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package main
import (
"fmt"
"os"
"os/exec"
"strings"
"git.mothstuff.lol/lukeshu/eclipse/lib/gitcache"
)
var gitFetched = map[string]struct{}{}
var gitCache = &gitcache.Cache{
Dir: ".git-cache",
}
func withGit(u string, fn func(dir string) error) error {
if _, ok := gitFetched[u]; !ok {
if err := gitCache.Fetch(os.Stderr, u); err != nil {
return err
}
}
return gitCache.WithFastClone(os.Stderr, u, fn)
}
func getGitTagThatContainsAll(gitURL string, gitHashes ...string) (string, error) {
if len(gitHashes) == 0 {
return "", nil
}
var tag string
err := withGit(gitURL, func(dir string) error {
gitHash := gitHashes[0]
if len(gitHashes) > 1 {
cmdline := append([]string{"git", "merge-base", "--independent", "--"}, gitHashes...)
cmd := exec.Command(cmdline[0], cmdline[1:]...)
cmd.Dir = dir
var stdout strings.Builder
cmd.Stdout = &stdout
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
return err
}
gitHash = strings.TrimSpace(stdout.String())
}
cmd := exec.Command("git", "for-each-ref",
"--count=1",
"--format=%(refname:lstrip=2)",
"--contains="+gitHash,
"refs/tags/",
)
cmd.Dir = dir
var stdout strings.Builder
cmd.Stdout = &stdout
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
return err
}
tag = strings.TrimSpace(stdout.String())
return nil
})
if err != nil {
return "", fmt.Errorf("%q: %w", gitURL, err)
}
return tag, nil
}
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