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package main |
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import ( |
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"bytes" |
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"flag" |
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"fmt" |
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"io" |
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"os" |
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"olexsmir.xyz/clerk/journal" |
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"olexsmir.xyz/clerk/journal/printer" |
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) |
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func runFormat(args []string) { |
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fs := flag.NewFlagSet("format", flag.ExitOnError) |
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write := fs.Bool("w", false, "Write result back to file instead of stdout") |
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diff := fs.Bool("d", false, "Display diffs instead of rewriting files") |
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check := fs.Bool("check", false, "Exit code 0 if already formatted, 1 otherwise") |
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fs.Usage = func() { |
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fmt.Fprintf(os.Stderr, "Usage: clerk format [flags] [path ...]\n") |
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fs.PrintDefaults() |
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} |
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fs.Parse(args) |
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paths := fs.Args() |
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// Read from stdin if no paths given |
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if len(paths) == 0 { |
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src, err := io.ReadAll(os.Stdin) |
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if err != nil { |
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fmt.Fprintf(os.Stderr, "error reading stdin: %v\n", err) |
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os.Exit(1) |
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} |
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pf, err := journal.NewLoader().LoadBytes("stdin", src) |
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if err != nil { |
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fmt.Fprintf(os.Stderr, "parse error: %v\n", err) |
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os.Exit(1) |
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} |
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var buf bytes.Buffer |
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if err := printer.Fprint(&buf, pf.Ast); err != nil { |
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fmt.Fprintf(os.Stderr, "format error: %v\n", err) |
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os.Exit(1) |
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} |
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if *check { |
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if bytes.Equal(src, buf.Bytes()) { |
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os.Exit(0) |
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} |
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os.Exit(1) |
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} |
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os.Stdout.Write(buf.Bytes()) |
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return |
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} |
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// Process each file |
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exitCode := 0 |
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for _, path := range paths { |
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info, err := os.Stat(path) |
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if err != nil { |
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fmt.Fprintf(os.Stderr, "error: %s: %v\n", path, err) |
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exitCode = 1 |
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continue |
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} |
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if info.IsDir() { |
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fmt.Fprintf(os.Stderr, "error: %s: can only format files, not directories\n", path) |
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exitCode = 1 |
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continue |
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} |
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src, err := os.ReadFile(path) |
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if err != nil { |
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fmt.Fprintf(os.Stderr, "error: %s: %v\n", path, err) |
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exitCode = 1 |
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continue |
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} |
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pf, err := journal.NewLoader().LoadBytes(path, src) |
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if err != nil { |
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fmt.Fprintf(os.Stderr, "error: %s: %v\n", path, err) |
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exitCode = 1 |
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continue |
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} |
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var buf bytes.Buffer |
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if err := printer.Fprint(&buf, pf.Ast); err != nil { |
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fmt.Fprintf(os.Stderr, "error: %s: %v\n", path, err) |
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exitCode = 1 |
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continue |
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} |
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formatted := buf.Bytes() |
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if *check { |
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if !bytes.Equal(src, formatted) { |
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fmt.Fprintf(os.Stderr, "%s: not formatted\n", path) |
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exitCode = 1 |
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} |
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continue |
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} |
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if *diff { |
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diffLines(path, src, formatted) |
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continue |
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} |
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if *write { |
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if err := os.WriteFile(path, formatted, 0o644); err != nil { |
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fmt.Fprintf(os.Stderr, "error: %s: %v\n", path, err) |
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exitCode = 1 |
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} |
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} else { |
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os.Stdout.Write(formatted) |
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} |
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} |
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os.Exit(exitCode) |
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} |
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func diffLines(path string, src, formatted []byte) { |
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// simple diff display |
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if bytes.Equal(src, formatted) { |
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return |
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} |
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fmt.Fprintf(os.Stderr, "--- %s\n+++ %s\n", path, path) |
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// TODO: proper line-by-line diff |
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} |