templatefile/cmd/bootstraper/main.go

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2022-06-15 17:29:45 +02:00
package main
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strconv"
"forge.cadoles.com/pcaseiro/templatefile/pkg/templater"
"forge.cadoles.com/pcaseiro/templatefile/pkg/utils"
"github.com/alexflint/go-arg"
"github.com/zclconf/go-cty/cty"
ctyjson "github.com/zclconf/go-cty/cty/json"
)
func main() {
var args struct {
ConfigDirectory string `arg:"-c,--config-dir,env:CONFIG_DIR" help:"Configuration values directory path" default:"./data/config"`
TemplateDirectory string `arg:"-t,--template-dir,env:TEMPLATE_DIR" help:"Template directory path" default:"./data/templates"`
}
arg.MustParse(&args)
files, err := ioutil.ReadDir(args.ConfigDirectory)
if err != nil {
panic(err)
}
for _, file := range files {
var varsVal cty.Value
fname := fmt.Sprintf("%s/%s", args.ConfigDirectory, file.Name())
flContent, err := os.ReadFile(fname)
if err != nil {
panic(err)
}
ctyType, err := ctyjson.ImpliedType(flContent)
if err != nil {
panic(err)
/* Maybe one day
cexpr, diags := hclsyntax.ParseExpression(config, "", hcl.Pos{Line: 0, Column: 1})
if diags.HasErrors() {
panic(diags.Error())
}
varsVal, diags = cexpr.Value(&hcl.EvalContext{})
fmt.Println(cexpr.Variables())
checkDiags(diags)
*/
} else {
varsVal, err = ctyjson.Unmarshal(flContent, ctyType)
utils.CheckErr(err)
}
cnfVals := varsVal.AsValueMap()
config := cnfVals["Config"].AsValueMap()
fls := config["ConfigFiles"].AsValueSlice()
for _, fl := range fls {
data := fl.AsValueMap()
dest := filepath.Join("/tmp/test", data["destination"].AsString())
source := filepath.Join(args.TemplateDirectory, data["source"].AsString())
mod := data["mod"].AsString()
intMod, err := strconv.Atoi(mod)
if err != nil {
panic(err)
}
fmt.Printf("Processing %s\n", source)
fileExtension := filepath.Ext(source)
if fileExtension == ".hcl" {
res := templater.ProcessHCLTemplate(source, flContent)
dirname := filepath.Dir(dest)
err = os.MkdirAll(dirname, os.FileMode(int(0700)))
if err != nil {
panic(err)
}
err = os.WriteFile(dest, []byte(res), os.FileMode(intMod))
if err != nil {
panic(err)
}
}
}
}
}