mirror of
https://github.com/mappu/miqt.git
synced 2024-12-23 01:18:37 +00:00
120 lines
2.4 KiB
Go
120 lines
2.4 KiB
Go
package main
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"log"
|
|
"os/exec"
|
|
"sync"
|
|
)
|
|
|
|
func clangExec(ctx context.Context, clangBin, inputHeader string, cflags []string) ([]interface{}, error) {
|
|
|
|
clangArgs := []string{`-x`, `c++`}
|
|
clangArgs = append(clangArgs, cflags...)
|
|
clangArgs = append(clangArgs, `-Xclang`, `-ast-dump=json`, `-fsyntax-only`, inputHeader)
|
|
|
|
cmd := exec.CommandContext(ctx, clangBin, clangArgs...)
|
|
pr, err := cmd.StdoutPipe()
|
|
if err != nil {
|
|
return nil, fmt.Errorf("StdoutPipe: %w", err)
|
|
}
|
|
|
|
err = cmd.Start()
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Start: %w", err)
|
|
}
|
|
|
|
var wg sync.WaitGroup
|
|
var inner []interface{}
|
|
|
|
wg.Add(1)
|
|
go func() {
|
|
defer wg.Done()
|
|
|
|
inner__, err := clangStripUpToFile(pr, inputHeader)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
inner = inner__
|
|
}()
|
|
|
|
err = cmd.Wait()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
wg.Wait()
|
|
|
|
return inner, nil
|
|
}
|
|
|
|
// clangStripUpToFile strips all AST nodes from the clang output until we find
|
|
// one that really originated in the source file.
|
|
// This cleans out everything in the translation unit that came from an
|
|
// #included file.
|
|
// @ref https://stackoverflow.com/a/71128654
|
|
func clangStripUpToFile(stdout io.Reader, inputFilePath string) ([]interface{}, error) {
|
|
|
|
var obj = map[string]interface{}{}
|
|
err := json.NewDecoder(stdout).Decode(&obj)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
inner, ok := obj["inner"].([]interface{})
|
|
if !ok {
|
|
return nil, errors.New("no inner")
|
|
}
|
|
|
|
var markerPosition int = -1
|
|
|
|
for i, entry := range inner {
|
|
|
|
entry, ok := entry.(map[string]interface{})
|
|
if !ok {
|
|
return nil, errors.New("entry is not a map")
|
|
}
|
|
|
|
if _, ok := entry["isImplicit"]; ok {
|
|
continue
|
|
}
|
|
|
|
var match_filename = ""
|
|
|
|
if loc, ok := entry["loc"].(map[string]interface{}); ok {
|
|
if includedFrom, ok := loc["includedFrom"].(map[string]interface{}); ok {
|
|
if filename, ok := includedFrom["file"].(string); ok {
|
|
match_filename = filename
|
|
}
|
|
}
|
|
|
|
if match_filename == "" {
|
|
if expansionloc, ok := loc["expansionLoc"].(map[string]interface{}); ok {
|
|
if filename, ok := expansionloc["file"].(string); ok {
|
|
match_filename = filename
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
return nil, errors.New("no loc")
|
|
}
|
|
|
|
if match_filename == inputFilePath {
|
|
// Found the marker position
|
|
markerPosition = i
|
|
break
|
|
}
|
|
}
|
|
|
|
log.Printf("found first instance of same file at inner entry %d/%d", markerPosition, len(inner))
|
|
|
|
inner = inner[markerPosition:]
|
|
|
|
return inner, nil
|
|
}
|