0f4df23290
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60 lines
1.2 KiB
Go
60 lines
1.2 KiB
Go
package cmd
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"runtime/trace"
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"sort"
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"strings"
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"github.com/cubicdaiya/gonp"
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)
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func Diff(ctx context.Context, dir, name string, opts *Options) error {
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stderr := opts.Stderr
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output, err := Generate(ctx, dir, name, opts)
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if err != nil {
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return err
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}
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defer trace.StartRegion(ctx, "checkfiles").End()
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var errored bool
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keys := make([]string, 0, len(output))
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for k, _ := range output {
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kk := k
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keys = append(keys, kk)
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}
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sort.Strings(keys)
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for _, filename := range keys {
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source := output[filename]
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if _, err := os.Stat(filename); errors.Is(err, os.ErrNotExist) {
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errored = true
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// stdout message
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continue
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}
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existing, err := os.ReadFile(filename)
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if err != nil {
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errored = true
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fmt.Fprintf(stderr, "%s: %s\n", filename, err)
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continue
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}
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diff := gonp.New(getLines(existing), getLines([]byte(source)))
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diff.Compose()
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uniHunks := filterHunks(diff.UnifiedHunks())
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if len(uniHunks) > 0 {
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errored = true
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fmt.Fprintf(stderr, "--- a%s\n", strings.TrimPrefix(filename, dir))
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fmt.Fprintf(stderr, "+++ b%s\n", strings.TrimPrefix(filename, dir))
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diff.FprintUniHunks(stderr, uniHunks)
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}
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}
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if errored {
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return errors.New("diff found")
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}
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return nil
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}
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