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-rw-r--r--Documentation/config.txt8
-rw-r--r--Documentation/git-branch.txt10
-rw-r--r--Documentation/git-checkout.txt7
-rw-r--r--Documentation/git-read-tree.txt11
-rw-r--r--Documentation/git-rev-parse.txt7
-rw-r--r--Documentation/git-update-ref.txt28
-rw-r--r--Documentation/git-write-tree.txt8
-rw-r--r--Documentation/repository-layout.txt11
8 files changed, 84 insertions, 6 deletions
diff --git a/Documentation/config.txt b/Documentation/config.txt
index d1a4bec0d4..e178ee2de1 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -70,6 +70,14 @@ core.preferSymlinkRefs::
This is sometimes needed to work with old scripts that
expect HEAD to be a symbolic link.
+core.logAllRefUpdates::
+ If true, `git-update-ref` will append a line to
+ "$GIT_DIR/logs/<ref>" listing the new SHA1 and the date/time
+ of the update. If the file does not exist it will be
+ created automatically. This information can be used to
+ determine what commit was the tip of a branch "2 days ago".
+ This value is false by default (no logging).
+
core.repositoryFormatVersion::
Internal variable identifying the repository format and layout
version.
diff --git a/Documentation/git-branch.txt b/Documentation/git-branch.txt
index 0b37e2bfc8..d43ef1dec4 100644
--- a/Documentation/git-branch.txt
+++ b/Documentation/git-branch.txt
@@ -9,7 +9,7 @@ SYNOPSIS
--------
[verse]
'git-branch' [-r]
-'git-branch' [-f] <branchname> [<start-point>]
+'git-branch' [-l] [-f] <branchname> [<start-point>]
'git-branch' (-d | -D) <branchname>...
DESCRIPTION
@@ -23,7 +23,8 @@ If no <start-point> is given, the branch will be created with a head
equal to that of the currently checked out branch.
With a `-d` or `-D` option, `<branchname>` will be deleted. You may
-specify more than one branch for deletion.
+specify more than one branch for deletion. If the branch currently
+has a ref log then the ref log will also be deleted.
OPTIONS
@@ -34,6 +35,11 @@ OPTIONS
-D::
Delete a branch irrespective of its index status.
+-l::
+ Create the branch's ref log. This activates recording of
+ all changes to made the branch ref, enabling use of date
+ based sha1 expressions such as "<branchname>@{yesterday}".
+
-f::
Force the creation of a new branch even if it means deleting
a branch that already exists with the same name.
diff --git a/Documentation/git-checkout.txt b/Documentation/git-checkout.txt
index d82efc00d4..fbdbadc74f 100644
--- a/Documentation/git-checkout.txt
+++ b/Documentation/git-checkout.txt
@@ -8,7 +8,7 @@ git-checkout - Checkout and switch to a branch
SYNOPSIS
--------
[verse]
-'git-checkout' [-f] [-b <new_branch>] [-m] [<branch>]
+'git-checkout' [-f] [-b <new_branch> [-l]] [-m] [<branch>]
'git-checkout' [-m] [<branch>] <paths>...
DESCRIPTION
@@ -40,6 +40,11 @@ OPTIONS
by gitlink:git-check-ref-format[1]. Some of these checks
may restrict the characters allowed in a branch name.
+-l::
+ Create the new branch's ref log. This activates recording of
+ all changes to made the branch ref, enabling use of date
+ based sha1 expressions such as "<branchname>@{yesterday}".
+
-m::
If you have local modifications to one or more files that
are different between the current branch and the branch to
diff --git a/Documentation/git-read-tree.txt b/Documentation/git-read-tree.txt
index 844cfda8d2..1f21d95684 100644
--- a/Documentation/git-read-tree.txt
+++ b/Documentation/git-read-tree.txt
@@ -8,7 +8,7 @@ git-read-tree - Reads tree information into the index
SYNOPSIS
--------
-'git-read-tree' (<tree-ish> | [[-m [--aggressive]| --reset] [-u | -i]] <tree-ish1> [<tree-ish2> [<tree-ish3>]])
+'git-read-tree' (<tree-ish> | [[-m [--aggressive] | --reset | --prefix=<prefix>] [-u | -i]] <tree-ish1> [<tree-ish2> [<tree-ish3>]])
DESCRIPTION
@@ -63,6 +63,15 @@ OPTIONS
* when both sides adds a path identically. The resolution
is to add that path.
