actions: run tests only if go files or templates changed

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

.github/workflows/ci.yaml

@@ -43,7 +43,7 @@ jobs:
           ${{ runner.os }}-tests-
 
     - name: Run tests
-      run: make tests
+      run: git --no-pager diff --exit-code HEAD~1 HEAD **/**.go templates/ || make tests
 
   docs-up-to-date:
     name: Docs up to date

.github/workflows/docs.yaml

@@ -1,9 +1,7 @@
 name: Docs
 on:
   push:
-    branches:
-    - docs
-    - main
+    tags: [ "v*" ]
 jobs:
   deploy:
     runs-on: ubuntu-latest

.gitignore

@@ -13,3 +13,5 @@ images
 .goreleaser.yaml
 docs/build
 docs-src
+/completions
+/cmd/d2vm/run/sparsecat-linux-amd64

.goreleaser.yaml

@@ -15,6 +15,8 @@ project_name: d2vm
 before:
   hooks:
   - go mod tidy
+  - go generate ./...
+  - make completions
 builds:
 - main: ./cmd/d2vm
   env:
@@ -37,6 +39,35 @@ snapshot:
   name_template: "{{ .Env.VERSION }}"
 release:
   prerelease: auto
+  extra_files:
+  - glob: LICENCE
+  - glob: pgp.pub
+archives:
+- name_template: '{{ .ProjectName }}_{{ .Env.VERSION }}_{{ .Os }}_{{ .Arch }}{{ with .Arm }}v{{ . }}{{ end }}{{ with .Mips }}_{{ . }}{{ end }}{{ if not (eq .Amd64 "v1") }}{{ .Amd64 }}{{ end }}'
+  files:
+  - LICENCE
+  - README.md
+  - completions/*
+brews:
+- name: d2vm
+  tap:
+    owner: linka-cloud
+    name: homebrew-tap
+  folder: Formula
+  homepage: https://github.com/linka-cloud/d2vm
+  description: Build Virtual Machine Image from Dockerfile or Docker image
+  license: Apache License 2.0
+  test: |
+    system "#{bin}/d2vm --version"
+  dependencies:
+  - name: go
+    type: optional
+  - name: git
+  install: |-
+    bin.install "d2vm"
+    bash_completion.install "completions/d2vm.bash" => "d2vm"
+    zsh_completion.install "completions/d2vm.zsh" => "_d2vm"
+    fish_completion.install "completions/d2vm.fish"
 changelog:
   sort: asc
   filters:

Makefile

@@ -16,7 +16,7 @@ MODULE = go.linka.cloud/d2vm
 
 REPOSITORY = linkacloud
 
-TAG = $(shell git describe --tags --exact-match 2> /dev/null)
+TAG = $(shell git diff --quiet && git describe --tags --exact-match 2> /dev/null)
 VERSION_SUFFIX = $(shell git diff --quiet || echo "-dev")
 VERSION = $(shell git describe --tags --exact-match 2> /dev/null || echo "`git describe --tags $$(git rev-list --tags --max-count=1) 2> /dev/null || echo v0.0.0`-`git rev-parse --short HEAD`")$(VERSION_SUFFIX)
 show-version:
@@ -78,6 +78,9 @@ vet:
 
 build-dev: docker-build .build
 
+install: docker-build
+	@go install -ldflags "-s -w -X '$(MODULE).Version=$(VERSION)' -X '$(MODULE).BuildDate=$(shell date)'" ./cmd/d2vm
+
 .build:
 	@go generate ./...
 	@go build -o d2vm -ldflags "-s -w -X '$(MODULE).Version=$(VERSION)' -X '$(MODULE).BuildDate=$(shell date)'" ./cmd/d2vm
@@ -98,15 +101,23 @@ build: bin
 release: bin
 	@VERSION=$(VERSION) IMAGE=$(DOCKER_IMAGE) goreleaser release --rm-dist --parallelism 8
 
