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files.clj
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files.clj
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(ns pathological.files
(:refer-clojure :exclude [find])
(:require
[pathological.paths :as p]
[pathological.utils
:refer [->charset
->copy-options-array
->file-attributes-array
->open-options-array
->link-options-array
->file-visit-options-array
->file-visit-options-set
->file-visit-result]]
[pathological.paths :as paths])
(:import
[java.nio.file Files
FileVisitor
Path]
[java.nio.charset Charset
StandardCharsets]
[java.nio.file.attribute PosixFilePermissions]
[java.util.function BiPredicate]
[java.io InputStream OutputStream]))
(defn read-all-lines
([^Path path]
(read-all-lines path StandardCharsets/UTF_8))
([^Path path ^Charset charset]
(Files/readAllLines path (->charset charset))))
(defn write-lines
([^Path path ^Iterable lines]
(write-lines path lines :utf-8))
([^Path path ^Iterable lines charset & options]
(let [^Charset charset (->charset charset)
^"[Ljava.nio.file.OpenOption;"
open-options (->open-options-array options)]
(Files/write path lines charset open-options))))
(defn create-directories
[^Path path & options]
(let [^"[Ljava.nio.file.attribute.FileAttribute;"
file-attributes (->file-attributes-array options)]
(Files/createDirectories path file-attributes)))
(defn create-directory
[^Path path & options]
(let [^"[Ljava.nio.file.attribute.FileAttribute;"
file-attributes (->file-attributes-array options)]
(Files/createDirectory path file-attributes)))
(defn create-file
[^Path path & options]
(let [^"[Ljava.nio.file.attribute.FileAttribute;"
file-attributes (->file-attributes-array options)]
(Files/createFile path file-attributes)))
(defn create-symbolic-link
[^Path link ^Path target & options]
(let [^"[Ljava.nio.file.attribute.FileAttribute;"
file-attributes (->file-attributes-array options)]
(Files/createSymbolicLink link target file-attributes)))
(defn create-link
[^Path link ^Path target]
(Files/createLink link target))
(defn delete
[^Path path]
(Files/delete path))
(defmulti ^:private do-copy
(fn [source destination _] [(type source) (type destination)]))
(defmethod do-copy [Path Path]
[^Path source ^Path destination
^"[Ljava.nio.file.CopyOption;" copy-options]
(Files/copy source destination copy-options))
(defmethod do-copy [InputStream Path]
[^InputStream source ^Path destination
^"[Ljava.nio.file.CopyOption;" copy-options]
(Files/copy source destination copy-options))
(defmethod do-copy [Path OutputStream]
[^Path source ^OutputStream destination _]
(Files/copy source destination))
(defn copy
[source destination & options]
(let [^"[Ljava.nio.file.CopyOption;"
copy-options (->copy-options-array options)]
(do-copy source destination copy-options)))
(defn move
[source destination & options]
(let [^"[Ljava.nio.file.CopyOption;"
copy-options (->copy-options-array options)]
(Files/move source destination copy-options)))
(defn read-symbolic-link
[^Path path]
(Files/readSymbolicLink path))
(deftype FnBackedBiPredicate
[predicate-fn]
BiPredicate
(test [_ path basic-file-attributes]
(predicate-fn path basic-file-attributes)))
(defn find
[^Path path matcher
& {:keys [file-visit-options
maximum-depth]
:or {file-visit-options []
maximum-depth Integer/MAX_VALUE}}]
(let [file-visit-options (->file-visit-options-array file-visit-options)
matcher (->FnBackedBiPredicate matcher)]
(iterator-seq
(.iterator
(Files/find path maximum-depth matcher file-visit-options)))))
(defn exists?
[^Path path & options]
(let [^"[Ljava.nio.file.LinkOption;"
link-options (->link-options-array options)]
(Files/exists path link-options)))
(defn regular-file?
[^Path path & options]
(let [^"[Ljava.nio.file.LinkOption;"
link-options (->link-options-array options)]
(Files/isRegularFile path link-options)))
(defn directory?
[^Path path & options]
(let [^"[Ljava.nio.file.LinkOption;"
link-options (->link-options-array options)]
(Files/isDirectory path link-options)))
(defn symbolic-link?
[^Path path]
(Files/isSymbolicLink path))
(defn same-file?
[^Path path-1 ^Path path-2]
(Files/isSameFile path-1 path-2))
(defn hidden?
[^Path path]
(Files/isHidden path))
(defn readable?
[^Path path]
(Files/isReadable path))
(defn writable?
[^Path path]
(Files/isWritable path))
(defn executable?