+--prefix=<prefix>/::
+ Keep the current index contents, and read the contents
+ of named tree-ish under directory at `<prefix>`. The
+ original index file cannot have anything at the path
+ `<prefix>` itself, and have nothing in `<prefix>/`
+ directory. Note that the `<prefix>/` value must end
+ with a slash.
+
+
<tree-ish#>::
The id of the tree object(s) to be read/merged.
diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt
index ab896fcf83..b894694367 100644
--- a/Documentation/git-rev-parse.txt
+++ b/Documentation/git-rev-parse.txt
@@ -124,6 +124,13 @@ syntax.
happen to have both heads/master and tags/master, you can
explicitly say 'heads/master' to tell git which one you mean.
+* A suffix '@' followed by a date specification enclosed in a brace
+ pair (e.g. '\{yesterday\}', '\{1 month 2 weeks 3 days 1 hour 1
+ second ago\}' or '\{1979-02-26 18:30:00\}') to specify the value
+ of the ref at a prior point in time. This suffix may only be
+ used immediately following a ref name and the ref must have an
+ existing log ($GIT_DIR/logs/<ref>).
+
* A suffix '{caret}' to a revision parameter means the first parent of
that commit object. '{caret}<n>' means the <n>th parent (i.e.
'rev{caret}'
diff --git a/Documentation/git-update-ref.txt b/Documentation/git-update-ref.txt
index 475237f19e..e062030e91 100644
--- a/Documentation/git-update-ref.txt
+++ b/Documentation/git-update-ref.txt
@@ -7,7 +7,7 @@ git-update-ref - update the object name stored in a ref safely
SYNOPSIS
--------
-'git-update-ref' <ref> <newvalue> [<oldvalue>]
+'git-update-ref' [-m <reason>] <ref> <newvalue> [<oldvalue>]
DESCRIPTION
-----------
@@ -49,6 +49,32 @@ for reading but not for writing (so we'll never write through a
ref symlink to some other tree, if you have copied a whole
archive by creating a symlink tree).
+Logging Updates
+---------------
+If config parameter "core.logAllRefUpdates" is true or the file
+"$GIT_DIR/logs/<ref>" exists then `git-update-ref` will append
+a line to the log file "$GIT_DIR/logs/<ref>" (dereferencing all
+symbolic refs before creating the log name) describing the change
+in ref value. Log lines are formatted as:
+
+ . oldsha1 SP newsha1 SP committer LF
++
+Where "oldsha1" is the 40 character hexadecimal value previously
+stored in <ref>, "newsha1" is the 40 character hexadecimal value of
+<newvalue> and "committer" is the committer's name, email address
+and date in the standard GIT committer ident format.
+
+Optionally with -m:
+
+ . oldsha1 SP newsha1 SP committer TAB message LF
++
+Where all fields are as described above and "message" is the
+value supplied to the -m option.
+
+An update will fail (without changing <ref>) if the current user is
+unable to create a new log file, append to the existing log file
+or does not have committer information available.
+
Author
------
Written by Linus Torvalds <torvalds@osdl.org>.
diff --git a/Documentation/git-write-tree.txt b/Documentation/git-write-tree.txt
index 77e12cb949..c85fa89c30 100644
--- a/Documentation/git-write-tree.txt
+++ b/Documentation/git-write-tree.txt
@@ -8,7 +8,7 @@ git-write-tree - Creates a tree object from the current index
SYNOPSIS
--------
-'git-write-tree' [--missing-ok]
+'git-write-tree' [--missing-ok] [--prefix=<prefix>/]
DESCRIPTION
-----------
@@ -30,6 +30,12 @@ OPTIONS
directory exist in the object database. This option disables this
check.
+--prefix=<prefix>/::
+ Writes a tree object that represents a subdirectory
+ `<prefix>`. This can be used to write the tree object
+ for a subproject that is in the named subdirectory.
+
+
Author
------
Written by Linus Torvalds <torvalds@osdl.org>
diff --git a/Documentation/repository-layout.txt b/Documentation/repository-layout.txt
index 98fbe7db52..b52dfdc308 100644
--- a/Documentation/repository-layout.txt
+++ b/Documentation/repository-layout.txt
@@ -128,3 +128,14 @@ remotes::
Stores shorthands to be used to give URL and default
refnames to interact with remote repository to `git
fetch`, `git pull` and `git push` commands.
+
+logs::
+ Records of changes made to refs are stored in this
+ directory. See the documentation on git-update-ref
+ for more information.
+
+logs/refs/heads/`name`::
+ Records all changes made to the branch tip named `name`.
+
+logs/refs/tags/`name`::
+ Records all changes made to the tag named `name`.