Class AutomateIt::ShellManager
In: lib/automateit/shell_manager.rb
Parent: AutomateIt::Plugin::Manager

ShellManager

The ShellManager provides Unix-like shell commands for manipulating files and executing commands.

WARNING: Previewing code can be dangerous. Read previews.txt for instructions on how to write code that can be safely previewed.

Methods

backup   cd   chmod   chmod_R   chown   chown_R   chperm   cp   cp_R   cp_r   install   ln   ln_s   ln_sf   mkdir   mkdir_p   mktemp   mktempdir   mktempdircd   mv   provides_link?   provides_mode?   provides_ownership?   provides_symlink?   pwd   rm   rm_r   rm_rf   rmdir   sh   touch   umask   which   which!  

Public Instance methods

Backup sources if they exist. Returns the names of the backups created.

Options:

  • :quiet — Don‘t display output? Default is false.

These backups are copies of the original sources saved into the same directories as the originals. The pathnames of these copies are timestamped and guaranteed to be unique, so you can have multiple backups of the same sources.

WARNING: This method is not conditional. It will make a backup every time it‘s called if the sources exist. Therefore, only execute this method when its needed.

For example, backup a file:

  backup("/tmp/myfile") # => "/tmp/myfile.1190994237_M2xhLrC6Sj.bak

In the above example, the backup‘s name contains two special strings. The "1190994237" is the time the backup was made in seconds since the Epoch. The "M2xhLrC6Sj" is a random string used to guarantee the uniqueness of this backup in case two are made at exactly the same time.

[Source]

# File lib/automateit/shell_manager.rb, line 51
  def backup(*sources) dispatch(*sources) end

Changes the directory into the specified dir. If called with a block, changes to the directory for the duration of the block, and then changes back to the previous directory at the end.

WARNING: Previewing code can be dangerous. Read previews.txt for instructions on how to write code that can be safely previewed.

[Source]

# File lib/automateit/shell_manager.rb, line 143
  def cd(dir, opts={}, &block) dispatch(dir, opts, &block) end

Change the permission mode of the targets. Returns an array of targets modified or false if all have the desired mode.

[Source]

# File lib/automateit/shell_manager.rb, line 238
  def chmod(mode, targets, opts={}) dispatch(mode, targets, opts) end

Change the permission mode of the targets recursively. Returns an array of targets modified or false if all have the desired mode.

[Source]

# File lib/automateit/shell_manager.rb, line 242
  def chmod_R(mode, targets, opts={}) dispatch(mode, targets, opts) end

Change the user and group ownership of the targets. You can leave either the user or group as nil if you don‘t want to change it. Returns an array of targets modified or false if all have the desired ownership.

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# File lib/automateit/shell_manager.rb, line 248
  def chown(user, group, targets, opts={}) dispatch(user, group, targets, opts) end

Change the user and group ownership of the targets recursively. You can leave either the user or group as nil if you don‘t want to change it. Returns an array of targets modified or false if all have the desired ownership.

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# File lib/automateit/shell_manager.rb, line 254
  def chown_R(user, group, targets, opts={}) dispatch(user, group, targets, opts) end

Change the permissions of the targets. This command is like the chmod and chown in a single command.

Options:

  • :recursive — Change files and directories recursively. Defaults to false.
  • :user — User name to change ownership to.
  • :group — Group name to change ownership to.
  • :mode — Mode to use as octal, e.g., 0400 to make a file readable only to its owner.
  • :details — Reports the files modified, rather than the arguments modified. An argument might be a single directory, but this may result in modifications to many files within that directory. Use :details for situations when there‘s a need to see all files actually changed. The reason :details is off by default is that it will flood the screen with a list of all files modified in a large directory, which is overwhelming and probably unnecessary unless you actually need to see these details. Defaults to false.

[Source]

# File lib/automateit/shell_manager.rb, line 127
  def chperm(targets, opts={}) dispatch(targets, opts) end

Copy the sources to the target. Returns an array of sources copied or false if all are present.

Options:

  • :preserve — Preserve file modification time and ownership. Defaults to false. Can be true, false, or :try. If :try, the properties will be preserved if possible on the platform, whereas true will raise an exception if not available.
  • :recursive — Copy files and directories recursively, boolean.

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# File lib/automateit/shell_manager.rb, line 206
  def cp(sources, target, opts={}) dispatch(sources, target, opts) end

Copy the sources to the target recursively. Returns an array of sources copied or false if all are present.

[Source]

# File lib/automateit/shell_manager.rb, line 214
  def cp_R(sources, target, opts={}) dispatch(sources, target, opts) end

Copy the sources to the target recursively. Returns an array of sources copied or false if all are present.

[Source]

# File lib/automateit/shell_manager.rb, line 210
  def cp_r(sources, target, opts={}) dispatch(sources, target, opts) end

Copy the source to the target and set its mode. Returns true if the file was installed or false if already present.

[Source]

# File lib/automateit/shell_manager.rb, line 234
  def install(source, target, mode) dispatch(source, target, mode) end

Create a hard link between the source and target. Your platform must support hard links to use this. Returns the target created or false if the link is already present.

[Source]

# File lib/automateit/shell_manager.rb, line 184
  def ln(source, target, opts={}) dispatch(source, target, opts) end

Create a symbolic link between the sources and target. Your platform must support symbolic links to use this. Returns an array of sources linked or false if all are already present.

[Source]

# File lib/automateit/shell_manager.rb, line 189
  def ln_s(sources, target, opts={}) dispatch(sources, target, opts) end

Create a symbolic link between the sources and target. If the target already exists, will remove it and recreate it. Your platform must support symbolic links to use this. Returns an array of sources linked or false if all are already present.

