os
package os
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- trait BasePath extends AnyRef
A path which is either an absolute Path, a relative RelPath, or a ResourcePath with shared APIs and implementations.
A path which is either an absolute Path, a relative RelPath, or a ResourcePath with shared APIs and implementations.
Most of the filesystem-independent path-manipulation logic that lets you splice paths together or navigate in and out of paths lives in this interface
- trait BasePathImpl extends BasePath
- case class CommandResult(exitCode: Int, chunks: Seq[Either[Bytes, Bytes]]) extends Product with Serializable
Contains the accumulated output for the invocation of a subprocess command.
Contains the accumulated output for the invocation of a subprocess command.
Apart from the exit code, the primary data-structure is a sequence of byte chunks, tagged with Left for stdout and Right for stderr. This is interleaved roughly in the order it was emitted by the subprocess, and reflects what a user would have see if the subprocess was run manually.
Derived from that, is the aggregate
out
anderr
StreamValues, wrapping stdout/stderr respectively, and providing convenient access to the aggregate output of each stream, as bytes or strings or lines. - sealed trait FilePath extends BasePath
Represents a value that is either an absolute Path or a relative RelPath, and can be constructed from a java.nio.file.Path or java.io.File
- sealed trait FileType extends AnyRef
Simple enum with the possible filesystem objects a path can resolve to
- type Generator[+T] = geny.Generator[T]
- class GlobInterpolator extends AnyRef
Lets you pattern match strings with interpolated glob-variables
- class Path extends FilePath with ReadablePath with BasePathImpl
An absolute path on the filesystem.
An absolute path on the filesystem. Note that the path is normalized and cannot contain any empty
""
,"."
or".."
segments - case class PathAppendRedirect(p: Path) extends ProcessOutput with Product with Serializable
- trait PathChunk extends AnyRef
- sealed trait PathConvertible[T] extends AnyRef
- case class PathRedirect(p: Path) extends ProcessInput with ProcessOutput with Product with Serializable
- case class PermSet(value: Int) extends Product with Serializable
A set of permissions; can be converted easily to the rw-rwx-r-x form via toString, or to a set of PosixFilePermissions via toSet and the other way via
PermSet.fromString
/PermSet.fromSet
- case class PosixStatInfo(owner: UserPrincipal, permissions: PermSet) extends Product with Serializable
- trait ProcessInput extends AnyRef
Represents the configuration of a SubProcess's input stream.
Represents the configuration of a SubProcess's input stream. Can either be os.Inherit, os.Pipe, os.Path or a os.Source
- trait ProcessOutput extends AnyRef
Represents the configuration of a SubProcess's output or error stream.
Represents the configuration of a SubProcess's output or error stream. Can either be os.Inherit, os.Pipe, os.Path or a os.ProcessOutput
- trait ReadablePath extends AnyRef
- class RelPath extends FilePath with BasePathImpl with SegmentedPath
A relative path on the filesystem.
A relative path on the filesystem. Note that the path is normalized and cannot contain any empty or ".". Parent ".." segments can only occur at the left-end of the path, and are collapsed into a single number ups.
- case class ResourceNotFoundException(path: ResourcePath) extends Exception with Product with Serializable
Thrown when you try to read from a resource that doesn't exist.
- class ResourcePath extends BasePathImpl with ReadablePath with SegmentedPath
Represents path to a resource on the java classpath.
Represents path to a resource on the java classpath.
Classloaders are tricky: http://stackoverflow.com/questions/12292926
- sealed trait ResourceRoot extends AnyRef
Represents a possible root where classpath resources can be loaded from; either a ResourceRoot.ClassLoader or a ResourceRoot.Class.
Represents a possible root where classpath resources can be loaded from; either a ResourceRoot.ClassLoader or a ResourceRoot.Class. Resources loaded from classloaders are always loaded via their absolute path, while resources loaded via classes are always loaded relatively.
- trait SeekableSource extends Source
A source which is guaranteeds to provide a SeekableByteChannel
- trait SegmentedPath extends BasePath
- case class Shellable(value: Seq[String]) extends Product with Serializable
An implicit wrapper defining the things that can be "interpolated" directly into a subprocess call.
