mirror of
https://github.com/MichaelMure/git-bug.git
synced 2024-12-15 18:23:08 +03:00
142 lines
2.9 KiB
Go
142 lines
2.9 KiB
Go
package _select
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import (
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"path"
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"github.com/pkg/errors"
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"github.com/MichaelMure/git-bug/bug"
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"github.com/MichaelMure/git-bug/cache"
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"github.com/MichaelMure/git-bug/entity"
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"github.com/MichaelMure/git-bug/repository"
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)
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const selectFile = "select"
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var ErrNoValidId = errors.New("you must provide a bug id or use the \"select\" command first")
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// ResolveBug first try to resolve a bug using the first argument of the command
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// line. If it fails, it fallback to the select mechanism.
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//
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// Returns:
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// - the bug if any
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// - the new list of command line arguments with the bug prefix removed if it
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// has been used
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// - an error if the process failed
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func ResolveBug(repo *cache.RepoCache, args []string) (*cache.BugCache, []string, error) {
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// At first, try to use the first argument as a bug prefix
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if len(args) > 0 {
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b, err := repo.ResolveBugPrefix(args[0])
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if err == nil {
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return b, args[1:], nil
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}
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if err != bug.ErrBugNotExist {
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return nil, nil, err
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}
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}
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// first arg is not a valid bug prefix, we can safely use the preselected bug if any
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b, err := selected(repo)
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// selected bug is invalid
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if err == bug.ErrBugNotExist {
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// we clear the selected bug
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err = Clear(repo)
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if err != nil {
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return nil, nil, err
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}
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return nil, nil, ErrNoValidId
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}
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// another error when reading the bug
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if err != nil {
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return nil, nil, err
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}
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// bug is successfully retrieved
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if b != nil {
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return b, args, nil
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}
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// no selected bug and no valid first argument
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return nil, nil, ErrNoValidId
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}
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// Select will select a bug for future use
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func Select(repo *cache.RepoCache, id entity.Id) error {
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selectPath := selectFilePath(repo)
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f, err := os.OpenFile(selectPath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0666)
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if err != nil {
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return err
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}
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_, err = f.WriteString(id.String())
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if err != nil {
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return err
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}
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return f.Close()
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}
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// Clear will clear the selected bug, if any
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func Clear(repo *cache.RepoCache) error {
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selectPath := selectFilePath(repo)
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return os.Remove(selectPath)
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}
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func selected(repo *cache.RepoCache) (*cache.BugCache, error) {
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selectPath := selectFilePath(repo)
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f, err := os.Open(selectPath)
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if err != nil {
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if os.IsNotExist(err) {
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return nil, nil
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} else {
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return nil, err
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}
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}
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buf, err := ioutil.ReadAll(io.LimitReader(f, 100))
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if err != nil {
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return nil, err
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}
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if len(buf) == 100 {
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return nil, fmt.Errorf("the select file should be < 100 bytes")
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}
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id := entity.Id(buf)
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if err := id.Validate(); err != nil {
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err = os.Remove(selectPath)
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if err != nil {
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return nil, errors.Wrap(err, "error while removing invalid select file")
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}
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return nil, fmt.Errorf("select file in invalid, removing it")
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}
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b, err := repo.ResolveBug(id)
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if err != nil {
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return nil, err
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}
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err = f.Close()
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if err != nil {
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return nil, err
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}
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return b, nil
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}
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func selectFilePath(repo repository.RepoCommon) string {
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return path.Join(repo.GetPath(), "git-bug", selectFile)
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}
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