[^Path path]
(Files/isExecutable path))
(defn posix-file-permissions
([string-or-path & options]
(let [^"[Ljava.nio.file.LinkOption;"
link-options (->link-options-array options)]
(if (string? string-or-path)
(PosixFilePermissions/fromString string-or-path)
(Files/getPosixFilePermissions string-or-path link-options)))))
(defn posix-file-permissions-attribute [string]
(PosixFilePermissions/asFileAttribute
(posix-file-permissions string)))
(defn posix-file-permissions-string [^Path path & options]
(PosixFilePermissions/toString
(apply posix-file-permissions (concat [path] options))))
(defn new-input-stream
[^Path path & options]
(let [^"[Ljava.nio.file.OpenOption;"
open-options (->open-options-array options)]
(Files/newInputStream path open-options)))
(defn new-output-stream
[^Path path & options]
(let [^"[Ljava.nio.file.OpenOption;"
open-options (->open-options-array options)]
(Files/newOutputStream path open-options)))
(defn walk
[^Path path
& {:keys [file-visit-options
maximum-depth]
:or {file-visit-options []
maximum-depth Integer/MAX_VALUE}}]
(let [^"[Ljava.nio.file.FileVisitOption;"
file-visit-options (->file-visit-options-array file-visit-options)]
(iterator-seq
(.iterator
(Files/walk path maximum-depth file-visit-options)))))
(defn- invoke-visitor-and-accumulate [visit-fn accumulator-atom path & args]
(let [result @accumulator-atom
{:keys [result control]
:or {result result
control :continue}}
(apply visit-fn (concat [result path] args))]
(swap! accumulator-atom (constantly result))
(->file-visit-result control)))
(deftype FnBackedFileVisitor
[pre-visit-directory-fn
post-visit-directory-fn
visit-file-fn
visit-file-failed-fn
accumulator-atom]
FileVisitor
(preVisitDirectory [_ directory basic-file-attributes]
(invoke-visitor-and-accumulate
pre-visit-directory-fn accumulator-atom directory basic-file-attributes))
(postVisitDirectory [_ file exception]
(invoke-visitor-and-accumulate
post-visit-directory-fn accumulator-atom file exception))
(visitFile [_ file basic-file-attributes]
(invoke-visitor-and-accumulate
visit-file-fn accumulator-atom file basic-file-attributes))
(visitFileFailed [_ file exception]
(invoke-visitor-and-accumulate
visit-file-fn accumulator-atom file exception)))
(defn walk-file-tree
[^Path path
& {:keys [pre-visit-directory-fn
post-visit-directory-fn
visit-file-fn
visit-file-failed-fn
file-visit-options
maximum-depth
initial-value]
:or {pre-visit-directory-fn (fn [_ _ _] {:control :continue})
post-visit-directory-fn (fn [_ _ _] {:control :continue})
visit-file-fn (fn [_ _ _] {:control :continue})
visit-file-failed-fn (fn [_ _ exception] (throw exception))
file-visit-options []
maximum-depth Integer/MAX_VALUE
initial-value nil}}]
(let [accumulator-atom (atom initial-value)
file-visit-options (->file-visit-options-set file-visit-options)]
(Files/walkFileTree path file-visit-options maximum-depth
(->FnBackedFileVisitor
pre-visit-directory-fn
post-visit-directory-fn
visit-file-fn
visit-file-failed-fn
accumulator-atom))
@accumulator-atom))
(defn- parse-definition [[first second :as definition]]
(cond
(and (map? first) (:type first)) [first second]
(vector? first) [{:type :directory} definition]
(map? first) [(assoc first :type :file) second]))
(defn populate-file-tree
[^Path path definition]
(doseq [[name & rest] definition
:let [[attributes rest] (parse-definition rest)
path (p/path path (clojure.core/name name))]]
(condp = (:type attributes)
:directory
(do
(create-directories path)
(when (seq rest)
(populate-file-tree path rest)))
:file
(do
(create-file path)
(when (:content attributes)
(write-lines path (:content attributes))))
:symbolic-link
(do
(assert (:target attributes)
(str "Attribute :target missing for path " path))
(create-symbolic-link path
(p/path (p/file-system path) (:target attributes))))
:link
(do
(assert (:target attributes)
(str "Attribute :target missing for path " path))
(create-link path
(p/path (p/file-system path) (:target attributes)))))))
(defn delete-recursively
[^Path path]
(letfn [(delete-fn [_ path _] (delete path))]
(if (exists? path)
(walk-file-tree path
:visit-file-fn delete-fn
:post-visit-directory-fn delete-fn))))
(defn copy-recursively
[^Path source ^Path destination]
(letfn [(rebase [path]
(paths/resolve destination (paths/relativize source path)))
(create-directory-fn [_ directory _]
(create-directories (rebase directory)))
(copy-fn [_ file _]
(copy file (rebase file)))]
(if (exists? source)
(walk-file-tree source
:pre-visit-directory-fn create-directory-fn
:visit-file-fn copy-fn))))
(defn move-recursively
[^Path source ^Path destination]
(letfn [(rebase [path]
(paths/resolve destination (paths/relativize source path)))
(create-directory-fn [_ directory _]
(create-directories (rebase directory)))
(delete-directory-fn [_ directory _]
(delete directory))
(move-fn [_ file _]
(move file (rebase file)))]
(if (exists? source)
(walk-file-tree source
:pre-visit-directory-fn create-directory-fn
:visit-file-fn move-fn
:post-visit-directory-fn delete-directory-fn))))