Hi all,

Using git 1.7.10.4

I find the behavior or documentation of "git clone  --single-branch"
confusing. Docs currently say:

man git-clone

       --single-branch
           Clone only the history leading to the tip of a single
branch, either specified by the --branch option or the primary branch
remote´┐Ż<80><99>s HEAD points
           at. When creating a shallow clone with the --depth option,
this is the default, unless --no-single-branch is given to fetch the
histories near
           the tips of all branches.

based onthis documentation, I cannot understand any of the results I
get when combining --depth and --singe-branch.

I start with this repo1 (for how to createin linux, see bottom):

git log --pretty=format:'%h-%s %d' --graph --decorate  --all
* 4565162-5  (foo)
* 20ce846-4
* a0615eb-3
* fa4131d-2
* f0683bd-1  (bar)
| * 432b5ec-m1  (HEAD, master)
|/
* 39df203-0

git clone repo1 repo2 --depth 1
cd repo2
git log --pretty=format:'%h-%s %d' --graph --decorate  --all
* 432b5ec-m1  (HEAD, origin/master, origin/HEAD, master)
* 39df203-0

# Why are branches "foo" and "bar" missing?

cd ..
git clone repo1 repo3 --depth 1 --branch foo
git log --pretty=format:'%h-%s %d' --graph --decorate  --all
* 4565162-5  (HEAD, origin/foo, foo)
* 20ce846-4
* a0615eb-3
* fa4131d-2
* f0683bd-1
| * 432b5ec-m1  (origin/master, origin/HEAD)
|/
* 39df203-0

# Why is --depth not having effect, and why is branch bar not there,
yet master is?

cd ..
git clone repo1 repo4 --depth 1 --branch foo --single-branch
git log --pretty=format:'%h-%s %d' --graph --decorate  --all
* 4565162-5  (HEAD, origin/foo, foo)
* 20ce846-4
* a0615eb-3
* fa4131d-2
* f0683bd-1
| * 432b5ec-m1  (origin/master, origin/HEAD)
|/
* 39df203-0

# Why is --depth not having effect, and why is branch master still there?

###################################
# Okay, so --depth seems to generally not work when cloning locally.
So maybe when doing so from github:

git clone https://github.com/git/git --depth 1
cd git
git log --pretty=format:'%h-%s %d' --graph --decorate  --all
* 7b6e784-Update draft release notes to 1.8.2  (HEAD, origin/master,
origin/HEAD, master)
* 17e45f8-Merge branch
'wk/man-deny-current-branch-is-default-these-days'  (grafted)
git branch -a
* master
  remotes/origin/HEAD -> origin/master
  remotes/origin/master
git tag
>

# Why don't other branches appear here?
# Hm, I'll add "--branch master" to the command

git clone https://github.com/git/git git3 --depth 1 --branch master
cd git3
git branch -a
* master
  remotes/origin/HEAD -> origin/master
  remotes/origin/master
  remotes/origin/next
  remotes/origin/pu
  remotes/origin/todo
git tag
> gitgui-0.10.0
> gitgui-0.10.1
> gitgui-0.10.2
> ...

# And why DO they appear here? Why do I now get all tags?
# Same result for --branch next
# okay, let's try adding --single-branch

git clone https://github.com/git/git git4 --depth 1 --branch next
--single-branch
cd git4
git branch -a
* next
  remotes/origin/next
  remotes/origin/pu
  remotes/origin/todo

# Now I don't get master, but I still get those other branches??? And also tags?


Now I am aware that a bug was fixed in git 1.8.0:
https://raw.github.com/gitster/git/master/Documentation/RelNotes/1.8.0.txt

 * A repository created with "git clone --single" had its fetch
   refspecs set up just like a clone without "--single", leading the
   subsequent "git fetch" to slurp all the other branches, defeating
   the whole point of specifying "only this branch".


But even considering that bug (and assuming it also affected git clone),
the results I get for 1.7.10.4 seem all weird, and not really
following the documentation.


So I am sorry I cannot phrase this as a single question, as the
results are not consistent with each other or the documentation, and
those results seem to be related.

cheers,
  Thibault Kruse




How to create local repo1:

mkdir repo1
cd repo1
git init
echo 0 >> foo.txt
git add foo.txt
git commit -m 0
git co master -b bar
echo 1 >> bar.txt
git add bar.txt
git commit -m 1
git co bar -b foo
echo 2 >> foo.txt
git add foo.txt
git commit -m 2
echo 3 >> foo.txt
git add foo.txt
git commit -m 3
echo 4 >> foo.txt
git add foo.txt
git commit -m 4
echo 5 >> foo.txt
git add foo.txt
git commit -m 5
git co master
echo 1 > master.txt
git add master.txt
git commit -m m1
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