
cat <<EOF
go.:
ls : list golang binary archives (stable)
golang : (re-) install golang binary in user's \$HOME/local folder
install : install go package in user's \$HOME/go-apps folder
bash : start bash interpreter with golang environment sourced
EOF
}
go.ls(){
python3 <<EOF
import sys, json, requests
resp = requests.get("${GO_DL_URL}/?mode=json&include=all")
for ver in json.loads(resp.text):
if not ver['stable']:
continue
for f in ver['files']:
if f['kind'] != 'archive' or not f['size'] or not f['sha256'] or len(f['os']) < 2:
continue
print(" %(version)-10s|%(os)-8s|%(arch)-8s|%(filename)-30s|%(size)-10s|%(sha256)s" % f)
EOF
}
go.ver_info(){
# print informations about a golang distribution. To print filename
# sha256 and size of the archive that fits to your OS and host:
#
# go.ver_info "${GO_VERSION}" archive "$(go.os)" "$(go.arch)" filename sha256 size
#
# usage: go.ver_info <go-vers> <kind> <os> <arch> [filename|sha256|size]
#
# kind: [archive|source|installer]
# os: [darwin|freebsd|linux|windows]
# arch: [amd64|arm64|386|armv6l|ppc64le|s390x]
python3 - "$@" <<EOF
import sys, json, requests
resp = requests.get("${GO_DL_URL}/?mode=json&include=all")
for ver in json.loads(resp.text):
if ver['version'] != sys.argv[1]:
continue
for f in ver['files']:
if (f['kind'] != sys.argv[2] or f['os'] != sys.argv[3] or f['arch'] != sys.argv[4]):
continue
for x in sys.argv[5:]:
print(f[x])
sys.exit(0)
sys.exit(42)
EOF
}
go.os() {
local OS
case "$(command uname -a)xx" in
Linux\ *) OS=linux ;;
Darwin\ *) OS=darwin ;;
FreeBSD\ *) OS=freebsd ;;
CYGWIN* | MSYS* | MINGW*) OS=windows ;;
*) die 42 "OS is unknown: $(command uname -a)" ;;
esac
echo "${OS}"
}
go.arch() {
local ARCH
case "$(command uname -m)" in
"x86_64") ARCH=amd64 ;;
"aarch64") ARCH=arm64 ;;
"armv6" | "armv7l") ARCH=armv6l ;;
"armv8") ARCH=arm64 ;;
.*386.*) ARCH=386 ;;
ppc64*) ARCH=ppc64le ;;
*) die 42 "ARCH is unknown: $(command uname -m)" ;;
esac
echo "${ARCH}"
}
go.golang() {
# install golang binary in user's $HOME/local folder:
#
# go.golang ${GO_VERSION} ${SERVICE_USER}
#
# usage: go.golang <go-vers> [<username>]
local version fname sha size user userpr
local buf=()
version="${1:-${GO_VERSION}}"
user="${2:-${USERNAME}}"
userpr=" ${_Yellow}|${user}|${_creset} "
rst_title "Install Go in ${user}'s HOME" section
mapfile -t buf < <(
go.ver_info "${version}" archive "$(go.os)" "$(go.arch)" filename sha256 size
)
if [ ${#buf[@]} -eq 0 ]; then
die 42 "can't find info of golang version: ${version}"
fi
fname="${buf[0]}"
sha="${buf[1]}"
size="$(numfmt --to=iec "${buf[2]}")"
info_msg "Download go binary ${fname} (${size}B)"
cache_download "${GO_DL_URL}/${fname}" "${fname}"
pushd "${CACHE}" &> /dev/null
echo "${sha} ${fname}" > "${fname}.sha256"
if ! sha256sum -c "${fname}.sha256" >/dev/null; then
die 42 "downloaded file ${fname} checksum does not match"
else
info_msg "${fname} checksum OK"
fi
popd &> /dev/null
info_msg "install golang"
tee_stderr 0.1 <<EOF | sudo -i -u "${user}" | prefix_stdout "${userpr}"
mkdir -p \$HOME/local
rm -rf \$HOME/local/go
tar -C \$HOME/local -xzf ${CACHE}/${fname}
echo "export GOPATH=\$HOME/go-apps" > \$HOME/.go_env
echo "export PATH=\$HOME/local/go/bin:\\\$GOPATH/bin:\\\$PATH" >> \$HOME/.go_env
EOF
info_msg "test golang installation"
sudo -i -u "${user}" <<EOF
source \$HOME/.go_env
command -v go
go version
EOF
}
go.install() {
# install go package in user's $HOME/go-apps folder:
#
# go.install github.com/go-training/helloworld@lates ${SERVICE_USER}
#
# usage: go.install <package> [<username>]
local package user userpr
package="${1}"
user="${2:-${USERNAME}}"
userpr=" ${_Yellow}|${user}|${_creset} "
if [ -z "${package}" ]; then
die 42 "${FUNCNAME[0]}() - missing argument: <package>"
fi
tee_stderr 0.1 <<EOF | sudo -i -u "${user}" | prefix_stdout "${userpr}"
source \$HOME/.go_env
go install -v ${package}
EOF
}
go.bash() {
# start bash interpreter with golang environment sourced
#
# go.bash ${SERVICE_USER}
#
# usage: go.bash [<username>]
local user
user="${1:-${USERNAME}}"
sudo -i -u "${user}" bash --init-file "~${user}/.go_env"
}
go.version(){
local user
user="${1:-${USERNAME}}"
sudo -i -u "${user}" <<EOF
source \$HOME/.go_env
go version | cut -d' ' -f 3
EOF
}