docs: rework check-docs test script

Try to make check-docs.sh script more readable.

Also, previously the script would check that one side was a subset
of the other side. Tighten this check up, now both sides of the
comparison must agree and yield the same lines.

(cherry picked from commit 7a59cd2744)

tools/check-docs.sh

@@ -1,22 +1,48 @@
-#!/bin/sh
+#!/bin/bash
 
-SOURCEDIR=$1
+set -e
+
+die() {
+    printf '%s\n' "$@" >&2
+    exit 1
+}
+
+word_regex() {
+    tr '\n|<>\\' ' ' \
+    | sed -e 's, *$,\\>,' \
+          -e 's,^ *,\\<,' \
+          -e 's, \+,\\>\\|\\<,g'
+}
+
+same_lines() {
+    diff <(printf "%s\n" "$1"          | sed '/^$/d' | sort) \
+         <(printf "%s\n%s\n" "$2" "$3" | sed '/^$/d' | sort) >&2
+}
+
+SOURCEDIR="$1"
 [ -n "$SOURCEDIR" ] && SOURCEDIR="$SOURCEDIR/"
 
 # Check that the D-Bus API docs contain all known interfaces
-if (sed -n 's/.*<xi:include href="dbus-\(.*\.xml\)".*/\1\n\1/p' $SOURCEDIR''docs/api/network-manager-docs.xml;
+F1="$(sed -n 's,^      <xi:include href="dbus-\([^"]*\.xml\)"/>$,\1,p' "$SOURCEDIR"docs/api/network-manager-docs.xml)"
-    cd $SOURCEDIR''introspection; ls *.xml) |sort |uniq -u| grep . >&2; then
+F2="$(cd "$SOURCEDIR"introspection; ls -1 *.xml)"
-	echo "*** Error: D-Bus interfaces not included in docs/api/network-manager-docs.xml ***" >&2
+if ! same_lines "$F1" "$F2" ; then
-	exit 1
+    die "*** Error: D-Bus interfaces not included in docs/api/network-manager-docs.xml ***"
 fi
 
 # Check that files that define types that are in public libnm API are included in libnm documentation.
-# Don't complain about readability or I'll rewrite this in Perl.
+F1="$(sed -n 's/.*<xi:include href="xml\/\([^"]*\)\.xml".*/\1/p' "$SOURCEDIR"docs/libnm/libnm-docs.xml)"
-if (sed -n 's/.*<xi:include href="\(xml\/.*\.xml\)".*/\1\n\1/p' $SOURCEDIR''docs/libnm/libnm-docs.xml;
+F2="$(grep -l "$(sed -n 's/^[\t ]*\(.*_get_type\);/\1/p' "$SOURCEDIR"libnm/libnm.ver | word_regex)" \
-    grep -lE "$(sed -n 's/^[\t ]*\(.*_get_type\);/\1/p' $SOURCEDIR''libnm/libnm.ver |xargs echo |sed 's/ /|/g')" $SOURCEDIR''libnm/*.h $SOURCEDIR''libnm-core/*.h |
+           "$SOURCEDIR"libnm/*.h \
-    sed 's,.*/,xml/,;s/\.h$/.xml/') |sort |uniq -u| grep . >&2; then
+           "$SOURCEDIR"libnm-core/*.h \
-	echo "*** Error: libnm classes not included in docs/libnm/libnm-docs.xml ***" >&2
+      | sed 's,.*/\([^/]\+\)\.h$,\1,')"
-	exit 1
+F2_EXTRA="
+annotation-glossary
+api-index-full
+nm-dbus-interface
+nm-errors
+nm-utils
+nm-version
+"
+if ! same_lines "$F1" "$F2" "$F2_EXTRA"; then
+    die "*** Error: libnm classes not included in docs/libnm/libnm-docs.xml ***"
 fi
-
-exit 0