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build: regenerate CREDITS from the linked module set and guard it in CI
The shipped CREDITS predated the fork's dependency work: 38 of the modules in the current go.mod, among them lestrrat-go/jwx, go-tpm, go-spiffe and the charmbracelet family, had no entry at all, while entries lingered for modules no longer in the build. An attribution file that silently drifts from go.mod is worse than none, so it is now generated, not curated. buildscripts/gen-credits.sh (make credits) rebuilds the file from the licenses of every module go list -deps reports for the main package -- the set actually linked into the silo binary, so test-only and tool dependencies stay out. Entries keep the established name / URL / license-text layout. New over the old file: - Modules replaced in go.mod are annotated with the repository that actually serves them, so the pgsty/silo-console, pgsty/mc and pgsty/silo-pkg forks are named next to their upstream import paths. - Bundled NOTICE files are reproduced after the license text, which Apache License 2.0 section 4(d) requires when redistributing; 23 modules carry one. - minio/colorjson, minio/csvparser and minio/filepath publish no license file at all; they repackage Go standard library code and their sources carry the Go Authors' BSD-style header, so the Go project license is reproduced for them with a note saying why. - The Go license text itself comes from the pinned golang.org/x/sys module rather than GOROOT, because Homebrew's Go omits GOROOT/LICENSE and the module copy is version-locked. check-gen now runs the generator and fails on a CREDITS diff, the same treatment go.mod and go.sum already get, so dependency changes cannot leave stale attributions behind. Output is deterministic: two runs are byte-identical, and LC_ALL=C sorting plus version-pinned inputs keep it that way across machines. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Signed-off-by: Feng Ruohang <rh@vonng.com>
This commit is contained in:
Feng Ruohang
Executable
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#!/usr/bin/env bash
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set -euo pipefail
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# Regenerates CREDITS from the license text of every Go module linked into the
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# silo binary. The module set is what `go list -deps` reports for the main
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# package, so test-only and tool dependencies stay out: CREDITS documents what
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# a shipped binary actually contains. check-gen runs this and fails on a diff,
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# which keeps CREDITS from drifting when go.mod changes.
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script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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repo_dir="$(cd "${script_dir}/.." && pwd)"
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cd "${repo_dir}"
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out_file="${1:-${repo_dir}/CREDITS}"
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tmp_file="${out_file}.tmp"
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trap 'rm -f "${tmp_file}"' EXIT
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rule_dash='----------------------------------------------------------------'
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rule_equal='================================================================'
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# These modules repackage Go standard library code and publish no license
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# file; their source files carry the Go Authors' BSD-style header pointing at
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# the Go project license, so that text is reproduced for them.
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stdlib_derived='github.com/minio/colorjson github.com/minio/csvparser github.com/minio/filepath'
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is_stdlib_derived() {
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case " ${stdlib_derived} " in
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*" $1 "*) return 0 ;;
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*) return 1 ;;
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esac
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}
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# Command substitution strips trailing newlines; printf adds exactly one back,
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# so every entry ends the same way regardless of how the license file ends.
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emit_text() {
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printf '%s\n' "$(cat "$1")"
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}
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# The module cache must hold every dependency before .Dir can resolve.
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go mod download
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# The Go project license text is taken from the pinned golang.org/x/sys module
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# rather than GOROOT: Homebrew's Go does not ship GOROOT/LICENSE, and the
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# module copy is version-locked by go.mod, so the output cannot vary with the
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# machine's toolchain packaging.
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go_license="$(go list -m -f '{{.Dir}}' golang.org/x/sys)/LICENSE"
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if [ ! -f "${go_license}" ]; then
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echo "Missing Go license text: ${go_license}" >&2
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exit 1
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fi
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{
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printf '%s\n' \
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'Silo bundles third-party software under the licenses reproduced below.' \
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'Generated by buildscripts/gen-credits.sh (make credits) from the Go' \
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'modules linked into the silo binary. Do not edit by hand.' \
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'' \
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"${rule_equal}" \
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''
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printf '%s\n%s\n%s\n' 'Go (the standard library)' 'https://golang.org/' "${rule_dash}"
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emit_text "${go_license}"
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printf '\n%s\n\n' "${rule_equal}"
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go list -deps -f '{{if and (not .Standard) .Module}}{{.Module.Path}}{{end}}' . \
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| LC_ALL=C sort -u \
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| grep -vx 'github.com/minio/minio' \
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| xargs go list -m -f '{{.Path}}|{{with .Replace}}{{.Path}}{{end}}|{{.Dir}}' \
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| while IFS='|' read -r path replacement dir; do
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if [ -z "${dir}" ] || [ ! -d "${dir}" ]; then
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echo "Module cache directory missing for ${path}" >&2
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exit 1
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fi
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name="${path}"
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url="https://${path}"
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# A same-path replace only pins a version; the annotation is for
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# dependencies actually served from a different repository.
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if [ -n "${replacement}" ] && [ "${replacement}" != "${path}" ]; then
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name="${path} (replaced by ${replacement})"
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url="https://${replacement}"
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fi
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printf '%s\n%s\n%s\n' "${name}" "${url}" "${rule_dash}"
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if is_stdlib_derived "${path}"; then
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printf '%s\n%s\n\n' \
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'This module repackages Go standard library code and publishes no' \
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'license file; the Go project license below applies per its file headers.'
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emit_text "${go_license}"
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else
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license_file=''
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for candidate in LICENSE LICENSE.txt LICENSE.md COPYING COPYING.txt LICENCE UNLICENSE; do
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if [ -f "${dir}/${candidate}" ]; then
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license_file="${dir}/${candidate}"
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break
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fi
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done
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if [ -z "${license_file}" ]; then
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echo "No license file found for ${path} in ${dir}" >&2
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exit 1
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fi
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emit_text "${license_file}"
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fi
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# Apache License 2.0 section 4(d) requires redistributing the NOTICE
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# file contents alongside the licensed work.
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for notice in NOTICE NOTICE.txt; do
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if [ -f "${dir}/${notice}" ]; then
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printf '\n%s\n\n' 'Bundled NOTICE file:'
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emit_text "${dir}/${notice}"
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break
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fi
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done
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printf '\n%s\n\n' "${rule_equal}"
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done
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} > "${tmp_file}"
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mv "${tmp_file}" "${out_file}"
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