/
template.go
94 lines (83 loc) · 2.31 KB
/
template.go
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// Copyright (C) 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"context"
"flag"
"fmt"
"go/build"
"io/ioutil"
"os"
"path/filepath"
"github.com/google/gapid/gapil/resolver"
"github.com/google/gapid/core/app"
"github.com/google/gapid/core/log"
"github.com/google/gapid/core/os/file"
"github.com/google/gapid/gapil/template"
)
func init() {
app.AddVerb(&app.Verb{
Name: "template",
ShortHelp: "Passes the ast to a template for code generation",
Action: &templateVerb{
Dir: cwd(),
},
})
}
type templateVerb struct {
Dir string `help:"The output directory"`
Tracer string `help:"The template function trace expression"`
Gopath string `help:"the go path to use when looking up packages"`
GlobalList []string `help:"A global value setting for the template"`
Search file.PathList `help:"The set of paths to search for includes"`
}
func (v *templateVerb) Run(ctx context.Context, flags flag.FlagSet) error {
args := flags.Args()
if len(args) < 2 {
app.Usage(ctx, "Missing template file")
return nil
}
apis, mappings, err := resolve(ctx, args[0:1], v.Search, resolver.Options{
ExtractCalls: true,
RemoveDeadCode: true,
})
if err != nil {
return err
}
api := apis[0]
if v.Gopath != "" {
build.Default.GOPATH = filepath.FromSlash(v.Gopath)
}
mainTemplate := args[1]
log.D(ctx, "Reading %v", api.Name())
options := template.Options{
Dir: v.Dir,
APIFile: api.Name(),
Loader: ioutil.ReadFile,
Globals: v.GlobalList,
Tracer: v.Tracer,
}
f, err := template.NewFunctions(ctx, api, mappings, options)
if err != nil {
return err
}
if err := f.Include(mainTemplate); err != nil {
return fmt.Errorf("%s: %s", mainTemplate, err)
}
return nil
}
func cwd() string {
p, _ := os.Getwd()
return p
}