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47 lines
1 KiB
Go
47 lines
1 KiB
Go
package gomoddirectives
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import (
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"encoding/json"
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"errors"
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"fmt"
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"io/ioutil"
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"os/exec"
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"golang.org/x/mod/modfile"
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)
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type modInfo struct {
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Path string `json:"Path"`
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Dir string `json:"Dir"`
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GoMod string `json:"GoMod"`
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GoVersion string `json:"GoVersion"`
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Main bool `json:"Main"`
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}
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// GetModuleFile gets module file.
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func GetModuleFile() (*modfile.File, error) {
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// https://github.com/golang/go/issues/44753#issuecomment-790089020
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cmd := exec.Command("go", "list", "-m", "-json")
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raw, err := cmd.CombinedOutput()
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if err != nil {
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return nil, fmt.Errorf("command go list: %w: %s", err, string(raw))
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}
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var v modInfo
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err = json.Unmarshal(raw, &v)
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if err != nil {
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return nil, fmt.Errorf("unmarshaling error: %w: %s", err, string(raw))
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}
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if v.GoMod == "" {
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return nil, errors.New("working directory is not part of a module")
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}
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raw, err = ioutil.ReadFile(v.GoMod)
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if err != nil {
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return nil, fmt.Errorf("reading go.mod file: %w", err)
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}
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return modfile.Parse("go.mod", raw, nil)
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}
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