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feat: Add workaround for Golang's stdlib (#72)
* feat: Add workaround for Golang's stdlib * fix: Success when no files are specified * fix: Try writing file in /tmp
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,7 @@ | ||
| module example | ||
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| go 1.21.4 | ||
| go 1.21.0 | ||
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| toolchain go1.21.4 | ||
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| require golang.org/x/net v0.16.0 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| package tool | ||
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| import ( | ||
| "bufio" | ||
| "io" | ||
| "os" | ||
| "path/filepath" | ||
| "strings" | ||
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| "github.com/samber/lo" | ||
| ) | ||
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| func patchGoModFilesForStdlib(srcDir string, files []string) string { | ||
| // Copy the files to a temporary directory because /src is read-only | ||
| dstDir := "/tmp/src" | ||
| if err := CopyFiles(files, srcDir, dstDir); err != nil { | ||
| return srcDir | ||
| } | ||
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| // Find and patch the go.mod files | ||
| lo.ForEach(files, func(file string, _ int) { | ||
| if strings.HasSuffix(file, "go.mod") { | ||
| patchGoModFileForStdlib(filepath.Join(dstDir, file)) | ||
| } | ||
| }) | ||
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| return dstDir | ||
| } | ||
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| // Find lines in go.mod files that specify the Go version and replace them with a require statement for the stdlib module. | ||
| func patchGoModFileForStdlib(filename string) { | ||
| tempFilename := filename + ".tmp" | ||
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| // Open the original file for reading | ||
| inputFile, err := os.Open(filename) | ||
| if err != nil { | ||
| return | ||
| } | ||
| defer inputFile.Close() | ||
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| // Create a temporary file for writing | ||
| tempFile, err := os.Create(tempFilename) | ||
| if err != nil { | ||
| return | ||
| } | ||
| defer tempFile.Close() | ||
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| scanner := bufio.NewScanner(inputFile) | ||
| writer := bufio.NewWriter(tempFile) | ||
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| // Process the file line by line | ||
| for scanner.Scan() { | ||
| line := scanner.Text() | ||
| // Find go version statement | ||
| if strings.HasPrefix(line, "go ") { | ||
| version := strings.TrimPrefix(line, "go ") | ||
| line = "require stdlib v" + version | ||
| } | ||
| // Find toolchain statement | ||
| if strings.HasPrefix(line, "toolchain go") { | ||
| version := strings.TrimPrefix(line, "toolchain go") | ||
| line = "require stdlib v" + version | ||
| } | ||
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| _, err := writer.WriteString(line + "\n") | ||
| if err != nil { | ||
| return | ||
| } | ||
| } | ||
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| if err := scanner.Err(); err != nil { | ||
| return | ||
| } | ||
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| // Flush the writer | ||
| if err := writer.Flush(); err != nil { | ||
| return | ||
| } | ||
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| // Close both files | ||
| inputFile.Close() | ||
| tempFile.Close() | ||
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| // Replace the original file with the temporary file | ||
| if err := os.Rename(tempFilename, filename); err != nil { | ||
| return | ||
| } | ||
| } | ||
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| // CopyFiles copies specific files from the source directory to the destination directory. | ||
| func CopyFiles(files []string, srcDir string, dstDir string) error { | ||
| for _, file := range files { | ||
| srcPath := filepath.Join(srcDir, file) | ||
| dstPath := filepath.Join(dstDir, file) | ||
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| // Ensure the destination directory exists | ||
| if err := os.MkdirAll(filepath.Dir(dstPath), os.ModePerm); err != nil { | ||
| return err | ||
| } | ||
|
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| // Copy the file | ||
| if err := CopyFile(srcPath, dstPath); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
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| // CopyFile copies a single file from src to dst. | ||
| func CopyFile(src, dst string) error { | ||
| sourceFile, err := os.Open(src) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer sourceFile.Close() | ||
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| destinationFile, err := os.Create(dst) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer destinationFile.Close() | ||
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| if _, err := io.Copy(destinationFile, sourceFile); err != nil { | ||
| return err | ||
| } | ||
|
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| return nil | ||
| } |
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