https://github.com/go-git/go-git/pull/939#issuecomment-1846981905

1--git-ops.txt

testing on 🌱 main +/- [⇣]
❯ grhh origin/main
HEAD is now at d12b384 update hello.txt

testing on 🌱 main +/-
❯ echo 'abc'>>hello.txt && gaa && gcmsg 'update hello.txt' && ggpush
[main a8c4ef6] update hello.txt
 1 file changed, 1 insertion(+)
Enumerating objects: 5, done.
Counting objects: 100% (5/5), done.
Writing objects: 100% (3/3), 256 bytes | 256.00 KiB/s, done.
Total 3 (delta 0), reused 0 (delta 0), pack-reused 0
To github.com:dhoizner/testing.git
   d12b384..a8c4ef6  main -> main

testing on 🌱 main +/-
❯ echo 'abc'>>hello.txt && gaa && gcmsg 'update hello.txt' && ggpush
[main 40a6225] update hello.txt
 1 file changed, 1 insertion(+)
Enumerating objects: 5, done.
Counting objects: 100% (5/5), done.
Writing objects: 100% (3/3), 256 bytes | 256.00 KiB/s, done.
Total 3 (delta 0), reused 0 (delta 0), pack-reused 0
To github.com:dhoizner/testing.git
   a8c4ef6..40a6225  main -> main

testing on 🌱 main +/-
❯ echo 'abc'>>hello.txt && gaa && gcmsg 'update hello.txt' && ggpush
[main 70ea39b] update hello.txt
 1 file changed, 1 insertion(+)
Enumerating objects: 5, done.
Counting objects: 100% (5/5), done.
Writing objects: 100% (3/3), 255 bytes | 255.00 KiB/s, done.
Total 3 (delta 0), reused 0 (delta 0), pack-reused 0
To github.com:dhoizner/testing.git
   40a6225..70ea39b  main -> main

testing on 🌱 main +/-
❯

2--pulls.txt

~/workspace/fun-with-go-git via 🐹 v1.21.1 took 1m52s
❯ go run main.go
cloned
head:  d12b38413440bcc718c590135175a3630f423a58
newline to pull, exit to exit
>
pulling
head:  a8c4ef6470f6f7b4cd2efecb6dd4337f71893d43
newline to pull, exit to exit
>
pulling
head:  a8c4ef6470f6f7b4cd2efecb6dd4337f71893d43
newline to pull, exit to exit
>
pulling
head:  70ea39ba35e16947e002c5c077e5985383000f5d
newline to pull, exit to exit
>

3--main.go

package main

import (
	"bufio"
	"context"
	"fmt"
	"os"
	"os/signal"

	"github.com/go-git/go-git/v5"
	"github.com/go-git/go-git/v5/plumbing/transport/ssh"
	ssh2 "golang.org/x/crypto/ssh"
)

func main() {
	if stat, err := os.Stat("./repos/testing"); err == nil && stat.IsDir() {
		if err := os.RemoveAll("./repos/testing"); err != nil {
			panic(err)
		}
	}
	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
	defer stop()

	keys, err := ssh.NewPublicKeysFromFile("git", "/Users/dan.hoizner/.ssh/id_ed25519", "")
	if err != nil {
		panic(err)
	}
	keys.HostKeyCallback = ssh2.InsecureIgnoreHostKey()

	repo, err := git.PlainCloneContext(ctx, "./repos/testing", false, &git.CloneOptions{
		URL:           "github.com:dhoizner/testing.git",
		SingleBranch:  true,
		ReferenceName: "refs/heads/main",
		Auth:          keys,
		Depth:         1,
	})
	if err != nil {
		panic(err)
	}
	fmt.Println("cloned")

	head, err := repo.Head()
	if err != nil {
		panic(err)
	}
	fmt.Println("head: ", head.Hash())

	reader := bufio.NewReader(os.Stdin)
	for {
		fmt.Printf("newline to pull, exit to exit\n> ")
		// in the meantime commit and push to the repo so there's smth to pull
		line, _, err := reader.ReadLine()
		if err != nil {
			panic(err)
		}
		if string(line) == "exit" {
			return
		}
		tree, err := repo.Worktree()
		if err != nil {
			panic(err)
		}
		fmt.Println("pulling")
		if err = tree.PullContext(ctx, &git.PullOptions{
			Auth: keys,
			// Depth:         100000,
			SingleBranch:  true,
			ReferenceName: "refs/heads/main",
			Force:         true,
		}); err != nil {
			panic(err)
		}

		head, err := repo.Head()
		if err != nil {
			panic(err)
		}

		fmt.Println("head: ", head.Hash())
	}
}

4--go.mod

module fun-with-go-git

go 1.21.1

require (
	github.com/go-git/go-git/v5 v5.10.1-0.20231127160659-861009f70a5b
	golang.org/x/crypto v0.16.0
)

require (
	dario.cat/mergo v1.0.0 // indirect
	github.com/Microsoft/go-winio v0.6.1 // indirect
	github.com/ProtonMail/go-crypto v0.0.0-20230828082145-3c4c8a2d2371 // indirect
	github.com/cloudflare/circl v1.3.3 // indirect
	github.com/cyphar/filepath-securejoin v0.2.4 // indirect
	github.com/emirpasic/gods v1.18.1 // indirect
	github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
	github.com/go-git/go-billy/v5 v5.5.0 // indirect
	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
	github.com/kevinburke/ssh_config v1.2.0 // indirect
	github.com/pjbgf/sha1cd v0.3.0 // indirect
	github.com/sergi/go-diff v1.1.0 // indirect
	github.com/skeema/knownhosts v1.2.1 // indirect
	github.com/xanzy/ssh-agent v0.3.3 // indirect
	golang.org/x/mod v0.12.0 // indirect
	golang.org/x/net v0.18.0 // indirect
	golang.org/x/sys v0.15.0 // indirect
	golang.org/x/tools v0.13.0 // indirect
	gopkg.in/warnings.v0 v0.1.2 // indirect
)