forked from cloudfoundry-incubator/spiff
/
spiff.go
145 lines (117 loc) · 2.98 KB
/
spiff.go
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package main
import (
"fmt"
"io/ioutil"
"log"
"os"
"strings"
"github.com/codegangsta/cli"
"github.com/cloudfoundry-incubator/candiedyaml"
"github.com/cloudfoundry-incubator/spiff/compare"
"github.com/cloudfoundry-incubator/spiff/flow"
"github.com/cloudfoundry-incubator/spiff/yaml"
)
func main() {
app := cli.NewApp()
app.Name = "spiff"
app.Usage = "BOSH deployment manifest toolkit"
app.Version = "1.0.2"
app.Commands = []cli.Command{
{
Name: "merge",
ShortName: "m",
Usage: "merge stub files into a manifest template",
Action: func(c *cli.Context) {
if len(c.Args()) < 1 {
cli.ShowCommandHelp(c, "merge")
os.Exit(1)
}
merge(c.Args()[0], c.Args()[1:])
},
},
{
Name: "diff",
ShortName: "d",
Usage: "structurally compare two YAML files",
Action: func(c *cli.Context) {
if len(c.Args()) < 2 {
cli.ShowCommandHelp(c, "diff")
os.Exit(1)
}
diff(c.Args()[0], c.Args()[1])
},
},
}
app.Run(os.Args)
}
func merge(templateFilePath string, stubFilePaths []string) {
templateFile, err := ioutil.ReadFile(templateFilePath)
if err != nil {
log.Fatalln("error reading template:", err)
}
templateYAML, err := yaml.Parse(templateFilePath, templateFile)
if err != nil {
log.Fatalln("error parsing template:", err)
}
stubs := []yaml.Node{}
for _, stubFilePath := range stubFilePaths {
stubFile, err := ioutil.ReadFile(stubFilePath)
if err != nil {
log.Fatalln("error reading stub:", err)
}
stubYAML, err := yaml.Parse(stubFilePath, stubFile)
if err != nil {
log.Fatalln("error parsing stub:", err)
}
stubs = append(stubs, stubYAML)
}
flowed, err := flow.Cascade(templateYAML, stubs...)
if err != nil {
log.Fatalln("error generating manifest:", err)
}
yaml, err := candiedyaml.Marshal(flowed)
if err != nil {
log.Fatalln("error marshalling manifest:", err)
}
fmt.Println(string(yaml))
}
func diff(aFilePath, bFilePath string) {
aFile, err := ioutil.ReadFile(aFilePath)
if err != nil {
log.Fatalln("error reading a:", err)
}
aYAML, err := yaml.Parse(aFilePath, aFile)
if err != nil {
log.Fatalln("error parsing a:", err)
}
bFile, err := ioutil.ReadFile(bFilePath)
if err != nil {
log.Fatalln("error reading b:", err)
}
bYAML, err := yaml.Parse(bFilePath, bFile)
if err != nil {
log.Fatalln("error parsing b:", err)
}
diffs := compare.Compare(aYAML, bYAML)
if len(diffs) == 0 {
fmt.Println("no differences!")
return
}
for _, diff := range diffs {
fmt.Println("Difference in", strings.Join(diff.Path, "."))
if diff.A != nil {
ayaml, err := candiedyaml.Marshal(diff.A)
if err != nil {
panic(err)
}
fmt.Printf(" %s has:\n \x1b[31m%s\x1b[0m\n", aFilePath, strings.Replace(string(ayaml), "\n", "\n ", -1))
}
if diff.B != nil {
byaml, err := candiedyaml.Marshal(diff.B)
if err != nil {
panic(err)
}
fmt.Printf(" %s has:\n \x1b[32m%s\x1b[0m\n", bFilePath, strings.Replace(string(byaml), "\n", "\n ", -1))
}
}
}