Testing File.exist? in Capistrano scripts

data.rb

namespace :file_tests do
	task :exists do
		user = capture("whoami")
		logger.debug "User is #{user}"
		release_dir = capture("readlink /sites/dash/www").strip
		logger.debug "Release directory is #{release_dir}"
		file_exists("/etc/environment")
		file_exists("/etc/not_really_there")
		file_exists("/sites/dash/www/framework/sake")
		file_exists("#{release_dir}")
		file_exists("#{release_dir}/framework/sake")
	end

	def file_exists(file_path)
		exists = false
		if File.exist?(file_path)
			logger.debug "File.exist? says that #{file_path} exists!"
			exists = true
		end

		if "true" == capture("if [ -e '#{file_path}' ]; then echo 'true'; fi").strip
			logger.debug "Inline bash says that #{file_path} exists!"
			exists = true
		end

		stat = capture("stat '#{file_path}' || true")
		if !stat.include?("No such file or directory")
			logger.debug "Stat says that #{file_path} exists!"
			exists = true
		end

		if !exists
			logger.debug "No checks return true for #{file_path}."
		end
	end
end

output.txt

## Trimmed for readability
aafincham@aafincham-dell:~/home/devPublic/cwp-projects/template/dash$ cap dash:deploynaut:vagrant file_tests:exists
  * User is dash
  * Release directory is /sites/dash/releases/20171218144524
  
  * File.exist? says that /etc/environment exists!
  * Inline bash says that /etc/environment exists!
  * Stat says that /etc/environment exists!

  * No checks return true for /etc/not_really_there.

  * Inline bash says that /sites/dash/www/framework/sake exists!
  * Stat says that /sites/dash/www/framework/sake exists!

  * Inline bash says that /sites/dash/releases/20171218144524 exists!
  * Stat says that /sites/dash/releases/20171218144524 exists!
  
  * Inline bash says that /sites/dash/releases/20171218144524/framework/sake exists!
  * Stat says that /sites/dash/releases/20171218144524/framework/sake exists!

stat_output.txt

File: ‘/etc/environment’
  * Size: 74            Blocks: 8          IO Block: 4096   regular file
  * Device: fe00h/65024d        Inode: 788431      Links: 1
  * Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
  * Access: 2017-12-19 03:42:01.828415491 +1300
  * Modify: 2017-12-07 23:19:27.776305117 +1300
  * Change: 2017-12-07 23:19:27.776305117 +1300
  * Birth: -

 File: ‘/sites/dash/www/framework/sake’
  * Size: 2814          Blocks: 8          IO Block: 4096   regular file
  * Device: fe00h/65024d        Inode: 533472      Links: 1
  * Access: (0775/-rwxrwxr-x)  Uid: ( 1002/    dash)   Gid: ( 1002/    dash)
  * Access: 2017-12-19 03:49:05.720255491 +1300
  * Modify: 2017-12-07 13:35:49.000000000 +1300
  * Change: 2017-12-19 03:49:05.680235496 +1300
  * Birth: -
  
File: ‘/sites/dash/releases/20171218144524’
  * Size: 4096          Blocks: 8          IO Block: 4096   directory
  * Device: fe00h/65024d        Inode: 406875      Links: 25
  * Access: (2775/drwxrwsr-x)  Uid: ( 1002/    dash)   Gid: ( 1002/    dash)
  * Access: 2017-12-19 03:49:12.379583491 +1300
  * Modify: 2017-12-19 03:49:12.339563491 +1300
  * Change: 2017-12-19 03:49:12.339563491 +1300
  * Birth: -
  
File: ‘/sites/dash/releases/20171218144524/framework/sake’
  * Size: 2814          Blocks: 8          IO Block: 4096   regular file
  * Device: fe00h/65024d        Inode: 533472      Links: 1
  * Access: (0775/-rwxrwxr-x)  Uid: ( 1002/    dash)   Gid: ( 1002/    dash)
  * Access: 2017-12-19 03:49:05.720255491 +1300
  * Modify: 2017-12-07 13:35:49.000000000 +1300
  * Change: 2017-12-19 03:49:05.680235496 +1300
  * Birth: -