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Add diff parameter to show diff of changes

Browse source 
Signed-off-by: Knut Ahlers <knut@ahlers.me>
This commit is contained in:
Knut Ahlers 2019-09-12 08:27:05 +02:00
parent 88792c4bda
commit 5a9be036a1
Signed by: luzifer
GPG key ID: DC2729FDD34BE99E
3 changed files with 79 additions and 0 deletions
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4
go.mod
View file

@ -4,8 +4,12 @@ go 1.13
require (
github.com/Luzifer/rconfig/v2 v2.2.1
github.com/fatih/color v1.7.0
github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
github.com/mattn/go-colorable v0.1.2 // indirect
github.com/mattn/go-isatty v0.0.9 // indirect
github.com/mitchellh/go-homedir v1.1.0
github.com/sergi/go-diff v1.0.0
github.com/sirupsen/logrus v1.4.2
golang.org/x/sys v0.0.0-20190911201528-7ad0cfa0b7b5 // indirect
gopkg.in/validator.v2 v2.0.0-20190827175613-1a84e0480e5b // indirect

14
go.sum
View file

@ -1,22 +1,36 @@
github.com/Luzifer/rconfig v2.2.0+incompatible h1:Kle3+rshPM7LxciOheaR4EfHUzibkDDGws04sefQ5m8=
github.com/Luzifer/rconfig/v2 v2.2.1 h1:zcDdLQlnlzwcBJ8E0WFzOkQE1pCMn3EbX0dFYkeTczg=
github.com/Luzifer/rconfig/v2 v2.2.1/go.mod h1:OKIX0/JRZrPJ/ZXXWklQEFXA6tBfWaljZbW37w+sqBw=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGiHgQ4OO8tzTaLawm8vnODuwDk=
github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
github.com/konsorten/go-windows-terminal-sequences v1.0.2 h1:DB17ag19krx9CFsz4o3enTrPXyIXCl+2iCXH/aMAp9s=
github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
github.com/mattn/go-colorable v0.1.2 h1:/bC9yWikZXAL9uJdulbSfyVNIR3n3trXl+v8+1sx8mU=
github.com/mattn/go-colorable v0.1.2/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
github.com/mattn/go-isatty v0.0.9 h1:d5US/mDsogSGW37IV293h//ZFaeajb69h+EHFsv2xGg=
github.com/mattn/go-isatty v0.0.9/go.mod h1:YNRxwqDuOph6SZLI9vUUz6OYw3QyUt7WiY2yME+cCiQ=
github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/sergi/go-diff v1.0.0 h1:Kpca3qRNrduNnOQeazBd0ysaKrUJiIuISHxogkT9RPQ=
github.com/sergi/go-diff v1.0.0/go.mod h1:0CfEIISq7TuYL3j771MWULgwwjU+GofnZX9QAmXWZgo=
github.com/sirupsen/logrus v1.4.2 h1:SPIRibHv4MatM3XXNO2BJeFLZwZ2LvZgfQ5+UNI2im4=
github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg=
github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/pU5OE2C0WrNTOYK1Uuc=
golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190911201528-7ad0cfa0b7b5 h1:SW/0nsKCUaozCUtZTakri5laocGx/5bkDSSLrFUsa5s=
golang.org/x/sys v0.0.0-20190911201528-7ad0cfa0b7b5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

61
main.go
View file

@ -4,13 +4,16 @@ import (
"bytes"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"regexp"
"strings"
"text/template"
"github.com/fatih/color"
homedir "github.com/mitchellh/go-homedir"
diff "github.com/sergi/go-diff/diffmatchpatch"
log "github.com/sirupsen/logrus"
"github.com/Luzifer/rconfig/v2"
@ -18,6 +21,7 @@ import (
var (
cfg = struct {
Diff bool `flag:"diff" default:"false" description:"Show a diff to existing Dockerfile"`
ExposedPorts []string `flag:"expose,e" default:"" description:"Ports to expose (format '8000' or '8000/tcp')"`
LogLevel string `flag:"log-level" default:"info" description:"Log level (debug, info, warn, error, fatal)"`
TemplateFile string `flag:"template-file" default:"~/.config/gen-dockerfile.tpl" description:"Template to use for generating the docker file"`
@ -89,6 +93,11 @@ func main() {
}
var output io.Writer = os.Stdout
if cfg.Diff {
displayDiff(buf)
output = ioutil.Discard
}
if cfg.Write {
f, err := os.Create("Dockerfile")
if err != nil {
@ -101,6 +110,58 @@ func main() {
fmt.Fprintln(output, strings.TrimSpace(regexp.MustCompile(`\n{3,}`).ReplaceAllString(buf.String(), "\n\n")))
}
func displayDiff(buf *bytes.Buffer) {
var (
lenOldDockerfile int
oldDockerfile []byte
oldName = "/dev/null"
)
if _, err := os.Stat("Dockerfile"); err == nil {
oldDockerfile, err = ioutil.ReadFile("Dockerfile")
if err != nil {
log.WithError(err).Fatal("Could not read existing Dockerfile")
}
lenOldDockerfile = len(bytes.Split(oldDockerfile, []byte{'\n'}))
oldName = "a/Dockerfile"
}
differ := diff.New()
wSrc, wDst, warray := differ.DiffLinesToRunes(string(oldDockerfile), regexp.MustCompile(`\n{3,}`).ReplaceAllString(buf.String(), "\n\n"))
diffs := differ.DiffMainRunes(wSrc, wDst, false)
diffs = differ.DiffCharsToLines(diffs, warray)
if len(diffs) == 1 && diffs[0].Type == diff.DiffEqual {
// No diff, everything equal: Nothing to display
return
}
fmt.Printf("--- %s\n", oldName)
fmt.Println("+++ b/Dockerfile")
color.Cyan("@@ -0,%d +0,%d @@",
lenOldDockerfile,
len(strings.Split(differ.DiffText2(diffs), "\n")),
)
for _, d := range diffs {
var text = d.Text
if text[len(text)-1] == '\n' {
text = text[:len(text)-1]
}
for _, l := range strings.Split(text, "\n") {
switch d.Type {
case diff.DiffInsert:
color.Green("+ %s\n", l)
case diff.DiffDelete:
color.Red("- %s\n", l)
case diff.DiffEqual:
fmt.Printf(" %s\n", l)
}
}
}
}
func getPackage() (string, error) {
cwd, err := os.Getwd()
if err != nil {