/
helpers.go
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/
helpers.go
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// Copyright 2020 Fugue, Inc.
//
// 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
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cmd
import (
"bytes"
"fmt"
"os"
"os/exec"
"path/filepath"
"strings"
"github.com/fugue/zim/project"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
func fatal(err error) {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}
func getRepository(dir string) (string, error) {
if dir == "" {
dir = "."
}
return repoRoot(dir)
}
func gitRoot(dir string) (string, error) {
absDir, err := filepath.Abs(dir)
if err != nil {
return "", err
}
return getRepository(absDir)
}
func getProject(dir string) (*project.Project, error) {
absDir, err := filepath.Abs(dir)
if err != nil {
return nil, err
}
if repo, err := getRepository(absDir); err == nil {
absDir = repo
}
return project.New(absDir)
}
type zimOptions struct {
Directory string
URL string
Region string
Cache string
UseDocker bool
Kinds []string
Components []string
Rules []string
Debug bool
OutputMode string
Jobs int
CacheMode string
Token string
Platform string
CachePath string
}
func getZimOptions(cmd *cobra.Command, args []string) (zimOptions, error) {
opts := zimOptions{
Directory: viper.GetString("dir"),
URL: viper.GetString("url"),
Region: viper.GetString("region"),
Cache: viper.GetString("cache"),
Kinds: viper.GetStringSlice("kinds"),
Components: viper.GetStringSlice("components"),
Rules: viper.GetStringSlice("rules"),
UseDocker: viper.GetBool("docker"),
Debug: viper.GetBool("debug"),
OutputMode: viper.GetString("output"),
Jobs: viper.GetInt("jobs"),
CacheMode: viper.GetString("cache"),
Token: viper.GetString("token"),
Platform: viper.GetString("platform"),
CachePath: viper.GetString("cache-path"),
}
if opts.CachePath == "" {
opts.CachePath = LocalCacheDirectory()
}
absCachePath, err := filepath.Abs(opts.CachePath)
if err != nil {
return zimOptions{}, fmt.Errorf("unable to make cache path absolute: %w", err)
}
opts.CachePath = absCachePath
// Strip paths to components if provided, e.g. src/foo -> foo
for i, c := range opts.Components {
opts.Components[i] = filepath.Base(c)
}
// Rules can be specified by arguments or options for run
if cmd.Name() == "run" && len(opts.Rules) == 0 && len(args) > 0 {
opts.Rules = args
}
return opts, nil
}
// LocalCacheDirectory returns the directory in the local filesystem
// to be used for caching
func LocalCacheDirectory() string {
value := os.Getenv("XDG_CACHE_HOME")
if value != "" {
return filepath.Join(value, "zim")
}
home, err := os.UserHomeDir()
if err != nil {
panic(err)
}
return filepath.Join(home, ".cache", "zim")
}
// repoRoot returns the root directory of the Git repository, given any
// path within the repository
func repoRoot(dir string) (string, error) {
var b bytes.Buffer
args := []string{"rev-parse", "--git-dir"}
command := exec.Command("git", args...)
command.Dir = dir
command.Stdout = &b
command.Stderr = &b
if err := command.Run(); err != nil {
return "", fmt.Errorf("failed to run git rev-parse: %s", err)
}
output := strings.TrimSpace(b.String())
if output == ".git" {
return dir, nil
}
return filepath.Dir(output), nil
}