Makefile: fix lint rules

use errors.Join

.build.yml

@@ -1,19 +0,0 @@
-image: alpine/edge
-packages:
-  - go
-  - git
-  - make
-  - shellcheck
-sources:
-  - https://git.sr.ht/~motiejus/undocker
-tasks:
-  - setup: |
-      go install honnef.co/go/tools/cmd/staticcheck@latest
-  - built-test-lint: |
-      make -C undocker -O -j$(nproc) undocker coverage.html lint
-  - usage: |
-      # like 'grep -q', but prints output too.
-      # | tee /dev/stderr doesn't work on sourcehut workers; permission denied.
-      ./undocker/undocker |& awk 'BEGIN{c=1};/Built with /{c=0};{print};END{exit c}'
-artifacts:
-  - undocker/coverage.html

LICENSE

@@ -1,19 +1,202 @@
-Copyright (c) 2021 Motiejus Jakštys
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
+                                 Apache License
-of this software and associated documentation files (the "Software"), to deal
+                           Version 2.0, January 2004
-in the Software without restriction, including without limitation the rights
+                        http://www.apache.org/licenses/
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be included in all
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-copies or substantial portions of the Software.
 
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+
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-SOFTWARE.
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+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
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+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
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+      names, trademarks, service marks, or product names of the Licensor,
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+
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+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
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+
+   Copyright 2021 Motiejus Jakštys
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
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+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+   limitations under the License.

Makefile

@@ -1,4 +1,4 @@
-SCRIPTS = $(shell awk '/#!\/bin\/(ba)?sh/&&FNR==1{print FILENAME}' $(shell git ls-files))
+SCRIPTS = $(shell awk '/#!\/usr\/bin\/env (ba)?sh/&&FNR==1{print FILENAME}' $(shell git ls-files))
 GODEPS = $(shell git ls-files '*.go' go.mod go.sum)
 
 VSN ?= $(shell git describe --dirty)
@@ -14,7 +14,7 @@ test: coverage.out
 .PHONY: lint
 lint:
 	go vet ./...
-	$(shell go env GOPATH)/bin/staticcheck -f stylish ./...
+	staticcheck -f stylish ./...
 	shellcheck $(SCRIPTS)
 
 .INTERMEDIATE: coverage.out

README.md

@@ -1,11 +1,19 @@
-[![godocs.io](http://godocs.io/git.sr.ht/~motiejus/undocker?status.svg)](http://godocs.io/git.sr.ht/~motiejus/undocker)
+[![godocs.io](http://godocs.io/git.jakstys.lt/motiejus/undocker?status.svg)](http://godocs.io/git.jakstys.lt/motiejus/undocker)
-[![builds.sr.ht status](https://builds.sr.ht/~motiejus/undocker.svg)](https://builds.sr.ht/~motiejus/undocker?)
 
 Undocker
 --------
 
 Converts a Docker image (a bunch of layers) to a flattened "rootfs" tarball.
 
+Project Status
+--------------
+
+The project was announced to be deprecated in the beginning of 2024, but the
+maintainer has an interest in Docker ecosystem again, thus will maintain it
+somewhat starting at mid-2024.
+
+The author has some significant changes in mind, but the timeline is unknown.
+
 Why?
 ----
 
@@ -80,13 +88,6 @@ Similar Projects
 
 * [rootfs_builder](https://github.com/ForAllSecure/rootfs_builder)
 
-Changelog
----------
-
-**v1.0**
-
-* initial release: `rootfs.Flatten` and a simple command-line application.
-
 Contributions
 -------------
 
@@ -106,8 +107,7 @@ rejected.
 Communication
 -------------
 
-Use [~motiejus/undocker@lists.sr.ht](mailto:~motiejus/undocker@lists.sr.ht) for
+Feel free to ping me [directly][motiejus-comms].
-questions or patches. Subscribe [here][4].
 
 LICENSE
 -------
@@ -116,5 +116,5 @@ MIT
 
 [1]: https://www.freedesktop.org/software/systemd/man/systemd.exec.html
 [2]: https://fly.io/blog/docker-without-docker/
-[3]: http://git.sr.ht/~motiejus/undocker
+
-[4]: https://lists.sr.ht/~motiejus/undocker
+[motiejus-comms]: https://jakstys.lt/contact/

go.mod

@@ -1,3 +1,3 @@
-module git.sr.ht/~motiejus/undocker
+module git.jakstys.lt/motiejus/undocker
 
-go 1.16
+go 1.20

main.go

@@ -2,13 +2,14 @@
 package main
 
 import (
+	"errors"
 	"fmt"
 	"io"
 	"os"
 	"path/filepath"
 	"runtime"
 
-	"git.sr.ht/~motiejus/undocker/rootfs"
+	"git.jakstys.lt/motiejus/undocker/rootfs"
 )
 
 var Version = "unknown"
@@ -42,7 +43,7 @@ func main() {
 
 	c := &command{flattener: rootfs.Flatten, Stdout: os.Stdout}
 	if err := c.execute(os.Args[1], os.Args[2]); err != nil {
-		fmt.Printf("Error: %v\n", err)
+		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
 		os.Exit(1)
 	}
 	os.Exit(0)
@@ -59,10 +60,7 @@ func (c *command) execute(infile string, outfile string) (_err error) {
 		return err
 	}
 	defer func() {
-		err := rd.Close()
+		_err = errors.Join(_err, rd.Close())
-		if _err == nil {
-			_err = err
-		}
 	}()
 
 	var out io.Writer
@@ -74,11 +72,10 @@ func (c *command) execute(infile string, outfile string) (_err error) {
 			return fmt.Errorf("create: %w", err)
 		}
 		defer func() {
-			err := outf.Close()
 			if _err != nil {
-				os.Remove(outfile)
+				_err = errors.Join(_err, os.Remove(outfile))
 			} else {
-				_err = err
+				_err = errors.Join(_err, outf.Close())
 			}
 		}()
 		out = outf

release

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -euo pipefail
 
 _err(){ >&2 echo "ERROR: $*"; exit 1; }
@@ -22,4 +22,4 @@ last_tag=$(git tag | tail -1)
     echo
     echo Changelog since "$last_tag":
     git log --pretty=format:"- [%an] %s" "$last_tag"..HEAD
-} | git tag -u motiejus@jakstys.lt -F - "$1"
+} | git tag -F - "$1"

rootfs/rootfs.go

@@ -144,11 +144,7 @@ func Flatten(rd io.ReadSeeker, w io.Writer) (_err error) {
 
 	tw := tar.NewWriter(w)
 	defer func() {
-		// Avoiding use of multierr: if error is present, return
+		_err = errors.Join(_err, tw.Close())
-		// that. Otherwise return whatever `Close` returns.
-		if err := tw.Close(); err != nil && _err == nil {
-			_err = err
-		}
 	}()
 	// iterate through all layers, all files, and write files.
 	for i, no := range layers {

rootfs/rootfs_test.go

@@ -7,7 +7,7 @@ import (
 	"reflect"
 	"testing"
 
-	"git.sr.ht/~motiejus/undocker/rootfs/internal/tartest"
+	"git.jakstys.lt/motiejus/undocker/rootfs/internal/tartest"
 )
 
 type (