When I get the log of a GIT repo:
git log --oneline --decorate --graph
the output is like this:
* 44025ed (HEAD -> master) second commit
* adf2dbb first commmit
In another repo, when I git log
, I get:
* 435b61d (HEAD,master) bar
* 9773e52 foo
What is the difference between (HEAD -> master)
and (HEAD,master)
An arrow to the right of HEAD
, in the output of git log --oneline --decorate --graph
, indicates which branch (if any) is the current one.
* 44025ed (HEAD -> master) second commit
means that the symbolic reference HEAD
currently points to the master
branch; in other words, you are not in detached-HEAD state, and the current branch is master
.
In contrast,
* 44025ed (HEAD, master) second commit
means that the symbolic reference HEAD
does not currently point to any branch, but to a commit ( 44025ed
) directly; in other words, you are in detached-HEAD state. The master
branch is only listed alongside HEAD
because it happens to point to the same commit ( 44025ed
).
For information, this distinction was introduced in Git (2.4) shortly after Can git log --decorate unambiguously tell me whether the HEAD is detached? was asked on Stack Overflow.
$ mkdir decorate-test
$ cd decorate-test/
$ git init
Initialized empty Git repository in /xxxxxxx/decorate-test/.git/
$ touch README
$ git add README
$ git commit -m "Add README"
[master (root-commit) 50781c9] Add README
1 file changed, 0 insertions(+), 0 deletions(-)
create mode 100644 README
$ git log --oneline --decorate --graph
* 50781c9 (HEAD -> master) Add README
# Note the presence of the arrow in the output.
# Now, check out the commit directly to detach the HEAD:
$ git checkout 50781c9
Note: checking out '50781c9'.
You are in 'detached HEAD' state. You can look around, ...
HEAD is now at 50781c9... Add README
$ git log --oneline --decorate --graph
* 50781c9 (HEAD, master) Add README
# The arrow is gone!
# Check out master again to reattach the HEAD:
$ git checkout master
Switched to branch 'master'
$ git log --oneline --decorate --graph
* 50781c9 (HEAD -> master) Add README
# The arrow is back!
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