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// Copyright 2015 Google Inc. All rights reserved
//
// 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 kati
import (
"crypto/sha1"
"io/ioutil"
"time"
)
type DepGraph struct {
nodes []*DepNode
vars Vars
readMks []*ReadMakefile
exports map[string]bool
isCached bool
}
func (g *DepGraph) Nodes() []*DepNode { return g.nodes }
func (g *DepGraph) Vars() Vars { return g.vars }
func (g *DepGraph) Exports() map[string]bool { return g.exports }
func (g *DepGraph) IsCached() bool { return g.isCached }
type LoadOpt struct {
Targets []string
CommandLineVars []string
EnvironmentVars []string
UseCache bool
}
func Load(makefile string, opt LoadOpt) (*DepGraph, error) {
startTime := time.Now()
if makefile == "" {
makefile = DefaultMakefile()
}
if opt.UseCache {
g := LoadDepGraphCache(makefile, opt.Targets)
if g != nil {
return g, nil
}
}
bmk := BootstrapMakefile(opt.Targets)
content, err := ioutil.ReadFile(makefile)
if err != nil {
return nil, err
}
mk, err := ParseMakefile(content, makefile)
if err != nil {
return nil, err
}
for _, stmt := range mk.stmts {
stmt.show()
}
mk.stmts = append(bmk.stmts, mk.stmts...)
vars := make(Vars)
err = InitVars(vars, opt.EnvironmentVars, "environment")
if err != nil {
return nil, err
}
err = InitVars(vars, opt.CommandLineVars, "command line")
if err != nil {
return nil, err
}
er, err := Eval(mk, vars, opt.UseCache)
if err != nil {
return nil, err
}
vars.Merge(er.vars)
LogStats("eval time: %q", time.Since(startTime))
LogStats("shell func time: %q %d", shellStats.Duration(), shellStats.Count())
startTime = time.Now()
db := NewDepBuilder(er, vars)
LogStats("dep build prepare time: %q", time.Since(startTime))
startTime = time.Now()
nodes, err := db.Eval(opt.Targets)
if err != nil {
return nil, err
}
LogStats("dep build time: %q", time.Since(startTime))
var readMks []*ReadMakefile
// Always put the root Makefile as the first element.
readMks = append(readMks, &ReadMakefile{
Filename: makefile,
Hash: sha1.Sum(content),
State: FileExists,
})
readMks = append(readMks, er.readMks...)
return &DepGraph{
nodes: nodes,
vars: vars,
readMks: readMks,
exports: er.exports,
}, nil
}
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