From 3f8b0a2bbd87017750199949bfd61dd99dde34f1 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 3 Oct 2011 08:15:24 +0200
Subject: Add script for automatic re-numbering of sections in documentation

---
 doc/shift-section.sh | 118 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100755 doc/shift-section.sh

diff --git a/doc/shift-section.sh b/doc/shift-section.sh
new file mode 100755
index 0000000..9787189
--- /dev/null
+++ b/doc/shift-section.sh
@@ -0,0 +1,118 @@
+#! /usr/bin/env bash
+
+# Shift a section in the ODB manual. This is normally necessary when
+# you need to insert new content at a specific place. For example,
+# you may have sections 10.1 10.2, and 10.3 and you need to insert a
+# new 10.2 section and shift the old 10.2 to 10.3 and the old 10.3
+# to 10.4. To accomplish this, performs the following steps:
+#
+# 1. Commit or stage existing changes to the manual.
+# 2. Run 'shift-section.sh -p 10 -l 3 -h 3 manual.xhtml' Note that
+#    you should always start from the last section you need to shift
+#    and work your way backwards.
+# 3. Review the changes with diff or gitk, make sure the script didn't
+#    mess up. Note that the script is KNOWN TO MESS UP sometimes so this
+#    step if not optional. If everything is good, stage the changes and
+#    repeat steps 2-3 for the next section.
+#
+# If you need to shift a lot of leaf sections (i.e., sections that do
+# not have sub-sections, then you can try to do the whole thing in one
+# step. However, catching script errors will be harder. For example:
+#
+# shift-section.sh -p 10.4 -l 8 -h 23 manual.xhtml
+#
+# -p <section-prefix>
+# -l <low-bound>
+# -h <high-bound>
+#
+
+function error ()
+{
+  echo "$*" 1>&2
+}
+
+prefix=
+low=
+high=
+usage="$0 -p <section-prefix> -l <low-bound> -h <high-bound> manual.xhtml"
+
+while [ $# -gt 0 ]; do
+  case $1 in
+    -p)
+      shift
+      prefix="$1"
+      shift
+      ;;
+    -l)
+      shift
+      low="$1"
+      shift
+      ;;
+    -h)
+      shift
+      high="$1"
+      shift
+      ;;
+    -*)
+      error "unknown option: $1"
+      exit 1
+      ;;
+    *)
+      break
+      ;;
+  esac
+done
+
+if [ "$low" = "" ]; then
+  error "low bound is not specified"
+  error $usage
+  exit 1
+fi
+
+if [ "$high" = "" ]; then
+  error "high bound is not specified"
+  error $usage
+  exit 1
+fi
+
+if [ "$1" = "" ]; then
+  error "document is not specified"
+  error $usage
+  exit 1
+fi
+
+for (( i=$high; i>=$low; i-- )); do
+
+  if [ "$prefix" != "" ]; then
+    old="$prefix."
+    new="$prefix."
+  fi
+
+  old="$old$i"
+  new="$new$((i+1))"
+
+  # Escape periods in the old section names.
+  #
+  eold=`echo $old | sed -e 's/\./\\\\./g'`
+
+  #echo "$eold"
+  #echo "$new"
+
+  sed -e 's/\([># "]\)'"$eold/\1$new/g" $1 >$1.shifted
+
+  if [ "$?" != 0 ]; then
+    rm -f $1.shifted
+    exit 1
+  fi
+
+  cmp -s $1 $1.shifted
+
+  if [ "$?" != 0 ]; then
+    mv $1.shifted $1
+  else
+    rm $1.shifted
+    error "document unchanged on step $old -> $new"
+    exit 1
+  fi
+
+done
-- 
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