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|
package main
import (
"flag"
"fmt"
"os"
"runtime/pprof"
"strings"
"time"
)
var (
katiLogFlag bool
makefileFlag string
dryRunFlag bool
cpuprofile string
heapprofile string
katiStatsFlag bool
)
func parseFlags() {
// TODO: Make this default and replace this by -d flag.
flag.BoolVar(&katiLogFlag, "kati_log", false, "Verbose kati specific log")
flag.StringVar(&makefileFlag, "f", "", "Use it as a makefile")
flag.BoolVar(&dryRunFlag, "n", false, "Only print the commands that would be executed")
flag.StringVar(&cpuprofile, "kati_cpuprofile", "", "write cpu profile to `file`")
flag.StringVar(&heapprofile, "kati_heapprofile", "", "write heap profile to `file`")
flag.BoolVar(&katiStatsFlag, "kati_stats", false, "Show a bunch of statistics")
flag.Parse()
}
func parseCommandLine() ([]string, []string) {
var vars []string
var targets []string
for _, arg := range flag.Args() {
if strings.IndexByte(arg, '=') >= 0 {
vars = append(vars, arg)
continue
}
targets = append(targets, arg)
}
return vars, targets
}
func getBootstrapMakefile(targets []string) Makefile {
bootstrap := `
CC:=cc
CXX:=g++
AR:=ar
MAKE:=kati
# Pretend to be GNU make 3.81, for compatibility.
MAKE_VERSION:=3.81
SHELL:=/bin/sh
# TODO: Add more builtin vars.
# http://www.gnu.org/software/make/manual/make.html#Catalogue-of-Rules
# The document above is actually not correct. See default.c:
# http://git.savannah.gnu.org/cgit/make.git/tree/default.c?id=4.1
.c.o:
$(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c -o $@ $<
.cc.o:
$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c -o $@ $<
# TODO: Add more builtin rules.
`
bootstrap = fmt.Sprintf("%s\nMAKECMDGOALS:=%s\n", bootstrap, strings.Join(targets, " "))
mk, err := ParseMakefileString(bootstrap, BootstrapMakefile, 0)
if err != nil {
panic(err)
}
return mk
}
func maybeWriteHeapProfile() {
if heapprofile != "" {
f, err := os.Create(heapprofile)
if err != nil {
panic(err)
}
pprof.WriteHeapProfile(f)
}
}
func main() {
parseFlags()
if cpuprofile != "" {
f, err := os.Create(cpuprofile)
if err != nil {
panic(err)
}
pprof.StartCPUProfile(f)
defer pprof.StopCPUProfile()
}
defer maybeWriteHeapProfile()
defer dumpStats()
clvars, targets := parseCommandLine()
startTime := time.Now()
bmk := getBootstrapMakefile(targets)
var mk Makefile
var err error
if len(makefileFlag) > 0 {
mk, err = ParseMakefile(makefileFlag)
} else {
mk, err = ParseDefaultMakefile()
}
if err != nil {
panic(err)
}
for _, stmt := range mk.stmts {
stmt.show()
}
mk.stmts = append(bmk.stmts, mk.stmts...)
vars := make(Vars)
for _, env := range os.Environ() {
kv := strings.SplitN(env, "=", 2)
Log("envvar %q", kv)
if len(kv) < 2 {
panic(fmt.Sprintf("A weird environ variable %q", kv))
}
vars.Assign(kv[0], RecursiveVar{
expr: literal(kv[1]),
origin: "environment",
})
}
vars.Assign("MAKEFILE_LIST", SimpleVar{value: []byte{}, origin: "file"})
for _, v := range clvars {
kv := strings.SplitN(v, "=", 2)
Log("cmdlinevar %q", kv)
if len(kv) < 2 {
panic(fmt.Sprintf("unexpected command line var %q", kv))
}
vars.Assign(kv[0], RecursiveVar{
expr: literal(kv[1]),
origin: "command line",
})
}
er, err := Eval(mk, vars)
if err != nil {
panic(err)
}
vars.Merge(er.vars)
LogStats("eval time: %q", time.Now().Sub(startTime))
startTime = time.Now()
db := NewDepBuilder(er, vars)
LogStats("eval command prepare time: %q", time.Now().Sub(startTime))
startTime = time.Now()
nodes, err2 := db.Eval(targets)
if err2 != nil {
panic(err2)
}
LogStats("eval command time: %q", time.Now().Sub(startTime))
startTime = time.Now()
ex := NewExecutor(vars)
err = ex.Exec(nodes)
if err != nil {
panic(err)
}
LogStats("exec time: %q", time.Now().Sub(startTime))
}
|
