Returns information for heaps in the GC.
If the first optional argument, heap_name, is passed in and not nil, it returns a Hash containing information about the particular heap. Otherwise, it will return a Hash with heap names as keys and a Hash containing information about the heap as values.
If the second optional argument, hash_or_key, is given as a Hash, it will be overwritten and returned. This is intended to avoid the probe effect.
If both optional arguments are passed in and the second optional argument is a symbol, it will return a Numeric value for the particular heap.
On CRuby, heap_name is of the type Integer but may be of type String on other implementations.
The contents of the hash are implementation-specific and may change in the future without notice.
If the optional argument, hash, is given, it is overwritten and returned.
This method is only expected to work on CRuby.
The hash includes the following keys about the internal information in the GC:
The slot size of the heap in bytes.
The number of pages that can be allocated without triggering a new garbage collection cycle.
The number of pages in the eden heap.
The total number of slots in all of the pages in the eden heap.
The number of pages in the tomb heap. The tomb heap only contains pages that do not have any live objects.
The total number of slots in all of the pages in the tomb heap.
The total number of pages that have been allocated in the heap.
The total number of pages that have been freed and released back to the system in the heap.
The number of times this heap has forced major garbage collection cycles to start due to running out of free slots.
The number of times this heap has forced incremental marking to complete due to running out of pooled slots.
Adds a post-build hook that will be passed an Gem::Installer instance when Gem::Installer#install is called. The hook is called after the gem has been extracted and extensions have been built but before the executables or gemspec has been written. If the hook returns false then the gem’s files will be removed and the install will be aborted.
Find rubygems plugin files in the standard location and load them
The path to standard location of the user’s state file.
The path to standard location of the user’s state directory.
Recursively copies files from src to dest.
Arguments src and dest should be interpretable as paths.
If src is the path to a file, copies src to dest:
FileUtils.touch('src0.txt') File.exist?('dest0.txt') # => false FileUtils.copy_entry('src0.txt', 'dest0.txt') File.file?('dest0.txt') # => true
If src is a directory, recursively copies src to dest:
tree('src1') # => src1 # |-- dir0 # | |-- src0.txt # | `-- src1.txt # `-- dir1 # |-- src2.txt # `-- src3.txt FileUtils.copy_entry('src1', 'dest1') tree('dest1') # => dest1 # |-- dir0 # | |-- src0.txt # | `-- src1.txt # `-- dir1 # |-- src2.txt # `-- src3.txt
The recursive copying preserves file types for regular files, directories, and symbolic links; other file types (FIFO streams, device files, etc.) are not supported.
Keyword arguments:
dereference_root: true - if src is a symbolic link, follows the link.
preserve: true - preserves file times.
remove_destination: true - removes dest before copying files.
Related: methods for copying.
Recursively copies files from src to dest.
Arguments src and dest should be interpretable as paths.
If src is the path to a file, copies src to dest:
FileUtils.touch('src0.txt') File.exist?('dest0.txt') # => false FileUtils.copy_entry('src0.txt', 'dest0.txt') File.file?('dest0.txt') # => true
If src is a directory, recursively copies src to dest:
tree('src1') # => src1 # |-- dir0 # | |-- src0.txt # | `-- src1.txt # `-- dir1 # |-- src2.txt # `-- src3.txt FileUtils.copy_entry('src1', 'dest1') tree('dest1') # => dest1 # |-- dir0 # | |-- src0.txt # | `-- src1.txt # `-- dir1 # |-- src2.txt # `-- src3.txt
The recursive copying preserves file types for regular files, directories, and symbolic links; other file types (FIFO streams, device files, etc.) are not supported.
Keyword arguments:
dereference_root: true - if src is a symbolic link, follows the link.
preserve: true - preserves file times.
remove_destination: true - removes dest before copying files.
Related: methods for copying.
Copies file from src to dest, which should not be directories.
Arguments src and dest should be interpretable as paths.
