Expose and refer to assets on the sub_uri.

When using sub-uri, create a symlink in public/ making the assets
available at the sub-uri. Modify environment.rb so that asset paths
refers to this sub-uri path. Closes http://bugs.joindiaspora.com/issues/391
and http://bugs.joindiaspora.com/issues/737 when application mounted
on suburi (i. e., prev patch)

.gitignore

@@ -18,6 +18,7 @@ public/stylesheets/application.css
 public/stylesheets/sessions.css
 public/stylesheets/ui.css
 public/stylesheets/mobile.css
+public/diaspora
 spec/fixtures/users.yaml
 
 # Uploded files and local files

config/environment.rb

@@ -26,3 +26,12 @@ end
 
 # Initialize the rails application
 Diaspora::Application.initialize!
+
+# Presume the assets are exposed on the sub_uri.
+if AppConfig[ :pod_uri].path != "/"
+    ActionController::Base.asset_host =
+        Proc.new{ |source, request|
+           request.scheme + "://" + 
+               request.host_with_port + AppConfig[:pod_uri].path
+        }
+end

features/uri-tests/uri.feature

@@ -12,7 +12,7 @@ Feature: Flexible uri deployment
     Scenario: Present application to user
         Given configuration parameter pod_url is http://localhost:3000/diaspora
         When I visit url http://localhost:3000/diaspora
-        And  I retrieve http://localhost:3000/diaspora into tmp/index.html
+        And  I retrieve http://localhost:3000/diaspora/ into tmp/index.html
         Then I should see "put something in"
         And  a page-asset should be http://localhost:3000/diaspora/stylesheets/ui.css
         And  I should match 'http://localhost:3000/diaspora/stylesheets/blueprint/print.css.[0-9]+"' in tmp/index.html

script/get_env.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+#
+# Get value from AppConfig
+#
+# Usage get_env [key ...]
+
+path=$( readlink -fn $0) && cd $(dirname $path)/.. || exit 2
+
+size=0
+size=$( wc tmp/environment 2>/dev/null | awk '{print $1}') || :
+if [[ "$size" = "0"  || tmp/environment -ot config/app_config.yml ]]
+then
+    ruby > tmp/environment << 'EOT'
+        require File.join('config', 'environment.rb')
+        AppConfig.config_vars.each { |key, value| 
+           puts key.to_s + "\t" + value.to_s 
+        }
+        puts "pod_uri.host\t" + AppConfig[:pod_uri].host.to_s
+        puts "pod_uri.path\t" + AppConfig[:pod_uri].path.to_s
+        puts "pod_uri.port\t" + AppConfig[:pod_uri].port.to_s
+EOT
+fi
+
+for key in $@; do
+    awk -v key=$key '{ if ($1 == key ) print $2 }' < tmp/environment
+done

script/server

@@ -9,12 +9,22 @@ OS=`uname -s`
 
 [ -e config/server.sh ] && source config/server.sh
 
+function init_suburi_assets
+# fix a symlink corresponding to sub-uri
+{
+    find public -maxdepth 1 -type l -delete
+    sub_uri=$(./script/get_env.sh pod_uri.path)
+    if [  -n "$sub_uri" -a "$sub_uri"  != "/" ]; then
+        cd public; ln -sf . ${sub_uri##/}; cd ..
+    fi
+}
+
 function init_public
 # Create all dynamically generated files in public/ folder
 {
     bundle exec thin \
-         -d --pid log/thin.pid --address localhost --port $THIN_PORT \
-         start
+        -d --pid log/thin.pid --address localhost --port $THIN_PORT \
+        start
     for ((i = 0; i < 30; i += 1)) do
         sleep 2
         wget -q -O tmp/server.html http://localhost:$THIN_PORT && \
@@ -107,8 +117,6 @@ if [ -n "$services" ]; then
     exit 64
 fi
 
-
-
 # Check if Mongo is running
 if  ! ps ax | grep -v grep | grep mongod >/dev/null
 then
@@ -140,6 +148,7 @@ if [ ! -e 'public/stylesheets/application.css' ]; then
     exit 66
 fi
 
+[ -w public ] && init_suburi_assets
 
 mkdir -p -v log/thin/
 bundle exec ruby ./script/websocket_server.rb&