- trait Source extends Writable
A source of bytes; must provide either an InputStream or a SeekableByteChannel to read from.
A source of bytes; must provide either an InputStream or a SeekableByteChannel to read from. Can be constructed implicitly from strings, byte arrays, inputstreams, channels or file paths
- case class StatInfo(size: Long, mtime: FileTime, ctime: FileTime, atime: FileTime, fileType: FileType) extends Product with Serializable
The result from doing an system
stat
on a particular path.The result from doing an system
stat
on a particular path.Created via
stat! filePath
.If you want more information, use
stat.full
- class SubPath extends FilePath with BasePathImpl with SegmentedPath
A relative path on the filesystem, without any
..
or.
segments - class SubProcess extends AutoCloseable
Represents a spawn subprocess that has started and may or may not have completed.
- case class SubprocessException(result: CommandResult) extends Exception with Product with Serializable
Thrown when a shellout command results in a non-zero exit code.
Thrown when a shellout command results in a non-zero exit code.
Doesn't contain any additional information apart from the CommandResult that is normally returned, but ensures that failures in subprocesses happen loudly and won't get ignored unless intentionally caught
- trait WritableLowPri extends AnyRef
- case class proc(command: Shellable*) extends Product with Serializable
Convenience APIs around java.lang.Process and java.lang.ProcessBuilder:
Convenience APIs around java.lang.Process and java.lang.ProcessBuilder:
- os.proc.call provides a convenient wrapper for "function-like" processes that you invoke with some input, whose entire output you need, but otherwise do not have any intricate back-and-forth communication
- os.proc.stream provides a lower level API: rather than providing the output all at once, you pass in callbacks it invokes whenever there is a chunk of output received from the spawned process.
- os.proc(...) provides the lowest level API: an simple Scala API around java.lang.ProcessBuilder, that spawns a normal java.lang.Process for you to deal with. You can then interact with it normally through the standard stdin/stdout/stderr streams, using whatever protocol you want
Value Members
- val Generator: geny.Generator.type
- implicit def GlobSyntax(s: StringContext): GlobInterpolator
- val home: Path
The user's home directory
- val pwd: Path
The current working directory for this process.
- val rel: RelPath
- def resource(implicit resRoot: ResourceRoot = Thread.currentThread().getContextClassLoader): ResourcePath
- val root: Path
The root of the filesystem
- val sub: SubPath
- val up: RelPath
- object /
Extractor to let you easily pattern match on os.Paths.
Extractor to let you easily pattern match on os.Paths. Lets you do
@ val base/segment/filename = pwd base: Path = Path(Vector("Users", "haoyi", "Dropbox (Personal)")) segment: String = "Workspace" filename: String = "Ammonite"
To break apart a path and extract various pieces of it.
- object BasePath
- object FilePath
- object FileType
- object GlobInterpolator
- object Inherit extends ProcessInput with ProcessOutput
Inherit the input/output stream from the current process
- object Internals
- object Path
- object PathChunk
- object PathConvertible
- object PathError
- object PermSet extends Serializable
- object Pipe extends ProcessInput with ProcessOutput
Pipe the input/output stream to the current process to be used via
java.lang.Process#{getInputStream,getOutputStream,getErrorStream}
- object PosixStatInfo extends Serializable
- object ProcessInput
- object ProcessOutput
- object RelPath
- object ResourcePath
- object ResourceRoot
- object SeekableSource
- object Shellable extends Serializable
- object Source extends WritableLowPri
- object StatInfo extends Serializable
- object SubPath
- object SubProcess
- object copy
Copy a file or folder from one path to another.
Copy a file or folder from one path to another. Recursively copies folders with all their contents. Errors out if the destination path already exists, or is within the source path.
- object exists extends (Path) => Boolean
Checks if a file or folder exists at the given path.
- object followLink extends (Path) => Option[Path]
Attempts to any symbolic links in the given path and return the canonical path.
