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chore: write build_go.sh script and dependencies
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‎scripts/build_go.sh

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#!/usr/bin/env bash
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# This script builds a single Go binary of Coder with the given parameters.
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#
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# Usage: ./build_go.sh [--version v1.2.3+devel.abcdef] [--os linux] [--arch amd64] [--output path/to/output] [--slim]
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#
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# Defaults to linux:amd64 with slim disabled, but can be controlled with GOOS,
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# GOARCH and CODER_SLIM_BUILD=1. If no version is specified, defaults to the
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# version from ./version.sh.
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#
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# Unless overridden via --output, the built binary will be dropped in
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# "$repo_root/dist/coder(-slim)?_$version_$os_$arch" (with a ".exe" suffix for
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# windows builds) and the absolute path to the binary will be printed to stdout
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# on completion.
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set -euo pipefail
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# shellcheck source=lib.sh
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source "$(dirname "${BASH_SOURCE[0]}")/lib.sh"
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version=""
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os="${GOOS:-linux}"
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arch="${GOARCH:-amd64}"
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slim="${CODER_SLIM_BUILD:-0}"
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output_path=""
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args="$(getopt -o "" -l version:,os:,arch:,output:,slim -- "$@")"
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eval set -- "$args"
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while true; do
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case "$1" in
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--version)
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version="$2"
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shift 2
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;;
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--os)
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os="$2"
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shift 2
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;;
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--arch)
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arch="$2"
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shift 2
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;;
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--output)
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output_path="$(realpath "$2")"
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shift 2
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;;
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--slim)
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slim=1
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shift
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;;
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--)
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shift
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break
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;;
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*)
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error "Unrecognized option: $1"
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;;
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esac
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done
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if [[ "$version" == "" ]]; then
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cdself
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version="$(./version.sh)"
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fi
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build_args=(
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-ldflags "-s -w -X 'github.com/coder/coder/buildinfo.tag=$version'"
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)
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if [[ "$slim" == 0 ]]; then
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build_args+=(-tags embed)
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fi
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# cd to the root of the repo.
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cdroot
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# Compute default output path.
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if [[ "$output_path" == "" ]]; then
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dist_dir="dist"
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mkdir -p "$dist_dir"
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output_path="${dist_dir}/coder_${version}_${os}_${arch}"
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if [[ "$os" == "windows" ]]; then
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output_path+=".exe"
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fi
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output_path="$(realpath "$output_path")"
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fi
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build_args+=(-o "$output_path")
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CGO_ENABLED=0 GOOS="$os" GOARCH="$arch" go build \
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"${build_args[@]}" \
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./cmd/coder 1>&2
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echo -n "$output_path"

‎scripts/lib.sh

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#!/usr/bin/env bash
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# This script is meant to be sourced by other scripts. To source this script:
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# source "$(dirname "${BASH_SOURCE[0]}")/lib.sh"
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set -euo pipefail
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SCRIPT_DIR=$(dirname "${BASH_SOURCE[0]}")
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PROJECT_ROOT=$(cd "$SCRIPT_DIR" && git rev-parse --show-toplevel)
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cdself() {
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cd "$SCRIPT_DIR" || error "Could not change directory to '$SCRIPT_DIR'"
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}
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cdroot() {
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cd "$PROJECT_ROOT" || error "Could not change directory to '$PROJECT_ROOT'"
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}
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# Taken from https://stackoverflow.com/a/3915420 (CC-BY-SA 4.0)
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# Fails if the directory doesn't exist.
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realpath() {
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dir="$(dirname "$1")"
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base="$(basename "$1")"
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echo "$(
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cd "$dir" || error "Could not change directory to '$dir'"
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pwd -P
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)"/"$base"
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}
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error() {
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echo "ERROR: $*" 1>&2
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exit 1
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}

‎scripts/version.sh

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#!/usr/bin/env bash
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# This script generates the version string used by Coder, including for dev
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# versions. Note: the version returned by this script will NOT include the "v"
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# prefix that is included in the Git tag.
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set -euo pipefail
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# shellcheck source=lib.sh
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source "$(dirname "${BASH_SOURCE[0]}")/lib.sh"
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cdroot
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# $current will equal $last_tag if we're currently checked out on the tag's
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# commit.
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last_tag="$(git describe --tags --abbrev=0)"
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current="$(git describe --always)"
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version="$last_tag"
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# If the HEAD has extra commits since the last tag then we are in a dev version.
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#
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# Dev versions are denoted by the "+dev." suffix with a trailing commit short
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# SHA.
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if [[ "$last_tag" != "$current" ]]; then
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if [[ "${CODER_NO_DEV_VERSION:-}" != "" ]]; then
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error "version.sh attemped to generate a dev version string when CODER_NO_DEV_VERSION was set"
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fi
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version+="+dev.$(git rev-parse --short HEAD)"
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fi
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# Remove the "v" prefix.
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echo -n "${version#v}"

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