Overhaul boot script

* Call autoreconf only if necessary, avoiding a strict tool dependency.
* Be a good *nix citizen and don't clutter the output when everything is fine.
* Make a few more scripts executable.

1 files changed, 22 insertions, 23 deletions

diff --git a/boot b/boot
index 14d886a347..be9291d979 100644
--- a/boot
+++ b/boot
@@ -1,29 +1,28 @@
-#!/bin/sh
-
+#! /bin/sh
 set -e
 
-for d in `cat libraries/core-packages`
-do
-    if test ! -d libraries/$d
-    then
-        echo "Looks like you're missing libraries/$d,"
-        echo "maybe you haven't done './darcs-all get'?"
-        exit 1
-    fi
+# Check that we have all core packages.
+for dir in `cat libraries/core-packages`; do
+  if test ! -d libraries/$dir; then
+    echo "Looks like you're missing libraries/$dir, maybe you haven't done './darcs-all get'?" >&2
+    exit 1
+  fi
 done
 
-chmod +x push-all
-
-echo "Booting ."
-autoreconf
-
-for lib in libraries/*; do
-    if test -e $lib/configure.ac
-    then
-        echo "Booting $lib"
-        cd $lib
-        autoreconf
-        cd ../..
-    fi
+# We don't recurse into the library packages with autoreconf anymore, so we
+# have to do this manually. To avoid a strict dependency on autoreconf, we
+# are careful to call autoreconf only when configure does not exist yet or the
+# corresponding configure.ac is newer. This would be dead easy if every shell
+# supported the "-nt" option for "test", but this is not the case. The only
+# portable solution seems to be via find's "-newer" option or to basically give
+# up and replace find with perl:   :-P
+#
+#   perl -e 'print "configure.ac\n" if -M "configure.ac" < -M "configure"'
+for dir in . libraries/*; do
+  if test -f $dir/configure.ac; then
+    ( cd $dir ; { test ! -f configure || test -n "`find configure.ac -newer configure`"; } && autoreconf )
+  fi
 done
 
+# Alas, darcs doesn't handle file permissions, so fix a few of them.
+chmod +x boot darcs-all push-all