1 files changed, 60 insertions, 0 deletions
diff --git a/xml/version-diff.sh.in b/xml/version-diff.sh.in
new file mode 100644
index 0000000..1ece3b3
--- /dev/null
+++ b/xml/version-diff.sh.in
@@ -0,0 +1,60 @@
+#!@BASH_PATH@
+#
+# Copyright 2016-2023 the Pacemaker project contributors
+#
+# The version control history for this file may have further details.
+#
+# This source code is licensed under the GNU General Public License version 2
+# or later (GPLv2+) WITHOUT ANY WARRANTY.
+#
+
+# diff fails with ec=2 if no predecessor is found;
+# this uses '=' GNU extension to sed, if that's not available,
+# one can use: hline=`echo "$${p}" | grep -Fn "$${hunk}" | cut -d: -f1`;
+# XXX: use line information from hunk to avoid "not detected" for ambiguity
+for p in $*; do
+    set $(echo "$p" | tr '-' ' ')
+    echo "### *-$2.rng vs. predecessor"
+
+    for v in *-"$2".rng; do
+        echo "#### $v vs. predecessor"
+
+        b=$(echo "$v" | cut -d- -f1)
+        old=$(./best-match.sh "$b" "$1")
+        p=$(diff -u "$old" "$v" 2>/dev/null)
+
+        case $? in
+            1)
+                echo "$p" | sed -n -e '/^@@ /!d;=;p' -e ':l;n;/^\([- ]\|+.*<[^ />]\+\([^/>]\+="ID\|>$$\)\)/bl;s/^[+ ]\(.*\)/\1/p' |
+                while read -r hline; do
+                    if read -r h; then
+                        read -r i
+                    else
+                        break
+                    fi
+
+                    iline=$(grep -Fn "$i" "$v" | cut -d: -f1)
+
+                    if [ "$(echo "$iline" | wc -l)" = "1" ]; then
+                        ctxt=$({ sed -n -e "1,$((iline - 1))p" "$v"
+                                 echo "<inject id=\"GOAL\"/>$i"
+                                 sed -n -e "$((iline + 1)),$ p" "$v"
+                               } | xsltproc --param skip 1 context-of.xsl -)
+                    else
+                        ctxt="(not detected)"
+                    fi
+
+                    echo "$p" | sed -n -e "$((hline - 2)),$hline!d" -e '/^\(+++\|---\)/p'
+                    echo "$h context: $ctxt"
+                    echo "$p" | sed -n -e "1,${hline}d" -e '/^\(---\|@@ \)/be;p;d;:e;n;be'
+                done
+
+                ;;
+
+            2)
+                echo "##### $v has no predecessor"
+                ;;
+
+        esac
+    done
+done