+.PHONY: completions
+completions: .build
+	@rm -rf completions
+	@mkdir -p completions
+	@for shell in bash zsh fish powershell; do \
+		./d2vm completion $$shell > completions/d2vm.$$shell; \
+	done
+
 .PHONY: examples
 examples: build-dev
 	@mkdir -p examples/build
 	@for f in $$(find examples -type f -name '*Dockerfile' -maxdepth 1); do \
   		echo "Building $$f"; \
-  		./d2vm build -o examples/build/$$(basename $$f|cut -d'.' -f1).qcow2 -f $$f examples; \
+  		./d2vm build -o examples/build/$$(basename $$f|cut -d'.' -f1).qcow2 -p root -f $$f examples --force; \
 	  done
 	@echo "Building examples/full/Dockerfile"
-	@./d2vm build -o examples/build/full.qcow2 --build-arg=USER=adphi --build-arg=PASSWORD=adphi examples/full
+	@./d2vm build -o examples/build/full.qcow2 --build-arg=USER=adphi --build-arg=PASSWORD=adphi examples/full --force
 
 cli-docs: .build
 	@rm -rf $(CLI_REFERENCE_PATH)

README.md

@@ -43,7 +43,15 @@ Obviously, **Distroless** images are not supported.
 
 ### Install from release
 
-Download the latest release for your platform from the [release page](https://github.com/linka-cloud/d2vm/releases/latest)
+Download the latest release for your platform from the [release page](https://github.com/linka-cloud/d2vm/releases/latest).
+
+Extract the tarball:
+
+```bash
+tar -xvzf <RELEASE-TARBALL-NAME>.tar.gz
+```
+
+Move the extracted *d2vm* binary to somewhere in your `$PATH` (`/usr/local/bin` for most users).
 
 ### Install from source
 
@@ -56,9 +64,34 @@ git clone https://github.com/linka-cloud/d2vm && cd d2vm
 Install using the *make*, *docker* and the Go tool chain:
 
 ```bash
-make build-dev && sudo cp d2vm /usr/local/bin/
+make install
 ```
 
+The *d2vm* binary is installed in the `$GOBIN` directory.
+
+```bash
+which d2vm
+
+/go/bin/d2vm
+```
+
+### Generate shell completion
+
+The *d2vm* program supports shell completion for *bash*, *zsh* and *fish*.
+
+It can be enabled by running the following command:
+
+```bash
+source <(d2vm completion $(basename $SHELL))
+```
+
+Or you can install the completion file in the shell completion directory by following the instructions:
+
+```bash
+d2vm completion $(basename $SHELL) --help
+```
+
+
 ### Converting an existing Docker Image to VM image:
 
 ```bash
@@ -206,8 +239,6 @@ RUN apt update && apt install -y openssh-server && \
 
 ```
 
-When building the vm image, *d2vm* will create a root password, so there is no need to configure it now.
-
 Build the vm image:
 
 The *build* command take most of its flags and arguments from the *docker build* command.

builder.go

@@ -105,6 +105,11 @@ func sysconfig(osRelease OSRelease) (string, error) {
 	}
 }
 
+type Builder interface {
+	Build(ctx context.Context) (err error)
+	Close() error
+}
+
 type builder struct {
 	osRelease OSRelease
 
@@ -125,7 +130,7 @@ type builder struct {
 	cmdLineExtra string
 }
 
-func NewBuilder(ctx context.Context, workdir, imgTag, disk string, size int64, osRelease OSRelease, format string, cmdLineExtra string) (*builder, error) {
+func NewBuilder(ctx context.Context, workdir, imgTag, disk string, size int64, osRelease OSRelease, format string, cmdLineExtra string) (Builder, error) {
 	if err := checkDependencies(); err != nil {
 		return nil, err
 	}

cmd/d2vm/build.go

@@ -117,7 +117,7 @@ func init() {
 	buildCmd.Flags().StringArrayVar(&buildArgs, "build-arg", nil, "Set build-time variables")
 
