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Patrick Palka fc637f04c7 Add option to remove duplicate command history entries 
This patch implements the new option "history remove-duplicates", which
controls the removal of duplicate history entries ("off" by default).

The motivation for this option is to be able to reduce the prevalence of
basic commands such as "up" and "down" in the history file.  These
common commands crowd out more unique commands in the history file (when
the history file has a fixed size), and they make navigation of the
history file via ^P, ^N and ^R more inconvenient.

The option takes an integer denoting the number of history entries to
look back at for a history entry that is a duplicate of the latest one.
"history remove-duplicates 1" is equivalent to bash's ignoredups option,
and "history remove-duplicates unlimited" is equivalent to bash's
erasedups option.

[ I decided to go with this integer approach instead of a tri-state enum
  because it's slightly more flexible and seemingly more intuitive than
  leave/erase/ignore.  ]

gdb/ChangeLog:

	* NEWS: Mention the new option "history remove-duplicates".
	* top.c (history_remove_duplicates): New static variable.
	(show_history_remove_duplicates): New static function.
	(gdb_add_history): Conditionally remove duplicate history
	entries.
	(init_main): Add "history remove-duplicates" option.

gdb/doc/ChangeLog:

	* gdb.texinfo (Command History): Document the new option
	"history remove-duplicates".

gdb/testsuite/ChangeLog:

	* gdb.base/history-duplicates.exp: New test.
2015-06-26 11:05:56 -04:00
..
a4rc.sed
agentexpr.texi [gdb/ax] small "setv" fix and documentation's adjustment. 2015-02-19 19:04:16 +04:00
all-cfg.texi Update year range in copyright notice of all files owned by the GDB project. 2015-01-01 13:32:14 +04:00
annotate.texinfo Update year range in copyright notice of all files owned by the GDB project. 2015-01-01 13:32:14 +04:00
ChangeLog Add option to remove duplicate command history entries 2015-06-26 11:05:56 -04:00
doxy-index.in Update year range in copyright notice of all files owned by the GDB project. 2015-01-01 13:32:14 +04:00
Doxyfile-base.in Update year range in copyright notice of all files owned by the GDB project. 2015-01-01 13:32:14 +04:00
Doxyfile-gdb-api.in Update year range in copyright notice of all files owned by the GDB project. 2015-01-01 13:32:14 +04:00
Doxyfile-gdb-xref.in Update year range in copyright notice of all files owned by the GDB project. 2015-01-01 13:32:14 +04:00
Doxyfile-gdbserver.in Update year range in copyright notice of all files owned by the GDB project. 2015-01-01 13:32:14 +04:00
fdl.texi
filter-for-doxygen Add Doxygen support to GDB 2014-02-10 19:10:34 -08:00
filter-params.pl Add Doxygen support to GDB 2014-02-10 19:10:34 -08:00
gdb.texinfo Add option to remove duplicate command history entries 2015-06-26 11:05:56 -04:00
gpl.texi
guile.texi Add support for unbuffered and zero sized Guile ports. 2015-05-16 12:14:26 -07:00
lpsrc.sed
Makefile.in Update year range in copyright notice of all files owned by the GDB project. 2015-01-01 13:32:14 +04:00
observer.texi Update year range in copyright notice of all files owned by the GDB project. 2015-01-01 13:32:14 +04:00
psrc.sed
python.texi Clarify doc about memory read/write and non-8-bits addressable memory unit sizes 2015-06-15 15:31:00 -04:00
refcard.tex Update year range in copyright notice of all files owned by the GDB project. 2015-01-01 13:32:14 +04:00
stabs.texinfo Remove special support in gdb for Sun's version of stabs. 2015-06-19 11:34:43 -07:00
stack_frame.eps
stack_frame.pdf
stack_frame.png
stack_frame.svg
stack_frame.txt