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main.go
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main.go
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package main
import (
"errors"
"github.com/drone/envsubst"
"github.com/laontme/envium/internal/pkg/env"
"github.com/urfave/cli/v2"
"io/fs"
"log"
"os"
"path/filepath"
"strings"
)
var app *cli.App
var authors = []*cli.Author{
{Name: "Stanislav Smirnov", Email: "stanislav@laont.me"},
}
var version = "0.3.0"
func init() {
log.SetPrefix("envium: ")
log.SetFlags(0)
app = cli.NewApp()
app.Name = "envium"
app.Usage = "Compile files with variables"
app.Authors = authors
app.Copyright = "Copyright (c) 2022 Stanislav Smirnov"
app.Version = version
app.HideHelpCommand = true
app.Flags = []cli.Flag{
&cli.StringFlag{
Name: "input",
Required: true,
Aliases: []string{"i"},
Usage: "path to input directory",
},
&cli.StringFlag{
Name: "output",
Required: true,
Aliases: []string{"o"},
Usage: "path to output directory",
},
&cli.StringSliceFlag{
Name: "vars",
Required: false,
Usage: "variables",
},
}
app.Action = actionCompile
}
func main() {
err := app.Run(os.Args)
if err != nil {
log.Fatal(err)
}
}
func actionCompile(c *cli.Context) error {
var env2 map[string]string
var err error
if c.IsSet("vars") {
env2, err = env.Parse(c.StringSlice("vars"))
if err != nil {
log.Fatal(err)
}
} else {
env2, err = env.Parse(os.Environ())
if err != nil {
log.Fatal(err)
}
}
inputPath := c.String("input")
outputPath := c.String("output")
// Check if input is not directory
fiInput, err := os.Stat(inputPath)
if err != nil {
log.Fatal(err)
}
if !fiInput.IsDir() {
return errors.New("input is not directory")
}
// Check if output is not directory
fiOutput, err := os.Stat(outputPath)
if err != nil {
log.Fatal(err)
}
if !fiOutput.IsDir() {
return errors.New("output is not directory")
}
filepath.WalkDir(inputPath, func(path string, d fs.DirEntry, err error) error {
fi, err := os.Stat(path)
if err != nil {
log.Fatal(err)
}
// Skip if path is directory
if fi.IsDir() {
return nil
}
input := path
output := strings.Replace(filepath.Clean(path), filepath.Clean(inputPath), filepath.Clean(outputPath), 1)
file, err := os.ReadFile(input)
if err != nil {
return err
}
compiled, _ := envsubst.Eval(string(file), func(s string) string {
return env2[s]
})
os.MkdirAll(filepath.Dir(output), 0777)
err = os.WriteFile(output, []byte(compiled), fi.Mode())
if err != nil {
return err
}
return nil
})
return nil
}