29 lines
620 B
Go
29 lines
620 B
Go
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package main
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import (
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"fmt"
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"io"
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"os"
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"github.com/kylelemons/godebug/diff"
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)
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// Generate a diff between a string a a file.
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func FileDiff(s string, fileToDiff string) (string, error) {
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// Open file.
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f, err := os.Open(fileToDiff)
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if err != nil {
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return "", fmt.Errorf("error opening file %s: %s", fileToDiff, err)
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}
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// Close file after done.
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defer f.Close()
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// Read all data from file.
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expected, err := io.ReadAll(f)
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if err != nil {
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return "", fmt.Errorf("error reading file %s: %s", fileToDiff, err)
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}
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// Compare expected file against provided string.
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return diff.Diff(string(expected), s), nil
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}
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