Use full paths. (#41547)

Casks/minecraft-server.rb

@@ -16,16 +16,16 @@ cask 'minecraft-server' do
   preflight do
     IO.write shimscript, <<~EOS
       #!/bin/sh
-      cd "$(dirname "$(readlink -n $0)")" && \
-        java -Xmx1024M -Xms1024M -jar 'minecraft_server.#{version}.jar' nogui
+      cd "$(dirname "$(readlink -n "$0" || echo "$0")")" && \
+        /usr/bin/java -Xmx1024M -Xms1024M -jar 'minecraft_server.#{version}.jar' nogui
     EOS
   end
 
   postflight do
-    system_command 'minecraft-server'
+    system_command shimscript
 
     eula_file = "#{staged_path}/eula.txt"
-    IO.write(eula_file, IO.read(eula_file).gsub('false', 'TRUE'))
+    IO.write(eula_file, IO.read(eula_file).sub('eula=false', 'eula=TRUE'))
   end
 
   caveats do

Casks/qlcolorcode.rb

@@ -14,7 +14,7 @@ cask 'qlcolorcode' do
 
   postflight do
     # This sets the path to the highlight binary to the preferred one found in $PATH.
-    system 'defaults write org.n8gray.QLColorCode pathHL "$(which highlight)"'
+    system_command '/usr/bin/defaults', args: ['write', 'org.n8gray.QLColorCode', 'pathHL', Formula['highlight'].bin]
   end
 
   zap trash: '~/Library/Preferences/org.n8gray.QLColorCode.plist'

Casks/squirrelsql.rb

@@ -72,11 +72,11 @@ cask 'squirrelsql' do
   end
 
   postflight do
-    system_command 'java', args: ['-jar', "#{staged_path}/squirrel-sql-#{version}-MACOSX-install.jar", installoptions.to_s]
+    system_command '/usr/bin/java', args: ['-jar', "#{staged_path}/squirrel-sql-#{version}-MACOSX-install.jar", installoptions.to_s]
   end
 
   uninstall_postflight do
-    system_command 'java', args: ['-jar', "#{appdir}/SQuirreLSQL.app/Uninstaller/uninstaller.jar", '-f', '-c']
+    system_command '/usr/bin/java', args: ['-jar', "#{appdir}/SQuirreLSQL.app/Uninstaller/uninstaller.jar", '-f', '-c']
   end
 
   zap trash: '~/.squirrel-sql'