 	buildCmd.Flags().StringVarP(&output, "output", "o", output, "The output image, the extension determine the image format, raw will be used if none. Supported formats: "+strings.Join(d2vm.OutputFormats(), " "))
-	buildCmd.Flags().StringVarP(&password, "password", "p", "root", "Root user password")
+	buildCmd.Flags().StringVarP(&password, "password", "p", "", "Optional root user password")
 	buildCmd.Flags().StringVarP(&size, "size", "s", "10G", "The output image size")
 	buildCmd.Flags().BoolVar(&force, "force", false, "Override output image")
 	buildCmd.Flags().StringVar(&cmdLineExtra, "append-to-cmdline", "", "Extra kernel cmdline arguments to append to the generated one")

cmd/d2vm/convert.go

@@ -111,7 +111,7 @@ func parseSize(s string) (int64, error) {
 func init() {
 	convertCmd.Flags().BoolVar(&pull, "pull", false, "Always pull docker image")
 	convertCmd.Flags().StringVarP(&output, "output", "o", output, "The output image, the extension determine the image format, raw will be used if none. Supported formats: "+strings.Join(d2vm.OutputFormats(), " "))
-	convertCmd.Flags().StringVarP(&password, "password", "p", "root", "The Root user password")
+	convertCmd.Flags().StringVarP(&password, "password", "p", "", "Optional root user password")
 	convertCmd.Flags().StringVarP(&size, "size", "s", "10G", "The output image size")
 	convertCmd.Flags().BoolVarP(&force, "force", "f", false, "Override output qcow2 image")
 	convertCmd.Flags().StringVar(&cmdLineExtra, "append-to-cmdline", "", "Extra kernel cmdline arguments to append to the generated one")

cmd/d2vm/main.go

@@ -34,7 +34,7 @@ import (
 var (
 	output     = "disk0.qcow2"
 	size       = "1G"
-	password   = "root"
+	password   = ""
 	force      = false
 	verbose    = false
 	timeFormat = ""
@@ -56,6 +56,12 @@ var (
 				logrus.SetLevel(logrus.TraceLevel)
 			}
 			exec.SetDebug(verbose)
+
+			// make the zsh completion work when sourced with `source <(d2vm completion zsh)`
+			if cmd.Name() == "zsh" && cmd.Parent() != nil && cmd.Parent().Name() == "completion" {
+				zshHead := fmt.Sprintf("#compdef %[1]s\ncompdef _%[1]s %[1]s\n", cmd.Root().Name())
+				cmd.OutOrStdout().Write([]byte(zshHead))
+			}
 		},
 	}
 )

cmd/d2vm/run/hetzner.go

@@ -243,7 +243,12 @@ func runHetzner(ctx context.Context, imgPath string, stdin io.Reader, stderr io.
 					}
 				}
 			}()
-			cmd := fmt.Sprintf("%s -r -disable-sparse-target -of %s", sparsecatPath, vmBlockPath)
+			var cmd string
+			if runtime.GOOS == "linux" {
+				cmd = fmt.Sprintf("%s -r -disable-sparse-target -of %s", sparsecatPath, vmBlockPath)
+			} else {
+				cmd = fmt.Sprintf("dd of=%s", vmBlockPath)
+			}
 			logrus.Debugf("$ %s", cmd)
 			if b, err := wses.CombinedOutput(cmd); err != nil {
 				return fmt.Errorf("%v: %s", err, string(b))

cmd/d2vm/run/qemu.go

@@ -71,7 +71,7 @@ func init() {
 
 	// Paths and settings for disks
 	flags.Var(&disks, "disk", "Disk config, may be repeated. [file=]path[,size=1G][,format=qcow2]")
-	flags.StringVar(&data, "data", "", "String of metadata to pass to VM; error to specify both -data and -data-file")
+	flags.StringVar(&data, "data", "", "String of metadata to pass to VM")
 
