mirror of
https://github.com/numtide/treefmt.git
synced 2024-08-17 04:40:27 +03:00
471 lines
11 KiB
Go
471 lines
11 KiB
Go
package cli
|
|
|
|
import (
|
|
"bufio"
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"os"
|
|
"os/signal"
|
|
"path/filepath"
|
|
"runtime"
|
|
"runtime/pprof"
|
|
"strings"
|
|
"syscall"
|
|
|
|
"git.numtide.com/numtide/treefmt/format"
|
|
"git.numtide.com/numtide/treefmt/stats"
|
|
"github.com/gobwas/glob"
|
|
|
|
"git.numtide.com/numtide/treefmt/cache"
|
|
"git.numtide.com/numtide/treefmt/config"
|
|
"git.numtide.com/numtide/treefmt/walk"
|
|
|
|
"github.com/charmbracelet/log"
|
|
"golang.org/x/sync/errgroup"
|
|
)
|
|
|
|
const (
|
|
BatchSize = 1024
|
|
)
|
|
|
|
var (
|
|
excludes []glob.Glob
|
|
formatters map[string]*format.Formatter
|
|
|
|
filesCh chan *walk.File
|
|
processedCh chan *walk.File
|
|
|
|
ErrFailOnChange = errors.New("unexpected changes detected, --fail-on-change is enabled")
|
|
)
|
|
|
|
func (f *Format) Run() (err error) {
|
|
// set log level and other options
|
|
configureLogging()
|
|
|
|
// cpu profiling
|
|
if Cli.CpuProfile != "" {
|
|
cpuProfile, err := os.Create(Cli.CpuProfile)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to open file for writing cpu profile: %w", err)
|
|
} else if err = pprof.StartCPUProfile(cpuProfile); err != nil {
|
|
return fmt.Errorf("failed to start cpu profile: %w", err)
|
|
}
|
|
defer func() {
|
|
pprof.StopCPUProfile()
|
|
if err := cpuProfile.Close(); err != nil {
|
|
log.Errorf("failed to close cpu profile: %v", err)
|
|
}
|
|
}()
|
|
}
|
|
|
|
// create a prefixed logger
|
|
log.SetPrefix("format")
|
|
|
|
// ensure cache is closed on return
|
|
defer func() {
|
|
if err := cache.Close(); err != nil {
|
|
log.Errorf("failed to close cache: %v", err)
|
|
}
|
|
}()
|
|
|
|
// find the config file unless specified
|
|
if Cli.ConfigFile == "" {
|
|
pwd, err := os.Getwd()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
Cli.ConfigFile, _, err = findUp(pwd, "treefmt.toml")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// default the tree root to the directory containing the config file
|
|
if Cli.TreeRoot == "" {
|
|
Cli.TreeRoot = filepath.Dir(Cli.ConfigFile)
|
|
}
|
|
|
|
// search the tree root using the --tree-root-file if specified
|
|
if Cli.TreeRootFile != "" {
|
|
pwd, err := os.Getwd()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, Cli.TreeRoot, err = findUp(pwd, Cli.TreeRootFile)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
log.Debugf("config-file=%s tree-root=%s", Cli.ConfigFile, Cli.TreeRoot)
|
|
|
|
// read config
|
|
cfg, err := config.ReadFile(Cli.ConfigFile, Cli.Formatters)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read config file %v: %w", Cli.ConfigFile, err)
|
|
}
|
|
|
|
// compile global exclude globs
|
|
if excludes, err = format.CompileGlobs(cfg.Global.Excludes); err != nil {
|
|
return fmt.Errorf("failed to compile global excludes: %w", err)
|
|
}
|
|
|
|
// initialise formatters
|
|
formatters = make(map[string]*format.Formatter)
|
|
|
|
for name, formatterCfg := range cfg.Formatters {
|
|
formatter, err := format.NewFormatter(name, Cli.TreeRoot, formatterCfg, excludes)
|
|
|
|
if errors.Is(err, format.ErrCommandNotFound) && Cli.AllowMissingFormatter {
|
|
log.Debugf("formatter command not found: %v", name)
|
|
continue
|
|
} else if err != nil {
|
|
return fmt.Errorf("%w: failed to initialise formatter: %v", err, name)
|
|
}
|
|
|
|
// store formatter by name
|
|
formatters[name] = formatter
|
|
}
|
|
|
|
// open the cache
|
|
if err = cache.Open(Cli.TreeRoot, Cli.ClearCache, formatters); err != nil {
|
|
return err
|
|
}
|
|
|
|
// create an app context and listen for shutdown
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
|
|
go func() {
|
|
exit := make(chan os.Signal, 1)
|
|
signal.Notify(exit, os.Interrupt, syscall.SIGTERM)
|
|
<-exit
|
|
cancel()
|
|
}()
|
|
|
|
// initialise stats collection
|
|
stats.Init()
|
|
|
|
// create an overall error group for executing high level tasks concurrently
|
|
eg, ctx := errgroup.WithContext(ctx)
|
|
|
|
// create a channel for files needing to be processed
|
|
