Add a script to regenerate build.ninja.in files

Add regen_build_ninja_in.sh to regenerate build.ninja.in and
tests/test_tree/build.ninja.in.

Change-Id: Ib196576fb39eb1adf4ed660b7aa2d24c84aed077

regen_build_ninja_in.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+SRC=$(cd $(dirname $0) && pwd)
+OUT=/tmp/blueprint.$$
+
+rm -rf ${OUT}
+mkdir ${OUT}
+
+(
+  cd ${OUT}
+  ${SRC}/bootstrap.bash
+  ./blueprint.bash
+  ${SRC}/bootstrap.bash -r
+)
+
+rm -rf ${OUT}
+mkdir ${OUT}
+
+(
+  cd ${OUT}
+  cp -r ${SRC}/tests/test_tree test_tree
+  ln -s ${SRC} test_tree/blueprint
+  mkdir out
+  cd out
+
+  export SRCDIR=../test_tree
+  ${SRCDIR}/blueprint/bootstrap.bash
+  ./blueprint.bash
+  cp .minibootstrap/build.ninja.in ${SRC}/tests/test_tree/build.ninja.in
+)
+
+rm -rf ${OUT}

tests/test_tree_tests.sh

@@ -23,6 +23,7 @@ ${SRCDIR}/blueprint/bootstrap.bash
 
 if ! cmp -s ${SRCDIR}/build.ninja.in .minibootstrap/build.ninja.in; then
     echo "tests/test_tree/build.ninja.in and .minibootstrap/build.ninja.in should be the same" >&2
+    echo "run regen_build_ninja_in.sh" >&2
     exit 1
 fi