# HG changeset patch
# User Bryan O'Sullivan <bos@serpentine.com>
# Date 1175148117 25200
# Node ID c54f4c106fd514bcd0f87a970a0e87a4cda4dbd2
# Parent  edd2acc3dbabdb4bb8b40e794d5640713c2ac057
Record the version of Mercurial used.

diff -r edd2acc3dbab -r c54f4c106fd5 .hgignore
--- a/.hgignore	Wed Mar 28 22:55:13 2007 -0700
+++ b/.hgignore	Wed Mar 28 23:01:57 2007 -0700
@@ -6,6 +6,7 @@
 
 beta/*.tex
 build_id.tex
+hg_id.tex
 *.4[ct][ct]
 *.aux
 *.bbl
diff -r edd2acc3dbab -r c54f4c106fd5 en/00book.tex
--- a/en/00book.tex	Wed Mar 28 22:55:13 2007 -0700
+++ b/en/00book.tex	Wed Mar 28 23:01:57 2007 -0700
@@ -13,13 +13,14 @@
 
 \include{99defs}
 
-\title{Distributed revision control with Mercurial}
-\author{Bryan O'Sullivan}
+\title{Distributed revision control with Mercurial} \author{Bryan
+  O'Sullivan}
 \date{Copyright \copyright\ 2006, 2007 Bryan O'Sullivan.\\
   This material may be distributed only subject to the terms and
   conditions set forth in version 1.0 of the Open Publication License.
   Please refer to Appendix~\ref{cha:opl} for the license text.\\
-  This book was prepared from revision \input{build_id}.}
+  This book was prepared from revision \input{build_id} of its sources
+  using revision \input{hg_id} of Mercurial.}
 
 \makeindex
 
diff -r edd2acc3dbab -r c54f4c106fd5 en/Makefile
--- a/en/Makefile	Wed Mar 28 22:55:13 2007 -0700
+++ b/en/Makefile	Wed Mar 28 23:01:57 2007 -0700
@@ -1,7 +1,5 @@
 # This makefile requires GNU make.
 
-hg_id := $(shell hg parents --template '{node|short}\n')
-
 sources := \
 	00book.tex \
 	99book.bib \
@@ -12,6 +10,7 @@
 	concepts.tex \
 	daily.tex \
 	filenames.tex \
+	hg_id.tex \
 	hook.tex \
 	intro.tex \
 	mq.tex \
@@ -91,6 +90,13 @@
 	-output-directory $(dir $(1)) \
 	-jobname $(basename $(notdir $(1)))
 
+hg = $(shell which hg)
+
+hg-id = $(shell hg parents --template '{node|short}\n')
+
+hg-version = $(shell hg version -q | \
+		     sed 's,.*(version \(unknown\|[a-f0-9]*\)),\1,')
+
 all: pdf html
 
 pdf: pdf/hgbook.pdf
@@ -173,7 +179,10 @@
 	cd examples && ./run-example $(notdir $<)
 
 build_id.tex: $(wildcard ../.hg/00changelog.[id])
-	echo -n $(hg_id) > build_id.tex
+	echo -n $(hg-id) > build_id.tex
+
+hg_id.tex: $(hg)
+	echo -n $(hg-version) > hg_id.tex
 
 clean:
 	rm -rf dist html pdf \
@@ -181,7 +190,7 @@
 		$(image-dot:%.dot=%.png) \
 		$(image-svg:%.svg=%.pdf) \
 		$(image-svg:%.svg=%.png) \
-		examples/*.{lxo,run} examples/.run build_id.tex
+		examples/*.{lxo,run} examples/.run build_id.tex hg_id.tex
 
 install: pdf split $(dist-sources)
 	rm -rf dist