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Documentation/git-pull: describe default behaviour and config interactions

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The way 'git pull' without explicit parameters work were not
explained well in any existing documentation.

Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano 2007-02-08 23:35:43 -08:00
parent 40facde06e
commit 9e2586ff2f
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Documentation/git-pull.txt
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@ -33,6 +33,60 @@ include::urls.txt[]
include::merge-strategies.txt[]
DEFAULT BEHAVIOUR
-----------------
Often people use `git pull` without giving any parameter.
Traditionally, this has been equivalent to saying `git pull
origin`. However, when configuration `branch.<name>.remote` is
present while on branch `<name>`, that value is used instead of
`origin`.
In order to determine what URL to use to fetch from, the value
of the configuration `remote.<origin>.url` is consulted
and if there is not any such variable, the value on `URL: ` line
in `$GIT_DIR/remotes/<origin>` file is used.
In order to determine what remote branches to fetch (and
optionally store in the tracking branches) when the command is
run without any refspec parameters on the command line, values
of the configuration variable `remote.<origin>.fetch` are
consulted, and if there aren't any, `$GIT_DIR/remotes/<origin>`
file is consulted and its `Pull: ` lines are used.
In addition to the refspec formats described in the OPTIONS
section, you can have a globbing refspec that looks like this:
------------
refs/heads/*:refs/remotes/origin/*
------------
A globbing refspec must have a non-empty RHS (i.e. must store
what were fetched in tracking branches), and its LHS and RHS
must end with `/*`. The above specifies that all remote
branches are tracked using tracking branches in
`refs/remotes/origin/` hierarchy under the same name.
The rule to determine which remote branch to merge after
fetching is a bit involved, in order not to break backward
compatibility.
If explicit refspecs were given on the command
line of `git pull`, they are all merged.
When no refspec was given on the command line, then `git pull`
uses the refspec from the configuration or
`$GIT_DIR/remotes/<origin>`. In such cases, the following
rules apply:
. If `branch.<name>.merge` configuration for the current
branch `<name>` exists, that is the name of the branch at the
remote site that is merged.
. If the refspec is a globbing one, nothing is merged.
. Otherwise the remote branch of the first refspec is merged.
EXAMPLES
--------