From b939bb8cfe91acb0ba688d7fc6d25ed2c0c37311 Mon Sep 17 00:00:00 2001 From: jolheiser Date: Tue, 4 Jun 2024 22:17:05 -0500 Subject: [PATCH] feat: cfg Signed-off-by: jolheiser --- example/example.dhall | 7 +++ example/example.json | 9 +++ example/example.jsonc | 10 ++++ example/example.nix | 1 + example/example.toml | 4 ++ example/example.yaml | 6 ++ go.mod | 16 ++++++ go.sum | 83 +++++++++++++++++++++++++++ main.go | 129 ++++++++++++++++++++++++++++++++++++++++++ 9 files changed, 265 insertions(+) create mode 100644 example/example.dhall create mode 100644 example/example.json create mode 100644 example/example.jsonc create mode 100644 example/example.nix create mode 100644 example/example.toml create mode 100644 example/example.yaml create mode 100644 go.mod create mode 100644 go.sum create mode 100644 main.go diff --git a/example/example.dhall b/example/example.dhall new file mode 100644 index 0000000..23a57c2 --- /dev/null +++ b/example/example.dhall @@ -0,0 +1,7 @@ +let name = "jolheiser" + +in { username = name + , home = "/home/${name}" + , admins = [ name, "admin" ] + , email = "${name}@example.com" + } diff --git a/example/example.json b/example/example.json new file mode 100644 index 0000000..c9990b9 --- /dev/null +++ b/example/example.json @@ -0,0 +1,9 @@ +{ + "admins": [ + "jolheiser", + "admin" + ], + "email": "jolheiser@example.com", + "home": "/home/jolheiser", + "username": "jolheiser" +} \ No newline at end of file diff --git a/example/example.jsonc b/example/example.jsonc new file mode 100644 index 0000000..f0a8b52 --- /dev/null +++ b/example/example.jsonc @@ -0,0 +1,10 @@ +{ + "admins": [ + "jolheiser", + "admin" + ], + "email": "jolheiser@example.com", + "home": "/home/jolheiser", + // The user! + "username": "jolheiser", +} diff --git a/example/example.nix b/example/example.nix new file mode 100644 index 0000000..146bb8f --- /dev/null +++ b/example/example.nix @@ -0,0 +1 @@ +{ admins = [ "jolheiser" "admin" ]; email = "jolheiser@example.com"; home = "/home/jolheiser"; username = "jolheiser"; } diff --git a/example/example.toml b/example/example.toml new file mode 100644 index 0000000..21ef578 --- /dev/null +++ b/example/example.toml @@ -0,0 +1,4 @@ +admins = ['jolheiser', 'admin'] +email = 'jolheiser@example.com' +home = '/home/jolheiser' +username = 'jolheiser' diff --git a/example/example.yaml b/example/example.yaml new file mode 100644 index 0000000..582f0ed --- /dev/null +++ b/example/example.yaml @@ -0,0 +1,6 @@ +admins: + - jolheiser + - admin +email: jolheiser@example.com +home: /home/jolheiser +username: jolheiser diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..15cf553 --- /dev/null +++ b/go.mod @@ -0,0 +1,16 @@ +module go.jolheiser.com/cfg + +go 1.22.3 + +require ( + github.com/pelletier/go-toml/v2 v2.2.2 + github.com/philandstuff/dhall-golang/v6 v6.0.2 + github.com/tailscale/hujson v0.0.0-20221223112325-20486734a56a + go.jolheiser.com/nixfig v0.0.0-20231129190849-8b2170b2ecda + gopkg.in/yaml.v3 v3.0.1 +) + +require ( + github.com/fxamacker/cbor/v2 v2.2.1-0.20200511212021-28e39be4a84f // indirect + github.com/x448/float16 v0.8.4 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..5cc0287 --- /dev/null +++ b/go.sum @@ -0,0 +1,83 @@ +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/alecthomas/assert/v2 v2.4.0 h1:/ZiZ0NnriAWPYYO+4eOjgzNELrFQLaHNr92mHSHFj9U= +github.com/alecthomas/assert/v2 v2.4.0/go.mod h1:fw5suVxB+wfYJ3291t0hRTqtGzFYdSwstnRQdaQx2DM= +github.com/alecthomas/repr v0.3.0 h1:NeYzUPfjjlqHY4KtzgKJiWd6sVq2eNUPTi34PiFGjY8= +github.com/alecthomas/repr