 	// VM configuration
 	flags.StringVar(&accel, "accel", defaultAccel, "Choose acceleration mode. Use 'tcg' to disable it.")
@@ -91,7 +91,7 @@ func init() {
 	// USB devices
 	flags.BoolVar(&usbEnabled, "usb", false, "Enable USB controller")
 
-	flags.Var(&deviceFlags, "device", "Add USB host device(s). Format driver[,prop=value][,...] -- add device, like -device on the qemu command line.")
+	flags.Var(&deviceFlags, "device", "Add USB host device(s). Format driver[,prop=value][,...] -- add device, like --device on the qemu command line.")
 
 }
 

cmd/d2vm/run/vbox.go

@@ -93,7 +93,7 @@ func vbox(ctx context.Context, path string) error {
 	}
 
 	// remove machine in case it already exists
-	cleanup(vboxmanage, name)
+	cleanup(vboxmanage, name, false)
 
 	_, out, err := manage(vboxmanage, "createvm", "--name", name, "--register")
 	if err != nil {
@@ -273,22 +273,26 @@ func vbox(ctx context.Context, path string) error {
 	return <-errs
 }
 
-func cleanup(vboxmanage string, name string) {
-	if _, _, err := manage(vboxmanage, "controlvm", name, "poweroff"); err != nil {
+func cleanup(vboxmanage string, name string, logErrs ...bool) {
+	logErr := true
+	if len(logErrs) > 0 {
+		logErr = logErrs[0]
+	}
+	if _, _, err := manage(vboxmanage, "controlvm", name, "poweroff"); err != nil && logErr {
 		log.Errorf("controlvm poweroff error: %v", err)
 	}
 	_, out, err := manage(vboxmanage, "storageattach", name, "--storagectl", "IDE Controller", "--port", "1", "--device", "0", "--type", "hdd", "--medium", "emptydrive")
-	if err != nil {
+	if err != nil && logErr {
 		log.Errorf("storageattach error: %v\n%s", err, out)
 	}
 	for i := range disks {
 		id := strconv.Itoa(i)
 		_, out, err := manage(vboxmanage, "storageattach", name, "--storagectl", "SATA", "--port", "0", "--device", id, "--type", "hdd", "--medium", "emptydrive")
-		if err != nil {
+		if err != nil && logErr {
 			log.Errorf("storageattach error: %v\n%s", err, out)
 		}
 	}
-	if _, out, err = manage(vboxmanage, "unregistervm", name, "--delete"); err != nil {
+	if _, out, err = manage(vboxmanage, "unregistervm", name, "--delete"); err != nil && logErr {
 		log.Errorf("unregistervm error: %v\n%s", err, out)
 	}
 }

dockerfile.go

@@ -72,9 +72,6 @@ func (d Dockerfile) Render(w io.Writer) error {
 }
 
 func NewDockerfile(release OSRelease, img, password string, networkManager NetworkManager) (Dockerfile, error) {
-	if password == "" {
-		password = "root"
-	}
 	d := Dockerfile{Release: release, Image: img, Password: password, NetworkManager: networkManager}
 	var net NetworkManager
 	switch release.ID {

