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author | uzhas <uzhas@ydb.tech> | 2023-11-16 16:04:50 +0300 |
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committer | uzhas <uzhas@ydb.tech> | 2023-11-16 17:46:46 +0300 |
commit | 46f0c0079bb50609d2eeb6586642bcf114fc5239 (patch) | |
tree | 84e4e4978d57fe5de321ba69bf9d0c290de60a66 /vendor/go.uber.org/atomic/internal/gen-atomicwrapper/main.go | |
parent | 73045e389397816cc2bdd6cd7818b4bce427b265 (diff) | |
download | ydb-46f0c0079bb50609d2eeb6586642bcf114fc5239.tar.gz |
enable ya make for go projects
Diffstat (limited to 'vendor/go.uber.org/atomic/internal/gen-atomicwrapper/main.go')
-rw-r--r-- | vendor/go.uber.org/atomic/internal/gen-atomicwrapper/main.go | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/vendor/go.uber.org/atomic/internal/gen-atomicwrapper/main.go b/vendor/go.uber.org/atomic/internal/gen-atomicwrapper/main.go new file mode 100644 index 0000000000..982254d39d --- /dev/null +++ b/vendor/go.uber.org/atomic/internal/gen-atomicwrapper/main.go @@ -0,0 +1,203 @@ +// Copyright (c) 2020-2022 Uber Technologies, Inc. +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +// gen-atomicwrapper generates wrapper types around other atomic types. +// +// It supports plugging in functions which convert the value inside the atomic +// type to the user-facing value. For example, +// +// Given, atomic.Value and the functions, +// +// func packString(string) interface{} +// func unpackString(interface{}) string +// +// We can run the following command: +// +// gen-atomicwrapper -name String -wrapped Value \ +// -type string -pack fromString -unpack tostring +// +// This wil generate approximately, +// +// type String struct{ v Value } +// +// func (s *String) Load() string { +// return unpackString(v.Load()) +// } +// +// func (s *String) Store(s string) { +// return s.v.Store(packString(s)) +// } +// +// The packing/unpacking logic allows the stored value to be different from +// the user-facing value. +package main + +import ( + "bytes" + "embed" + "errors" + "flag" + "fmt" + "go/format" + "io" + "log" + "os" + "sort" + "strings" + "text/template" + "time" +) + +func main() { + log.SetFlags(0) + if err := run(os.Args[1:]); err != nil { + log.Fatalf("%+v", err) + } +} + +type stringList []string + +func (sl *stringList) String() string { + return strings.Join(*sl, ",") +} + +func (sl *stringList) Set(s string) error { + for _, i := range strings.Split(s, ",") { + *sl = append(*sl, strings.TrimSpace(i)) + } + return nil +} + +func run(args []string) error { + var opts struct { + Name string + Wrapped string + Type string + + Imports stringList + Pack, Unpack string + + CAS bool + CompareAndSwap bool + Swap bool + JSON bool + + File string + ToYear int + } + + opts.ToYear = time.Now().Year() + + flag := flag.NewFlagSet("gen-atomicwrapper", flag.ContinueOnError) + + // Required flags + flag.StringVar(&opts.Name, "name", "", + "name of the generated type (e.g. Duration)") + flag.StringVar(&opts.Wrapped, "wrapped", "", + "name of the wrapped atomic (e.g. Int64)") + flag.StringVar(&opts.Type, "type", "", + "name of the type exposed by the atomic (e.g. time.Duration)") + + // Optional flags + flag.Var(&opts.Imports, "imports", + "comma separated list of imports to add") + flag.StringVar(&opts.Pack, "pack", "", + "function to transform values with before storage") + flag.StringVar(&opts.Unpack, "unpack", "", + "function to reverse packing on loading") + flag.StringVar(&opts.File, "file", "", + "output file path (default: stdout)") + + // Switches for individual methods. Underlying atomics must support + // these. + flag.BoolVar(&opts.CAS, "cas", false, + "generate a deprecated `CAS(old, new) bool` method; requires -pack") + flag.BoolVar(&opts.CompareAndSwap, "compareandswap", false, + "generate a `CompareAndSwap(old, new) bool` method; requires -pack") + flag.BoolVar(&opts.Swap, "swap", false, + "generate a `Swap(new) old` method; requires -pack and -unpack") + flag.BoolVar(&opts.JSON, "json", false, + "generate `MarshalJSON/UnmarshJSON` methods") + + if err := flag.Parse(args); err != nil { + return err + } + + if len(opts.Name) == 0 || + len(opts.Wrapped) == 0 || + len(opts.Type) == 0 || + len(opts.Pack) == 0 || + len(opts.Unpack) == 0 { + return errors.New("flags -name, -wrapped, -pack, -unpack and -type are required") + } + + if opts.CAS { + opts.CompareAndSwap = true + } + + var w io.Writer = os.Stdout + if file := opts.File; len(file) > 0 { + f, err := os.Create(file) + if err != nil { + return fmt.Errorf("create %q: %v", file, err) + } + defer f.Close() + + w = f + } + + // Import encoding/json if needed. + if opts.JSON { + found := false + for _, imp := range opts.Imports { + if imp == "encoding/json" { + found = true + break + } + } + + if !found { + opts.Imports = append(opts.Imports, "encoding/json") + } + } + + sort.Strings([]string(opts.Imports)) + + var buff bytes.Buffer + if err := _tmpl.ExecuteTemplate(&buff, "wrapper.tmpl", opts); err != nil { + return fmt.Errorf("render template: %v", err) + } + + bs, err := format.Source(buff.Bytes()) + if err != nil { + return fmt.Errorf("reformat source: %v", err) + } + + io.WriteString(w, "// @generated Code generated by gen-atomicwrapper.\n\n") + _, err = w.Write(bs) + return err +} + +var ( + //go:embed *.tmpl + _tmplFS embed.FS + + _tmpl = template.Must(template.New("atomicwrapper").ParseFS(_tmplFS, "*.tmpl")) +) |