v0.3.0/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4= +github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +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/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo= +github.com/fxamacker/cbor/v2 v2.2.1-0.20200511212021-28e39be4a84f h1:lvGFo/tDOSQ4FKu0d2694s8XyOfAL6FLR9DCD5BIUW4= +github.com/fxamacker/cbor/v2 v2.2.1-0.20200511212021-28e39be4a84f/go.mod h1:TA1xS00nchWmaBnEIxPSE5oHLuJBAVvqrtAnWBwBCVo= +github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM= +github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U= +github.com/google/go-cmp v0.5.8 h1:e6P7q2lk1O+qJJb4BtCQXlK8vWEO8V1ZeuEdJNOqZyg= +github.com/google/go-cmp v0.5.8/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY= +github.com/hexops/gotextdiff v1.0.3 h1:gitA9+qJrrTCsiCl7+kh75nPqQt1cx4ZkudSTLoUqJM= +github.com/hexops/gotextdiff v1.0.3/go.mod h1:pSWU5MAI3yDq+fZBTazCSJysOMbxWL1BSow5/V2vxeg= 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h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/main.go b/main.go new file mode 100644 index 0000000..213bddb --- /dev/null +++ b/main.go @@ -0,0 +1,129 @@ +package main + +import ( + "encoding/json" + "errors" + "flag" + "fmt" + "os" + "path/filepath" + "strings" + + "github.com/pelletier/go-toml/v2" + "github.com/philandstuff/dhall-golang/v6" + "github.com/tailscale/hujson" + "go.jolheiser.com/nixfig" + "gopkg.in/yaml.v3" +) + +func maine() error { + var unmarshal func([]byte, any) error + var marshal func(any) ([]byte, error) + + fs := flag.NewFlagSet("cfg", flag.ExitOnError) + fromFunc := func(s string) error { + switch strings.ToLower(s) { + case "json", "jsonc": + unmarshal = func(b []byte, a any) error { + b, err := hujson.Standardize(b) + if err != nil { + return err + } + return json.Unmarshal(b, a) + } + case "yaml": + unmarshal = yaml.Unmarshal + case "toml": + unmarshal = toml.Unmarshal + case "dhall": + unmarshal = dhall.Unmarshal + case "nix": + unmarshal = nixfig.Unmarshal + default: + return fmt.Errorf("unknown format %q", s) + } + return nil + } + fs.Func("from", "The format to convert from", fromFunc) + fs.Func("f", "--from", fromFunc) + toFunc := func(s string) error { + switch strings.ToLower(s) { + case "json", "jsonc": + marshal = func(a any) ([]byte, error) { + return json.MarshalIndent(a, "", "\t") + } + case "yaml": + marshal = yaml.Marshal + case "toml": + marshal = toml.Marshal + case "nix": + marshal = nixfig.Marshal + default: + return fmt.Errorf("unknown format %q", s) + } + return nil + } + fs.Func("to", "The format to convert to", toFunc) + fs.Func("t", "--to", toFunc) + if err := fs.Parse(os.Args[1:]); err != nil { + return err + } + + if fs.NArg() < 1 { + return errors.New("cfg requires at least an input file") + } + + in := fs.Arg(0) + if unmarshal == nil { + if err := fromFunc(strings.TrimPrefix(filepath.Ext(fs.Arg(0)), ".")); err != nil { + return err + } + } + + out := os.Stdout + if fs.NArg() > 1 { + fi, err := os.Create(fs.Arg(1)) + if err != nil { + return err + } + defer fi.Close() + out = fi + + if marshal == nil { + if err := toFunc(strings.TrimPrefix(filepath.Ext(fs.Arg(1)), ".")); err != nil { + return err + } + } + } else if marshal == nil { + marshal = json.Marshal + } + + var data any + + inData, err := os.ReadFile(in) + if err != nil { + return err + } + + if err := unmarshal(inData, &data); err != nil { + return err + } + + outData, err := marshal(data) + if err != nil { + return err + } + + if _, err := out.Write(outData); err != nil { + return err + } + + return nil +} + +func main() { + if err := maine(); err != nil { + fmt.Println(err) + os.Exit(1) + } +}