docs/content/reference/d2vm_build.md

@@ -16,7 +16,7 @@ d2vm build [context directory] [flags]
   -h, --help                       help for build
       --network-manager string     Network manager to use for the image: none, netplan, ifupdown
   -o, --output string              The output image, the extension determine the image format, raw will be used if none. Supported formats: qcow2 qed raw vdi vhd vmdk (default "disk0.qcow2")
-  -p, --password string            Root user password (default "root")
+  -p, --password string            Optional root user password
       --raw                        Just convert the container to virtual machine image without installing anything more
   -s, --size string                The output image size (default "10G")
 ```

docs/content/reference/d2vm_convert.md

@@ -14,7 +14,7 @@ d2vm convert [docker image] [flags]
   -h, --help                       help for convert
       --network-manager string     Network manager to use for the image: none, netplan, ifupdown
   -o, --output string              The output image, the extension determine the image format, raw will be used if none. Supported formats: qcow2 qed raw vdi vhd vmdk (default "disk0.qcow2")
-  -p, --password string            The Root user password (default "root")
+  -p, --password string            Optional root user password
       --pull                       Always pull docker image
       --raw                        Just convert the container to virtual machine image without installing anything more
   -s, --size string                The output image size (default "10G")

docs/content/reference/d2vm_run_qemu.md

@@ -12,9 +12,9 @@ d2vm run qemu [options] [image-path] [flags]
       --accel string            Choose acceleration mode. Use 'tcg' to disable it. (default "hvf:tcg")
       --arch string             Type of architecture to use, e.g. x86_64, aarch64, s390x (default "x86_64")
       --cpus uint               Number of CPUs (default 1)
-      --data string             String of metadata to pass to VM; error to specify both -data and -data-file
+      --data string             String of metadata to pass to VM
       --detached                Set qemu container to run in the background
-      --device multiple-flag    Add USB host device(s). Format driver[,prop=value][,...] -- add device, like -device on the qemu command line. (default A multiple flag is a type of flag that can be repeated any number of times)
+      --device multiple-flag    Add USB host device(s). Format driver[,prop=value][,...] -- add device, like --device on the qemu command line. (default A multiple flag is a type of flag that can be repeated any number of times)
       --disk disk               Disk config, may be repeated. [file=]path[,size=1G][,format=qcow2] (default [])
       --gui                     Set qemu to use video output instead of stdio
   -h, --help                    help for qemu

pgp.pub

@@ -0,0 +1,51 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+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==
+=3bbH
+-----END PGP PUBLIC KEY BLOCK-----

templates/alpine.Dockerfile

@@ -12,7 +12,7 @@ RUN apk update --no-cache && \
 RUN for s in bootmisc hostname hwclock modules networking swap sysctl urandom syslog; do rc-update add $s boot; done
 RUN for s in devfs dmesg hwdrivers mdev; do rc-update add $s sysinit; done
 
-RUN echo "root:{{- if .Password}}{{ .Password}}{{- else}}root{{- end}}" | chpasswd
+{{ if .Password }}RUN echo "root:{{ .Password }}" | chpasswd {{ end }}
 
 {{ if eq .NetworkManager "ifupdown"}}
 RUN apk add --no-cache ifupdown-ng

templates/centos.Dockerfile

@@ -17,4 +17,4 @@ RUN dracut --no-hostonly --regenerate-all --force && \
     ln -s $(find . -name 'vmlinuz-*') vmlinuz && \
     ln -s $(find . -name 'initramfs-*.img') initrd.img
 
-RUN echo "root:{{- if .Password}}{{ .Password}}{{- else}}root{{- end}}" | chpasswd
+{{ if .Password }}RUN echo "root:{{ .Password }}" | chpasswd {{ end }}

templates/debian.Dockerfile

@@ -16,7 +16,7 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
 
 RUN systemctl preset-all
 
-RUN echo "root:{{- if .Password}}{{ .Password}}{{- else}}root{{- end}}" | chpasswd
+{{ if .Password }}RUN echo "root:{{ .Password }}" | chpasswd {{ end }}
 
 {{ if eq .NetworkManager "netplan" }}
 RUN apt install -y netplan.io

templates/ubuntu.Dockerfile

@@ -15,7 +15,7 @@ RUN apt-get update -y && \
 
 RUN systemctl preset-all
 
-RUN echo "root:{{- if .Password}}{{ .Password}}{{- else}}root{{- end}}" | chpasswd
+{{ if .Password }}RUN echo "root:{{ .Password }}" | chpasswd {{ end }}
 
 {{ if eq .NetworkManager "netplan" }}
 RUN apt install -y netplan.io