Attempts to any symbolic links in the given path and return the canonical path. Returns
None
if the path cannot be resolved (i.e. some symbolic link in the given path is broken) - object group extends (Path) => GroupPrincipal
Get the owning group of the file/folder at the given path
- object hardlink
Creates a hardlink between two paths
- object isDir extends (Path) => Boolean
Checks whether the given path is a directory
Checks whether the given path is a directory
Returns
false
if the path does not exist - object isFile extends (Path) => Boolean
Checks whether the given path is a regular file
Checks whether the given path is a regular file
Returns
false
if the path does not exist - object isLink extends (Path) => Boolean
Checks whether the given path is a symbolic link
Checks whether the given path is a symbolic link
Returns
false
if the path does not exist - object list extends (Path) => IndexedSeq[Path]
Returns all the files and folders directly within the given folder.
Returns all the files and folders directly within the given folder. If the given path is not a folder, raises an error. Can be called with list.stream to return an iterator. To list files recursively, use walk
For convenience
os.list
sorts the entries in the folder before returning them. You can disable sorted by passing in the flagsort = false
. - object makeDir extends (Path) => Unit
Create a single directory at the specified path.
Create a single directory at the specified path. Optionally takes in a PermSet to specify the filesystem permissions of the created directory.
Errors out if the directory already exists, or if the parent directory of the specified path does not exist. To automatically create enclosing directories and ignore the destination if it already exists, using os.makeDir.all
- object move
Moves a file or folder from one path to another.
Moves a file or folder from one path to another. Errors out if the destination path already exists, or is within the source path.
- object mtime extends (Path) => Long
Gets the mtime of the given file or directory
- object owner extends (Path) => UserPrincipal
Get the owner of the file/folder at the given path
- object perms extends (Path) => PermSet
Get the filesystem permissions of the file/folder at the given path
- object read extends (ReadablePath) => String
Reads the contents of a os.Path or other os.Source as a
java.lang.String
. - object readLink extends (Path) => FilePath
Reads the destination that the given symbolic link is pointed to
- object remove extends (Path) => Unit
Roughly equivalent to bash's
rm -rf
.Roughly equivalent to bash's
rm -rf
. Deletes any files or folders in the target path, or does nothing if there aren't any - object size extends (Path) => Long
Gets the size of the given file or folder
Gets the size of the given file or folder
Throws an exception if the file or folder does not exist
When called on folders, returns the size of the folder metadata (i.e. the list of children names), and not the size of the folder's recursive contents. Use os.walk if you want to sum up the total size of a directory tree.
- object stat extends (Path) => StatInfo
Reads in the basic filesystem metadata for the given file.
Reads in the basic filesystem metadata for the given file. By default follows symbolic links to read the metadata of whatever the link is pointing at; set
followLinks = false
to disable that and instead read the metadata of the symbolic link itself.Throws an exception if the file or folder does not exist
- object symlink
Creates a symbolic link between two paths
- object temp
Alias for
java.nio.file.Files.createTempFile
andjava.io.File.deleteOnExit
.Alias for
java.nio.file.Files.createTempFile
andjava.io.File.deleteOnExit
. Pass indeleteOnExit = false
if you want the temp file to stick around. - object truncate
Truncate the given file to the given size.
Truncate the given file to the given size. If the file is smaller than the given size, does nothing.
- object walk
Recursively walks the given folder and returns the paths of every file or folder within.
Recursively walks the given folder and returns the paths of every file or folder within.
You can pass in a
skip
callback to skip files or folders you are not interested in. This can avoid walking entire parts of the folder hierarchy, saving time as compared to filtering them after the fact.By default, the paths are returned as a pre-order traversal: the enclosing folder is occurs first before any of it's contents. You can pass in
preOrder = false
to turn it into a post-order traversal, such that the enclosing folder occurs last after all it's contents.os.walk
returns but does not follow symlinks; pass infollowLinks = true
to override that behavior. You can also specify a maximum depth you wish to walk via themaxDepth
parameter. - object write
Write some data to a file.
Write some data to a file. This can be a String, an Array[Byte], or a Seq[String] which is treated as consecutive lines. By default, this fails if a file already exists at the target location. Use write.over or write.append if you want to over-write it or add to what's already there.