Make it possible to symlink to dartdoc and pub in the SDK.

sdk/bin/dartdoc

 #!/bin/bash
 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # Setting BIN_DIR this way is ugly, but is needed to handle the case where
-# dart-sdk/bin has been symlinked to. On MacOS, readlink doesn't work
-# with this case.
-BIN_DIR="$(cd "${0%/*}" ; pwd -P)"
+# dart-sdk/bin and/or dart-sdk/bin/pub has been symlinked to. On MacOS, readlink

[dgrove, 2013/05/30 19:46:38]

pub => dartdoc

[nweiz, 2013/05/30 20:01:26]

Done.

+# doesn't work with this case.
+linked_path=`readlink "$0"`
+if [ "$linked_path" = "" ]; then
+    BIN_DIR="$(cd "${0%/*}" ; pwd -P)"
+else
+    BIN_DIR="$(cd "${linked_path%/*}" ; pwd -P)"

[dgrove, 2013/05/30 19:46:38]

I am not following what you're trying to do here. can you explain?

[nweiz, 2013/05/30 20:01:26]

If dart-sdk/bin/dartdoc is symlinked to, $0 will point to the symlink, rather
than the resolved path, so we use readlink to resolve the symlink and get the
actual path.

+fi
+DART_SDK="$(cd "${BIN_DIR%/*}" ; pwd -P)"

[dgrove, 2013/05/30 19:46:38]

what is this used for?

[nweiz, 2013/05/30 20:01:26]

Left over from the pub script; removed.

 
 unset COLORS
 if test -t 1; then
   # Stdout is a terminal.
   if test 8 -le `tput colors`; then
     # Stdout has at least 8 colors, so enable colors.
     COLORS="--enable-diagnostic-colors"
   fi
 fi
 
 unset SNAPSHOT
 if test -f "$BIN_DIR/../lib/_internal/dartdoc/bin/dartdoc.dart.snapshot"; then
   # TODO(ahe): Remove the following line when we are relatively sure it works.
   echo Using snapshot "$BIN_DIR/../lib/_internal/dartdoc/bin/dartdoc.dart.snapshot" 1>&2
   SNAPSHOT="--use-script-snapshot=$BIN_DIR/../lib/_internal/dartdoc/bin/dartdoc.dart.snapshot"
 fi
 exec "$BIN_DIR"/dart --heap_growth_rate=32 "--package-root=$BIN_DIR/../packages/" $SNAPSHOT "$BIN_DIR/../lib/_internal/dartdoc/bin/dartdoc.dart" "--package-root=$BIN_DIR/../packages/" $COLORS "$@"