fast_build.sh

#!/bin/bash -e
# Copyright 2020 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Minimal Go build script for an executable within a Chrome OS chroot.

# Personal Go workspace used to cache compiled packages.
readonly GOHOME="${HOME}/go"

# Directory where compiled packages are cached.
readonly PKGDIR="${GOHOME}/pkg"

###
### Customize these parts
###

# Go workspaces containing the source.
readonly SRCDIRS=(
  "${HOME}/trunk/infra/tnull"
)
# Package to build to produce executable.
readonly PKG="tnull"
# Output filename for executable.
readonly OUT="${GOHOME}/bin/tnull"

###
### End customized parts
###

# Readonly Go workspaces containing emerged source to build.
export GOPATH="$(IFS=:; echo "${SRCDIRS[*]}"):/usr/lib/gopath"

readonly CMD=$(basename "${0}")

# Builds an executable package to a destination path.
run_build() {
  local pkg="${1}"
  local dest="${2}"
  go build -i -pkgdir "${PKGDIR}" -o "${dest}" "${pkg}"
}

run_build "${PKG}" "${OUT}"