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|
package main
import (
"fmt"
"io/ioutil"
"log"
"os"
jsonpatch "github.com/evanphx/json-patch"
flags "github.com/jessevdk/go-flags"
)
type opts struct {
PatchFilePaths []FileFlag `long:"patch-file" short:"p" value-name:"PATH" description:"Path to file with one or more operations"`
}
func main() {
var o opts
_, err := flags.Parse(&o)
if err != nil {
log.Fatalf("error: %s\n", err)
}
patches := make([]jsonpatch.Patch, len(o.PatchFilePaths))
for i, patchFilePath := range o.PatchFilePaths {
var bs []byte
bs, err = ioutil.ReadFile(patchFilePath.Path())
if err != nil {
log.Fatalf("error reading patch file: %s", err)
}
var patch jsonpatch.Patch
patch, err = jsonpatch.DecodePatch(bs)
if err != nil {
log.Fatalf("error decoding patch file: %s", err)
}
patches[i] = patch
}
doc, err := ioutil.ReadAll(os.Stdin)
if err != nil {
log.Fatalf("error reading from stdin: %s", err)
}
mdoc := doc
for _, patch := range patches {
mdoc, err = patch.Apply(mdoc)
if err != nil {
log.Fatalf("error applying patch: %s", err)
}
}
fmt.Printf("%s", mdoc)
}
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