[Source]

# File lib/automateit/shell_manager.rb, line 195
  def ln_sf(sources, target, opts={}) dispatch(sources, target, opts) end

Create a directory or directories. Returns an array of directories created or false if all directories are already present.

Options:

  • :parents — Create parents, like "mkdir -p". Boolean.
  • :mode, :user, :group — See chperm

WARNING: Previewing code can be dangerous. Read previews.txt for instructions on how to write code that can be safely previewed.

[Source]

# File lib/automateit/shell_manager.rb, line 158
  def mkdir(dirs, opts={}, &block) dispatch(dirs, &block) end

Create a directory or directories with their parents. Returns an array of directories created or false if all directories are already present.

Options same as mkdir.

Example:

  File.exists?("/tmp/foo") # => false
  mkdir_p("/tmp/foo/bar")
  File.exists?("/tmp/foo") # => true
  File.exists?("/tmp/foo/bar") # => true

WARNING: Previewing code can be dangerous. Read previews.txt for instructions on how to write code that can be safely previewed.

[Source]

# File lib/automateit/shell_manager.rb, line 174
  def mkdir_p(dirs, opts={}, &block) dispatch(dirs, &block) end

Creates a temporary file. Optionally takes a name argument which is purely cosmetic, e.g., if the name is "foo", the routine may create a temporary file named /tmp/foo_qeKo7nJk1s.

When called with a block, invokes the block with the path of the temporary file and deletes the file at the end of the block.

Without a block, returns the path of the temporary file and you‘re responsible for removing it when done.

[Source]

# File lib/automateit/shell_manager.rb, line 74
  def mktemp(name=nil, &block) # :yields: path
    dispatch(name, &block)
  end

Creates a temporary directory. See mktemp for details on the name argument.

When called with a block, invokes the block with the path of the temporary directory and recursively deletes the directory and its contents at the end of the block.

Without a block, returns the path of the temporary directory and you‘re responsible for removing it when done.

CAUTION: Read notes at the top of ShellManager for potentially problematic situations that may be encountered if using this command in preview mode!

[Source]

# File lib/automateit/shell_manager.rb, line 91
  def mktempdir(name=nil, &block) # :yields: path
    dispatch(name, &block)
  end

Same as mktempdir but performs a cd into the directory for the duration of the block.

Example:

  puts pwd # => "/home/bubba"
  mktempdircd do |path|
    puts path # => "/tmp/tempster_qeKo7nJk1s"
    puts pwd  # => "/tmp/tempster_qeKo7nJk1s"
  end
  puts File.exists?("/tmp/tempster_qeKo7nJk1s") # => false

[Source]

# File lib/automateit/shell_manager.rb, line 106
  def mktempdircd(name=nil, &block) # :yields: path
    dispatch(name, &block)
  end

Move the sources to the target. Returns an array of sources copied or false if none of the sources exist.

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# File lib/automateit/shell_manager.rb, line 218
  def mv(sources, target) dispatch(sources, target) end

See ShellManager#provides_mode?

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# File lib/automateit/shell_manager.rb, line 25
  def provides_link?() dispatch_safely end

See ShellManager#provides_mode?

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# File lib/automateit/shell_manager.rb, line 16
  def provides_mode?() dispatch_safely end

See ShellManager#provides_mode?

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# File lib/automateit/shell_manager.rb, line 19
  def provides_ownership?() dispatch_safely end

See ShellManager#provides_mode?

[Source]

# File lib/automateit/shell_manager.rb, line 22
  def provides_symlink?() dispatch_safely end

Returns the current directory.

[Source]

# File lib/automateit/shell_manager.rb, line 146
  def pwd() dispatch() end

Remove the targets. Returns a list of targets removed or false if none of them exist.

[Source]

# File lib/automateit/shell_manager.rb, line 222
  def rm(targets, opts={}) dispatch(targets, opts) end

Remove the targets recursively. Returns a list of targets removed or false if none of them exist.

[Source]

# File lib/automateit/shell_manager.rb, line 226
  def rm_r(targets, opts={}) dispatch(targets, opts) end

Remove the targets recursively and forcefully. Returns a list of targets removed or false if none of them exist.

[Source]

# File lib/automateit/shell_manager.rb, line 230
  def rm_rf(targets, opts={}) dispatch(targets, opts) end

Remove a directory or directories. The directories must be empty or an exception is thrown. Returns the directories removed or false if none of the directories exist.

[Source]

# File lib/automateit/shell_manager.rb, line 179
  def rmdir(dirs) dispatch(dirs) end

Execute a shell command.

[Source]

# File lib/automateit/shell_manager.rb, line 54
  def sh(*commands) dispatch(*commands) end

Create the targets as files if needed and update their modification time. Unlike most other commands provided by ShellManager, this one will always modify the targets. Returns an array of targets modified.

Options:

  • :like — Touch the targets like this file. Defaults to none.
  • :stamp — Set the targets to the specified timestamp. Defaults to Time.now.

[Source]

# File lib/automateit/shell_manager.rb, line 263
  def touch(targets, opts={}) dispatch(targets, opts) end

Set the umask to mode. If given a block, changes the umask only for the duration of the block and changes it back to its previous setting at the end.

[Source]

# File lib/automateit/shell_manager.rb, line 132
  def umask(mode=nil, &block) dispatch(mode, &block) end

What is the path for this command? Returns nil if command isn‘t found.

Example:

  which("ls") # => "/bin/ls"

[Source]

# File lib/automateit/shell_manager.rb, line 60
  def which(command) dispatch(command) end

Same as which but throws an ArgumentError if command isn‘t found.

[Source]

# File lib/automateit/shell_manager.rb, line 63
  def which!(command) dispatch(command) end

[Validate]