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#!/bin/sh
set -e
# Log and execute provided args.
log_exec() { echo "$ ${*}"; "$@"; }
# Grab environment variables and set defaults + requirements.
GO_BUILDTAGS="${GO_BUILDTAGS-} netgo osusergo static_build timetzdata nomsgpack stdlibjson"
GO_LDFLAGS="${GO_LDFLAGS-} -s -w -extldflags '-static' -X 'main.Version=${VERSION:-$(git describe --tags --abbrev=0)}'"
GO_GCFLAGS=${GO_GCFLAGS-}
# Maintain old $DEBUG compat.
[ ! -z "$DEBUG" ] && \
GO_BUILDTAGS="${GO_BUILDTAGS} debugenv"
# Available Go build tags, with explanation, followed by benefits of enabling it:
# - timetzdata: embed timezone database inside binary (allow setting local time inside Docker containers, at cost of 450KB)
# - nomsgpack: removes msgpack encoding from gin (which we don't use anyway) (reduced binary size)
# - stdlibjson: sets encoding/json instead of goccy/go-json for minio (reduced binary size)
# - nootel: disables compiling-in otel support (reduced binary size)
# - nosqlite: disables compiling-in sqlite support (reduced binary size)
# - nopostgres: disables compiling-in postgres support (reduced binary size)
# - noerrcaller: disables caller function prefix in errors (slightly better performance, at cost of err readability)
# - debug: enables /debug/pprof endpoint (adds debug, at performance cost)
# - debugenv: enables /debug/pprof endpoint if DEBUG=1 env during runtime (adds debug, at performance cost)
# - moderncsqlite3: reverts to using the C-to-Go transpiled SQLite driver (disables the WASM-based SQLite driver)
#
# - nowasmffmpeg: [UNSUPPORTED] removes WebAssembly ffmpeg, ffprobe, relying instead on host-installed ffmpeg, ffprobe binaries.
# - nowasm: [UNSUPPORTED] removes all WebAssembly from build. It is the same as passing "nowasmffmpeg, moderncsqlite3".
log_exec env CGO_ENABLED=0 go build -trimpath -v \
-tags "${GO_BUILDTAGS}" \
-ldflags="${GO_LDFLAGS}" \
-gcflags="${GO_GCFLAGS}" \
./cmd/gotosocial
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