mirror of
https://github.com/go-gitea/gitea.git
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72 lines
2.4 KiB
Go
72 lines
2.4 KiB
Go
// Copyright 2025 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package gitrepo
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import (
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"context"
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"fmt"
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"strconv"
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"strings"
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"gitea.dev/modules/git/gitcmd"
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)
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// DivergeObject represents commit count diverging commits
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type DivergeObject struct {
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Ahead int
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Behind int
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}
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// GetDivergingCommits returns the number of commits a targetBranch is ahead or behind a baseBranch
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func GetDivergingCommits(ctx context.Context, repo Repository, baseBranch, targetBranch string) (*DivergeObject, error) {
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cmd := gitcmd.NewCommand("rev-list", "--count", "--left-right").
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AddDynamicArguments(baseBranch + "..." + targetBranch).AddArguments("--")
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stdout, _, err1 := RunCmdString(ctx, repo, cmd)
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if err1 != nil {
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return nil, err1
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}
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left, right, found := strings.Cut(strings.Trim(stdout, "\n"), "\t")
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if !found {
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return nil, fmt.Errorf("git rev-list output is missing a tab: %q", stdout)
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}
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behind, err := strconv.Atoi(left)
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if err != nil {
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return nil, err
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}
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ahead, err := strconv.Atoi(right)
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if err != nil {
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return nil, err
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}
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return &DivergeObject{Ahead: ahead, Behind: behind}, nil
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}
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// GetCommitIDsBetweenReverse returns the last commit IDs between two commits in reverse order (from old to new) with limit.
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// If the result exceeds the limit, the old commits IDs will be ignored
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func GetCommitIDsBetweenReverse(ctx context.Context, repo Repository, startRef, endRef, notRef string, limit int) ([]string, error) {
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genCmd := func(reversions ...string) *gitcmd.Command {
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cmd := gitcmd.NewCommand("rev-list", "--reverse").
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AddArguments("-n").AddDynamicArguments(strconv.Itoa(limit)).
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AddDynamicArguments(reversions...)
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if notRef != "" { // --not should be kept as the last parameter of git command, otherwise the result will be wrong
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cmd.AddOptionValues("--not", notRef)
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}
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return cmd
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}
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stdout, _, err := RunCmdString(ctx, repo, genCmd(startRef+".."+endRef))
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// example git error message: fatal: origin/main..HEAD: no merge base
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if err != nil && strings.Contains(err.Stderr(), "no merge base") {
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// future versions of git >= 2.28 are likely to return an error if before and last have become unrelated.
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// previously it would return the results of git rev-list before last so let's try that...
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stdout, _, err = RunCmdString(ctx, repo, genCmd(startRef, endRef))
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}
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if err != nil {
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return nil, err
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}
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commitIDs := strings.Fields(strings.TrimSpace(stdout))
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return commitIDs, nil
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}
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