merge(3p/git): Merge git upstream at v2.26.2 r/808

1 files changed, 39 insertions, 1 deletions

diff --git a/third_party/git/Documentation/git-fast-import.txt b/third_party/git/Documentation/git-fast-import.txt
index fad327aecc..7889f95940 100644
--- a/third_party/git/Documentation/git-fast-import.txt
+++ b/third_party/git/Documentation/git-fast-import.txt
@@ -51,6 +51,21 @@ OPTIONS
 	memory used by fast-import during this run.  Showing this output
 	is currently the default, but can be disabled with --quiet.
 
+--allow-unsafe-features::
+	Many command-line options can be provided as part of the
+	fast-import stream itself by using the `feature` or `option`
+	commands. However, some of these options are unsafe (e.g.,
+	allowing fast-import to access the filesystem outside of the
+	repository). These options are disabled by default, but can be
+	allowed by providing this option on the command line.  This
+	currently impacts only the `export-marks`, `import-marks`, and
+	`import-marks-if-exists` feature commands.
++
+	Only enable this option if you trust the program generating the
+	fast-import stream! This option is enabled automatically for
+	remote-helpers that use the `import` capability, as they are
+	already trusted to run their own code.
+
 Options for Frontends
 ~~~~~~~~~~~~~~~~~~~~~
 
@@ -337,6 +352,13 @@ and control the current import process.  More detailed discussion
 	`commit` command.  This command is optional and is not
 	needed to perform an import.
 
+`alias`::
+	Record that a mark refers to a given object without first
+	creating any new object.  Using --import-marks and referring
+	to missing marks will cause fast-import to fail, so aliases
+	can provide a way to set otherwise pruned commits to a valid
+	value (e.g. the nearest non-pruned ancestor).
+
 `checkpoint`::
 	Forces fast-import to close the current packfile, generate its
 	unique SHA-1 checksum and index, and start a new packfile.
@@ -391,7 +413,7 @@ change to the project.
 	('encoding' SP <encoding>)?
 	data
 	('from' SP <commit-ish> LF)?
-	('merge' SP <commit-ish> LF)?
+	('merge' SP <commit-ish> LF)*
 	(filemodify | filedelete | filecopy | filerename | filedeleteall | notemodify)*
 	LF?
 ....
@@ -774,6 +796,7 @@ lightweight (non-annotated) tags see the `reset` command below.
 
 ....
 	'tag' SP <name> LF
+	mark?
 	'from' SP <commit-ish> LF
 	original-oid?
 	'tagger' (SP <name>)? SP LT <email> GT SP <when> LF
@@ -913,6 +936,21 @@ a data chunk which does not have an LF as its last byte.
 +
 The `LF` after `<delim> LF` is optional (it used to be required).
 
+`alias`
+~~~~~~~
+Record that a mark refers to a given object without first creating any
+new object.
+
+....
+	'alias' LF
+	mark
+	'to' SP <commit-ish> LF
+	LF?
+....
+
+For a detailed description of `<commit-ish>` see above under `from`.
+
+
 `checkpoint`
 ~~~~~~~~~~~~
 Forces fast-import to close the current packfile, start a new one, and to