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

sdk/bin/dartanalyzer_developer

Index: sdk/bin/dartanalyzer_developer
diff --git a/sdk/bin/dartanalyzer_developer b/sdk/bin/dartanalyzer_developer
index b522f56902026a1469a2af28b288a8b808eec2f6..8aff3c1e6d0b5a6fe8fc906c2b6283840d72612c 100755
--- a/sdk/bin/dartanalyzer_developer
+++ b/sdk/bin/dartanalyzer_developer
@@ -9,20 +9,19 @@
 set -e
 
 function follow_links() {
-  while [ -h "$1" ]; do
+  file="$1"
+  while [ -h "$file" ]; do
     # On Mac OS, readlink -f doesn't work.
-    1="$(readlink "$1")"
+    file="$(readlink "$file")"
   done
-  echo "$1"
+  echo "$(cd "$(dirname $file)"; pwd -P)/$(basename "$file")"
 }
 
-# Unlike $0, $BASH_SOURCE points to the absolute path of this file.
-PROG_NAME="$(follow_links "$BASH_SOURCE")"
-
-# Handle the case where the binary dir has been symlinked to.
-CUR_DIR="$(follow_links "$(cd "${PROG_NAME%/*}" ; pwd -P)")"
-
-SDK_DIR="$(cd "${CUR_DIR}/.." ; pwd -P)"
+# Unlike $0, $BASH_SOURCE points to the absolute path of this file. Follow
+# symlinks to handle the case where dart-sdk/bin or
+# dart-sdk/bin/dartanalyzer_developer have been linked to.
+CUR_DIR="$(dirname "$(follow_links "$BASH_SOURCE")")"
+SDK_DIR="$(dirname "$CUR_DIR")"
 
 if [ -z "$DART_CONFIGURATION" ];
 then