// we use a multiple of batch size here as a rudimentary concurrency optimization based on the host machine
|
|
filesCh = make(chan *walk.File, BatchSize*runtime.NumCPU())
|
|
|
|
// create a channel for files that have been processed
|
|
processedCh = make(chan *walk.File, cap(filesCh))
|
|
|
|
// start concurrent processing tasks in reverse order
|
|
eg.Go(updateCache(ctx))
|
|
eg.Go(applyFormatters(ctx))
|
|
eg.Go(walkFilesystem(ctx))
|
|
|
|
// wait for everything to complete
|
|
return eg.Wait()
|
|
}
|
|
|
|
func updateCache(ctx context.Context) func() error {
|
|
return func() error {
|
|
// used to batch updates for more efficient txs
|
|
batch := make([]*walk.File, 0, BatchSize)
|
|
|
|
// apply a batch
|
|
processBatch := func() error {
|
|
if err := cache.Update(batch); err != nil {
|
|
return err
|
|
}
|
|
batch = batch[:0]
|
|
return nil
|
|
}
|
|
|
|
LOOP:
|
|
for {
|
|
select {
|
|
// detect ctx cancellation
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
// respond to processed files
|
|
case file, ok := <-processedCh:
|
|
if !ok {
|
|
// channel has been closed, no further files to process
|
|
break LOOP
|
|
}
|
|
// append to batch and process if we have enough
|
|
batch = append(batch, file)
|
|
if len(batch) == BatchSize {
|
|
if err := processBatch(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// final flush
|
|
if err := processBatch(); err != nil {
|
|
return err
|
|
}
|
|
|
|
// if fail on change has been enabled, check that no files were actually formatted, throwing an error if so
|
|
if Cli.FailOnChange && stats.Value(stats.Formatted) != 0 {
|
|
return ErrFailOnChange
|
|
}
|
|
|
|
// print stats to stdout
|
|
stats.Print()
|
|
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func walkFilesystem(ctx context.Context) func() error {
|
|
return func() error {
|
|
eg, ctx := errgroup.WithContext(ctx)
|
|
pathsCh := make(chan string, BatchSize)
|
|
|
|
walkPaths := func() error {
|
|
defer close(pathsCh)
|
|
|
|
var idx int
|
|
for idx < len(Cli.Paths) {
|
|
select {
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
default:
|
|
pathsCh <- Cli.Paths[idx]
|
|
idx += 1
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
walkStdin := func() error {
|
|
defer close(pathsCh)
|
|
|
|
// determine the current working directory
|
|
cwd, err := os.Getwd()
|
|
if err != nil {
|
|
return fmt.Errorf("failed to determine current working directory: %w", err)
|
|
}
|
|
|
|
// read in all the paths
|
|
scanner := bufio.NewScanner(os.Stdin)
|
|
|
|
for scanner.Scan() {
|
|
select {
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
default:
|
|
path := scanner.Text()
|
|
if !strings.HasPrefix(path, "/") {
|
|
// append the cwd
|
|
path = filepath.Join(cwd, path)
|
|
}
|
|
pathsCh <- path
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
if len(Cli.Paths) > 0 {
|
|
eg.Go(walkPaths)
|
|
} else if Cli.Stdin {
|
|
eg.Go(walkStdin)
|
|
} else {
|
|
// no explicit paths to process, so we only need to process root
|
|
pathsCh <- Cli.TreeRoot
|
|
close(pathsCh)
|
|
}
|
|
|
|
// create a filesystem walker
|
|
walker, err := walk.New(Cli.Walk, Cli.TreeRoot, pathsCh)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to create walker: %w", err)
|
|
}
|
|
|
|
// close the files channel when we're done walking the file system
|
|
defer close(filesCh)
|
|
|
|
// if no cache has been configured, we invoke the walker directly
|
|
if Cli.NoCache {
|
|
return walker.Walk(ctx, func(file *walk.File, err error) error {
|
|
select {
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
default:
|
|
// ignore symlinks and directories
|
|
if !(file.Info.IsDir() || file.Info.Mode()&os.ModeSymlink == os.ModeSymlink) {
|
|
stats.Add(stats.Traversed, 1)
|
|
stats.Add(stats.Emitted, 1)
|
|
filesCh <- file
|
|
}
|
|
return nil
|
|
}
|
|
})
|
|
}
|
|
|
|
// otherwise we pass the walker to the cache and have it generate files for processing based on whether or not
|
|
// they have been added/changed since the last invocation
|
|
if err = cache.ChangeSet(ctx, walker, filesCh); err != nil {
|
|
return fmt.Errorf("failed to generate change set: %w", err)
|
|
}
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func applyFormatters(ctx context.Context) func() error {
