shape_patch(1) [xfree86 man page]

SHAPE_PATCH(1)						      General Commands Manual						    SHAPE_PATCH(1)

NAME

       shape_patch - shapeTools RMS generate patch file

SYNOPSIS

       shape patch OLDRELEASE=<name1> NEWRELEASE=<name2> [PATCHFILE=<filename>]

DESCRIPTION

       Shape  patch  generates	a patch file for updating $(OLDRELEASE) to $(NEWRELEASE). Both releases are identified by release names associated
       with the macros OLD-/NEWRELEASE on the command line. Valid release names are those generated by any of the shape_RMS (pre-)release building
       procedures  (see  shape_releas(1)).  Performing 'vl -all' with the release identification file as argument usually gives a good overview of
       existing release names.	Patch generation happens recursively over all subsystems being part of the current node. Hence,  triggering  shape
       patch from the top node of the central source repository creates a patch file for the whole system.

       The  output  of	shape patch is stored in a file named <name1>+2+<name2>.pat. When the PATCHFILE macro is set on the command line, $(PATCH-
       FILE) is taken as output file name instead.  Defining PATCHFILE=- on the command line causes the patch to be written  to  standard  output.
       Note:  For patches invoking multiple subsystems, $(PATCHFILE) should be set to an absolute pathname. If not, the patch generation procedure
       will leave an equally named patch file for each visited subsystem.

       The patch is constructed using the vdiff(1) command and can be applied to any installation of $(OLDRELEASE) by invoking patch(1).

INCONVENIENCES

       On System V machines, the generated patch file name will almost certainly exceed the 14 characters filename length limit.

SEE ALSO

       shape_releas(1), vdiff(1), patch(1)

FILES

       <name1>+2+<name2>.pat

2.10.119															    SHAPE_PATCH(1)

GIT-PATCH-ID(1) 						    Git Manual							   GIT-PATCH-ID(1)

NAME

       git-patch-id - Compute unique ID for a patch

SYNOPSIS

       git patch-id [--stable | --unstable]

DESCRIPTION

       Read a patch from the standard input and compute the patch ID for it.

       A "patch ID" is nothing but a sum of SHA-1 of the file diffs associated with a patch, with whitespace and line numbers ignored. As such,
       it's "reasonably stable", but at the same time also reasonably unique, i.e., two patches that have the same "patch ID" are almost
       guaranteed to be the same thing.

       IOW, you can use this thing to look for likely duplicate commits.

       When dealing with git diff-tree output, it takes advantage of the fact that the patch is prefixed with the object name of the commit, and
       outputs two 40-byte hexadecimal strings. The first string is the patch ID, and the second string is the commit ID. This can be used to make
       a mapping from patch ID to commit ID.

OPTIONS

       --stable
	   Use a "stable" sum of hashes as the patch ID. With this option:

	   o   Reordering file diffs that make up a patch does not affect the ID. In particular, two patches produced by comparing the same two
	       trees with two different settings for "-O<orderfile>" result in the same patch ID signature, thereby allowing the computed result
	       to be used as a key to index some meta-information about the change between the two trees;

	   o   Result is different from the value produced by git 1.9 and older or produced when an "unstable" hash (see --unstable below) is
	       configured - even when used on a diff output taken without any use of "-O<orderfile>", thereby making existing databases storing
	       such "unstable" or historical patch-ids unusable.

		   This is the default if patchid.stable is set to true.

       --unstable
	   Use an "unstable" hash as the patch ID. With this option, the result produced is compatible with the patch-id value produced by git 1.9
	   and older. Users with pre-existing databases storing patch-ids produced by git 1.9 and older (who do not deal with reordered patches)
	   may want to use this option.

	       This is the default.

GIT

       Part of the git(1) suite

Git 2.17.1							    10/05/2018							   GIT-PATCH-ID(1)