1 files changed, 80 insertions, 0 deletions
diff --git a/scripts/cheatmake b/scripts/cheatmake
new file mode 100755
index 00000000..9659a6cc
--- /dev/null
+++ b/scripts/cheatmake
@@ -0,0 +1,80 @@
+#!/bin/sh
+# Helper for saving time when recompiling, skipping files that haven't
+# changed in a meaningful way (e.g. if you only change a comment...)
+#
+# LGPL v2, David Faure <david@mandrakesoft.com>
+
+usage()
+{
+  echo "Usage:"
+  echo " $0 hidechange file    Hides the fact that file was changed (use with care!)"
+  echo " $0 show               Lists what make currently has to rebuild"
+  echo " $0 why file           Explains why make must rebuild file"
+  exit 1;
+}
+
+if [ $# -eq 0 ]; then usage; fi
+CDPATH=
+builddir=$PWD
+
+# 'srcdir != builddir' stuff
+if test ! -f Makefile && test -n "$OBJ_SUBDIR"; then
+  builddir=$OBJ_SUBDIR
+else
+  if test ! -f Makefile && test -n "$OBJ_REPLACEMENT"; then
+     builddir=`pwd | sed -e "$OBJ_REPLACEMENT"`
+  fi
+fi
+
+if test ! -f Makefile && test -n "$OBJ_SUBDIR"; then
+   builddir=$OBJ_SUBDIR
+fi
+cd $builddir
+srcdir=`egrep '^srcdir *=' Makefile | sed -e "s#srcdir *= *##"`
+UNSERMAKE=`type -p unsermake`
+using_unsermake=
+if head -n 1 Makefile | grep unsermake >/dev/null; then
+    using_unsermake=new
+fi
+if head -n 1 Makefile | grep automake >/dev/null; then
+    using_unsermake=old
+fi
+
+
+case $1 in
+  hidechange )
+    if [ $# -ne 2 ]; then usage; fi
+    ## TODO: unsermake support (or support in unsermake itself)
+    deps=`make SUBDIRS='' -n | grep '\-o' | sed -e 's/.*-o \([^ ]*\).*/\1/'`;
+    if [ -n "$deps" ]; then
+      oldestdep=`ls -t $deps 2>/dev/null | tail -1`
+      thefile=$2
+      if [ -f $srcdir/$thefile ]; then
+          thefile=$srcdir/$thefile
+      fi
+      echo
+      echo "Setting date of $thefile back in time with:"
+      echo "touch -r $oldestdep $thefile" ; touch -r $oldestdep $thefile
+    fi
+    ;;
+  show )
+    if [ $# -ne 1 ]; then usage; fi
+    if test "$using_unsermake" != "new"; then
+      # Look at the commands that make will issue, and extract "-o output".
+      # The only trouble, with libtool, is that this gives us .libs/foo.o instead of foo.lo
+      make SUBDIRS='' -n | grep '\-o' | sed -e 's/.*-o \([^ ]*\).*/\1/'
+    else
+      # Solve the above problem (when using new-unsermake) by watching the "echo" lines for creating .lo files
+      # separately from the rest of the "-o target" lines (for libs and binaries)
+      # (For libs and bins another way would be to grep for "linking")
+      # The "ls" is for sorting by date
+      $UNSERMAKE -n | perl -e 'while(<>) { if (/by libtool/) { s/.*> //; print; } if (m/-o ([^ ]*)/ && $1!~/\.o$/) { print "$1\n"; } }' | xargs --no-run-if-empty ls -t -1
+    fi
+    ;;
+  why )
+    if [ $# -ne 2 ]; then usage; fi
+    ## TODO: unsermake support (or support in unsermake itself)
+    make SUBDIRS='' -n -d $2 | egrep -e "(newer than target \`$2'|Must)"
+    ;;
+  * ) usage ;;
+esac