Examples:
FileUtils.touch('src0.txt') FileUtils.copy_file('src0.txt', 'dest0.txt') File.file?('dest0.txt') # => true
Keyword arguments:
dereference: false - if src is a symbolic link, does not follow the link.
preserve: true - preserves file times.
remove_destination: true - removes dest before copying files.
Related: methods for copying.
Copies file from src to dest, which should not be directories.
Arguments src and dest should be interpretable as paths.
Examples:
FileUtils.touch('src0.txt') FileUtils.copy_file('src0.txt', 'dest0.txt') File.file?('dest0.txt') # => true
Keyword arguments:
dereference: false - if src is a symbolic link, does not follow the link.
preserve: true - preserves file times.
remove_destination: true - removes dest before copying files.
Related: methods for copying.
Returns an array of the string method names of the methods that accept the given keyword option opt; the argument must be a symbol:
FileUtils.collect_method(:preserve) # => ["cp", "copy", "cp_r", "install"]
Basically a wrapper for Process.spawn that:
Creates a child process for each of the given cmds by calling Process.spawn.
Does not wait for child processes to exit.
With no block given, returns an array of the wait threads for all of the child processes.
Example:
wait_threads = Open3.pipeline_start('ls', 'grep R') # => [#<Process::Waiter:0x000055e8de9d2bb0 run>, #<Process::Waiter:0x000055e8de9d2890 run>] wait_threads.each do |wait_thread| wait_thread.join end
Output:
Rakefile README.md
With a block given, calls the block with an array of the wait processes:
Open3.pipeline_start('ls', 'grep R') do |wait_threads| wait_threads.each do |wait_thread| wait_thread.join end end
Output:
Rakefile README.md
Like Process.spawn, this method has potential security vulnerabilities if called with untrusted input; see Command Injection.
If the first argument is a hash, it becomes leading argument env in each call to Process.spawn; see Execution Environment.
If the last argument is a hash, it becomes trailing argument options in each call to Process.spawn; see Execution Options.
Each remaining argument in cmds is one of:
A command_line: a string that begins with a shell reserved word or special built-in, or contains one or more metacharacters.
An exe_path: the string path to an executable to be called.
An array containing a command_line or an exe_path, along with zero or more string arguments for the command.
Basically a wrapper for Process.spawn that:
Creates a child process for each of the given cmds by calling Process.spawn.
Does not wait for child processes to exit.
With no block given, returns an array of the wait threads for all of the child processes.
Example:
wait_threads = Open3.pipeline_start('ls', 'grep R') # => [#<Process::Waiter:0x000055e8de9d2bb0 run>, #<Process::Waiter:0x000055e8de9d2890 run>] wait_threads.each do |wait_thread| wait_thread.join end
Output:
Rakefile README.md
With a block given, calls the block with an array of the wait processes:
Open3.pipeline_start('ls', 'grep R') do |wait_threads| wait_threads.each do |wait_thread| wait_thread.join end end
Output:
Rakefile README.md
Like Process.spawn, this method has potential security vulnerabilities if called with untrusted input; see Command Injection.
If the first argument is a hash, it becomes leading argument env in each call to Process.spawn; see Execution Environment.
If the last argument is a hash, it becomes trailing argument options in each call to Process.spawn; see Execution Options.
Each remaining argument in cmds is one of:
A command_line: a string that begins with a shell reserved word or special built-in, or contains one or more metacharacters.
An exe_path: the string path to an executable to be called.
An array containing a command_line or an exe_path, along with zero or more string arguments for the command.
Returns a parse result whose value is an array of tokens that closely resembles the return value of Ripper::lex. The main difference is that the :on_sp token is not emitted.
For supported options, see Prism::parse.
Mirror the Prism.parse_comments API by using the serialization API.
Fetch the start code units offset of the value, for the encoding that was configured on the repository.
Fetch the end code units column of the value, for the encoding that was configured on the repository.
END {} ^^^^^^
Full paths in the gem to add to $LOAD_PATH when this gem is activated.
Creates a Resolver that queries only against the already installed gems for the needed dependencies.
Returns a Set that can fetch specifications from this source.
The set will optionally fetch prereleases if requested.
Return currently unresolved specs that contain the file matching path.