|
|
// create our own errgroup for concurrent formatting tasks
|
|
fg, ctx := errgroup.WithContext(ctx)
|
|
// simple optimization to avoid too many concurrent formatting tasks
|
|
// we can queue them up faster than the formatters can process them, this paces things a bit
|
|
fg.SetLimit(runtime.NumCPU())
|
|
|
|
// track batches of formatting task based on their batch keys, which are determined by the unique sequence of
|
|
// formatters which should be applied to their respective files
|
|
batches := make(map[string][]*format.Task)
|
|
|
|
apply := func(key string, flush bool) {
|
|
// lookup the batch and exit early if it's empty
|
|
batch := batches[key]
|
|
if len(batch) == 0 {
|
|
return
|
|
}
|
|
|
|
// process the batch if it's full, or we've been asked to flush partial batches
|
|
if flush || len(batch) == BatchSize {
|
|
|
|
// copy the batch as we re-use it for the next batch
|
|
tasks := make([]*format.Task, len(batch))
|
|
copy(tasks, batch)
|
|
|
|
// asynchronously apply the sequence formatters to the batch
|
|
fg.Go(func() error {
|
|
// iterate the formatters, applying them in sequence to the batch of tasks
|
|
// we get the formatters list from the first task since they have all the same formatters list
|
|
for _, f := range tasks[0].Formatters {
|
|
if err := f.Apply(ctx, tasks); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// pass each file to the processed channel
|
|
for _, task := range tasks {
|
|
processedCh <- task.File
|
|
}
|
|
|
|
return nil
|
|
})
|
|
|
|
// reset the batch
|
|
batches[key] = batch[:0]
|
|
}
|
|
}
|
|
|
|
tryApply := func(task *format.Task) {
|
|
// append to batch
|
|
key := task.BatchKey
|
|
batches[key] = append(batches[key], task)
|
|
// try to apply
|
|
apply(key, false)
|
|
}
|
|
|
|
return func() error {
|
|
defer func() {
|
|
// close processed channel
|
|
close(processedCh)
|
|
}()
|
|
|
|
// iterate the files channel
|
|
for file := range filesCh {
|
|
|
|
// determine a list of formatters that are interested in file
|
|
var matches []*format.Formatter
|
|
for _, formatter := range formatters {
|
|
if formatter.Wants(file) {
|
|
matches = append(matches, formatter)
|
|
}
|
|
}
|
|
|
|
if len(matches) == 0 {
|
|
if Cli.OnUnmatched == log.FatalLevel {
|
|
return fmt.Errorf("no formatter for path: %s", file.Path)
|
|
}
|
|
log.Logf(Cli.OnUnmatched, "no formatter for path: %s", file.Path)
|
|
processedCh <- file
|
|
} else {
|
|
// record the match
|
|
stats.Add(stats.Matched, 1)
|
|
// create a new format task, add it to a batch based on its batch key and try to apply if the batch is full
|
|
task := format.NewTask(file, matches)
|
|
tryApply(&task)
|
|
}
|
|
}
|
|
|
|
// flush any partial batches which remain
|
|
for key := range batches {
|
|
apply(key, true)
|
|
}
|
|
|
|
// wait for all outstanding formatting tasks to complete
|
|
if err := fg.Wait(); err != nil {
|
|
return fmt.Errorf("formatting failure: %w", err)
|
|
}
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func findUp(searchDir string, fileName string) (path string, dir string, err error) {
|
|
for _, dir := range eachDir(searchDir) {
|
|
path := filepath.Join(dir, fileName)
|
|
if fileExists(path) {
|
|
return path, dir, nil
|
|
}
|
|
}
|
|
return "", "", fmt.Errorf("could not find %s in %s", fileName, searchDir)
|
|
}
|
|
|
|
func eachDir(path string) (paths []string) {
|
|
path, err := filepath.Abs(path)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
paths = []string{path}
|
|
|
|
if path == "/" {
|
|
return
|
|
}
|
|
|
|
for i := len(path) - 1; i >= 0; i-- {
|
|
if path[i] == os.PathSeparator {
|
|
path = path[:i]
|
|
if path == "" {
|
|
path = "/"
|
|
}
|
|
paths = append(paths, path)
|
|
}
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func fileExists(path string) bool {
|
|
// Some broken filesystems like SSHFS return file information on stat() but
|
|
// then cannot open the file. So we use os.Open.
|
|
f, err := os.Open(path)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
defer f.Close()
|
|
|
|
// Next, check that the file is a regular file.
|
|
fi, err := f.Stat()
|
|
if err != nil {
|
|
return false
|
|
}
|
|
|
|
return fi.Mode().IsRegular()
|
|
}
|