mirror of https://github.com/linka-cloud/d2vm.git
115 lines
2.8 KiB
Go
115 lines
2.8 KiB
Go
// Copyright 2022 Linka Cloud All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package qemu_img
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import (
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"context"
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"encoding/json"
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"fmt"
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"os/exec"
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"path/filepath"
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"go.linka.cloud/d2vm/pkg/docker"
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exec2 "go.linka.cloud/d2vm/pkg/exec"
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)
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var (
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DockerImageName string
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DockerImageVersion string
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)
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type ImgInfo struct {
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VirtualSize int `json:"virtual-size"`
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Filename string `json:"filename"`
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Format string `json:"format"`
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ActualSize int `json:"actual-size"`
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DirtyFlag bool `json:"dirty-flag"`
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}
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func Info(ctx context.Context, in string) (*ImgInfo, error) {
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var (
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o []byte
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err error
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)
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if path, _ := exec.LookPath("qemu-img"); path == "" {
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inAbs, err := filepath.Abs(in)
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if err != nil {
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return nil, fmt.Errorf("failed to get absolute path for %q: %v", path, err)
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}
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inMount := filepath.Dir(inAbs)
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in := filepath.Join("/in", filepath.Base(inAbs))
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o, err = exec2.CommandContext(
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ctx,
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"docker",
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"run",
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"--rm",
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"-v",
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inMount+":/in",
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"--entrypoint",
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"qemu-img",
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fmt.Sprintf("%s:%s", DockerImageName, DockerImageVersion),
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"info",
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in,
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"--output",
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"json",
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).CombinedOutput()
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} else {
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o, err = exec2.CommandContext(ctx, "qemu-img", "info", in, "--output", "json").CombinedOutput()
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}
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if err != nil {
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return nil, fmt.Errorf("%v: %s", err, string(o))
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}
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var i ImgInfo
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if err := json.Unmarshal(o, &i); err != nil {
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return nil, err
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}
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return &i, nil
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}
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func Convert(ctx context.Context, format, in, out string) error {
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if path, _ := exec.LookPath("qemu-img"); path != "" {
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return exec2.Run(ctx, "qemu-img", "convert", "-O", format, in, out)
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}
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inAbs, err := filepath.Abs(in)
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if err != nil {
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return fmt.Errorf("failed to get absolute path for %q: %v", in, err)
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}
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inMount := filepath.Dir(inAbs)
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in = filepath.Join("/in", filepath.Base(inAbs))
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outAbs, err := filepath.Abs(out)
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if err != nil {
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return fmt.Errorf("failed to get absolute path for %q: %v", out, err)
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}
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outMount := filepath.Dir(outAbs)
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out = filepath.Join("/out", filepath.Base(outAbs))
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return docker.RunAndRemove(
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ctx,
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"-v",
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fmt.Sprintf("%s:/in", inMount),
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"-v",
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fmt.Sprintf("%s:/out", outMount),
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"--entrypoint",
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"qemu-img",
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fmt.Sprintf("%s:%s", DockerImageName, DockerImageVersion),
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"convert",
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"-O",
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format,
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in,
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out,
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)
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}
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