From 5b58619aa011c2047e7b67ca28630d8a2e72ca1f Mon Sep 17 00:00:00 2001
From: Jonathan Nieder <jrnieder@gmail.com>
Date: Sat, 31 Mar 2012 03:44:53 -0500
Subject: [PATCH] var doc: advertise current DEFAULT_PAGER and DEFAULT_EDITOR
 settings

Document the default pager and editor chosen at compile time in the
git-var(1) manpage so users curious about what command _this_ copy of
git will fall back to when EDITOR, VISUAL, and PAGER are unset can
find the answer quickly.

In builds leaving those settings uncustomized, this patch makes the
manpage continue to say "usually vi" and "usually less" so the
formatted documentation is usable for a wide audience including users
of custom builds that change those settings.  If you would like your
copy of the docs to be less noncommittal, you will need to set
DEFAULT_PAGER=less and DEFAULT_EDITOR=vi explicitly.

Suggested-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 Documentation/Makefile    | 10 ++++++++++
 Documentation/git-var.txt |  6 ++++++
 Makefile                  |  2 ++
 3 files changed, 18 insertions(+)

diff --git a/Documentation/Makefile b/Documentation/Makefile
index d40e211f2..9fee0b926 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -124,6 +124,16 @@ SHELL_PATH ?= $(SHELL)
 # Shell quote;
 SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
 
+ifdef DEFAULT_PAGER
+DEFAULT_PAGER_SQ = $(subst ','\'',$(DEFAULT_PAGER))
+ASCIIDOC_EXTRA += -a 'git-default-pager=$(DEFAULT_PAGER_SQ)'
+endif
+
+ifdef DEFAULT_EDITOR
+DEFAULT_EDITOR_SQ = $(subst ','\'',$(DEFAULT_EDITOR))
+ASCIIDOC_EXTRA += -a 'git-default-editor=$(DEFAULT_EDITOR_SQ)'
+endif
+
 #
 # Please note that there is a minor bug in asciidoc.
 # The version after 6.0.3 _will_ include the patch found here:
diff --git a/Documentation/git-var.txt b/Documentation/git-var.txt
index beef9e285..988a3234f 100644
--- a/Documentation/git-var.txt
+++ b/Documentation/git-var.txt
@@ -45,6 +45,9 @@ GIT_EDITOR::
     environment variable, then `core.editor` configuration, then
     `$VISUAL`, then `$EDITOR`, and then the default chosen at compile
     time, which is usually 'vi'.
+ifdef::git-default-editor[]
+    The build you are using chose '{git-default-editor}' as the default.
+endif::git-default-editor[]
 
 GIT_PAGER::
     Text viewer for use by git commands (e.g., 'less').  The value
@@ -52,6 +55,9 @@ GIT_PAGER::
     is the `$GIT_PAGER` environment variable, then `core.pager`
     configuration, then `$PAGER`, and then the default chosen at
     compile time (usually 'less').
+ifdef::git-default-pager[]
+    The build you are using chose '{git-default-pager}' as the default.
+endif::git-default-pager[]
 
 Diagnostics
 -----------
diff --git a/Makefile b/Makefile
index a78240930..394ac0854 100644
--- a/Makefile
+++ b/Makefile
@@ -2191,6 +2191,8 @@ $(XDIFF_LIB): $(XDIFF_OBJS)
 $(VCSSVN_LIB): $(VCSSVN_OBJS)
 	$(QUIET_AR)$(RM) $@ && $(AR) rcs $@ $(VCSSVN_OBJS)
 
+export DEFAULT_EDITOR DEFAULT_PAGER
+
 doc:
 	$(MAKE) -C Documentation all
 
-- 
2.26.2