266 lines
10 KiB
Common Lisp
266 lines
10 KiB
Common Lisp
(uiop:define-package #:ambrevar/shell
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(:documentation "Shell-like utilities.")
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(:nicknames #:$)
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(:use #:common-lisp)
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(:use #:trivia)
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(:import-from #:serapeum #:export-always))
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(in-package #:ambrevar/shell)
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(eval-when (:compile-toplevel :load-toplevel :execute)
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(trivial-package-local-nicknames:add-package-local-nickname :alex :alexandria)
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(trivial-package-local-nicknames:add-package-local-nickname :sera :serapeum))
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(defun assert-program (program &rest more-programs) ; TODO: Is this useful for a REPL?
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(sera:and-let* ((missing-programs
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(delete-if #'sera:resolve-executable (cons program more-programs))))
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(error "Missing programs: ~{~a~,^, ~}" missing-programs)))
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(export-always 'file-extension)
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(defun file-extension (file)
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"Return the file extension.
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If none, return the empty string unlike `pathname-type'."
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(or (pathname-type file)
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""))
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(export-always 'file-basename)
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(defun file-basename (file)
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"Return the file basename (including the extension)."
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(apply #'str:concat (pathname-name file)
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(sera:and-let* ((ext (file-extension file)))
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`("." ,ext))))
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(export-always 'match-extensions)
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(defun match-extensions (extension &rest more-extensions)
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"Return a predicate for files that match on of the provided extensions.
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Useful for `finder'."
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(lambda (file)
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(some (lambda (ext)
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(string= ext (pathname-type file)))
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(cons extension more-extensions))))
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(export-always 'match-name)
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(defun match-name (name &rest more-names)
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"Return a predicate that matches when one of the names is contained in the
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file basename.
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Basename includes the extension. Useful for `finder'."
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(lambda (file)
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(some (lambda (name)
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(str:contains? name (file-basename file)))
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(cons name more-names))))
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(export-always 'match-directory)
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(defun match-directory (&key (empty? t) (non-empty? t) (files? t))
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"Return a predicate that matches on directories.
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If target is a file, return FILES?.
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Useful for `walk'."
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(lambda (directory)
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(if (uiop:directory-exists-p directory)
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(let ((files-or-dirs? (or (uiop:directory-files directory)
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(uiop:subdirectories directory))))
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(or (and empty?
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(not files-or-dirs?))
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(and non-empty?
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files-or-dirs?)))
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files?)))
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(export-always '*finder-include-directories*)
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(defvar *finder-include-directories* t
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"When non-nil `walk' include directories.")
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(export-always 'walk)
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(defun walk (root &rest predicates)
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"List files and directories that satisfy all PREDICATES.
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Without PREDICATES, list all files."
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(let ((result '()))
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(uiop:collect-sub*directories
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(uiop:ensure-directory-pathname root)
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(constantly t) (constantly t)
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(lambda (subdirectory)
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(setf result (nconc result
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(let ((subfiles (append (if *finder-include-directories* (list subdirectory) nil)
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(uiop:directory-files subdirectory))))
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(if predicates
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(delete-if (lambda (file)
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(notany (lambda (pred) (funcall pred file))
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predicates))
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subfiles)
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subfiles))))))
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result))
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(export-always 'finder)
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(defun finder (root &rest predicates)
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"List files in ROOT that satisfy all PREDICATES.
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Without PREDICATES, list all files."
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(let ((*finder-include-directories* nil))
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(apply #'walk root predicates)))
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(export-always 'delete-empty-directory-upward)
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(defun delete-empty-directory-upward (directory)
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"Delete directory and its parents until non-empty.
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Return the first non-deleted directory."
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(or (and (ignore-errors (uiop:delete-empty-directory directory))
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(delete-empty-directory-upward
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(uiop:pathname-parent-directory-pathname
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(uiop:ensure-directory-pathname directory))))
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directory))
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(export-always 'make-directory)
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(defun make-directory (path)
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"Including parents."
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(uiop:ensure-all-directories-exist (list (uiop:ensure-directory-pathname path)))
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path)
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(defun kill (pids &key (signal 'term) options)
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"OPTIONS are PKILL options."
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;; TODO: Is it possible to kill a group without pkill, maybe with osicat?
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(uiop:run-program
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(append
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(list (if options "pkill" "kill") (format nil "-~a" signal))
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options
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(mapcar #'princ-to-string pids))))
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(defun terminate-process-with-group (process-info)
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(when (uiop:process-alive-p process-info)
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(kill (list (format nil "~a" (osicat-posix:getpgid (uiop:process-info-pid process-info))))
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:signal 'term ;TODO: -KILL instead?
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:options '("-g"))
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(uiop:terminate-process process-info)))
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(defvar *process-list* '()
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"List of processes started from `run'.")
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(export-always 'terminate-dangling-processes)
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(defun terminate-dangling-processes ()
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(mapc #'terminate-process-with-group *process-list*)
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;; TODO: Maybe don't flush the list in case some processes failed to be terminated.
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;; Use -KILL to fix this?
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(setf *process-list* nil))
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(defun %run (command &key (output :stream) (error-output *error-output*))
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(assert-program "pkill") ; For `terminate-process-with-group'.
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(flet ((cleanup (process-info)
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(push process-info *process-list*)
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(uiop:wait-process process-info)))
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(setf command (if (listp command)
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(mapcar #'princ-to-string (alex:flatten command))
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command))
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;; TODO: Use :stream directly in launch-program and get stream from
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;; process-info to avoid repeating the launch-program call.
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(match output
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(:stream
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(nth-value
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0
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(uiop:stripln
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(with-output-to-string (out)
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(let ((process-info (uiop:launch-program command
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:output out
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:error-output error-output)))
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(cleanup process-info))))))
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(out
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(let ((process-info (uiop:launch-program command
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:output (match out
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(t *standard-output*)
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(o o))
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:error-output error-output)))
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(cleanup process-info))))))
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(export-always 'run)
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(defun run (command &rest args)
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"Run arguments in a safe manner.
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If on interrupt process gets forked to the background, call
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`terminate-dangling-processes'.
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Output is sent to `*standard-output*'.
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Arguments are automatically converted to strings with `format'.
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Lists are automatically flattened."
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(%run (cons command args) :output t))
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(export-always 'run*)
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(defun run* (command &rest args)
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"Same as `run' but return output as a string."
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(%run (cons command args)))
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(export-always 'sh)
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(defun sh (shell-command)
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"Like `run' but for shell commands."
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(%run shell-command :output t))
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(export-always 'sh*)
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(defun sh* (shell-command)
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"Like `sh' but return output as a string."
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(%run shell-command))
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(export-always 'disk-usage)
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(defun disk-usage (files)
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"Return disk usage of FILES in octets.
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As a second value, return a list of (FILE SIZE) pairs, biggest file first."
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(let ((pairs (mapcar (lambda (f)
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(list f (or (trivial-file-size:file-size-in-octets f)
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0)))
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files)))
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(values
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(reduce #'+ (mapcar #'second pairs))
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(sort
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pairs
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#'> :key #'second))))
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(export-always 'tokenize)
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(defun tokenize (string)
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"Return list of STRING lines, where each line is a list of each word."
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(mapcar (lambda (line)
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(delete "" (ppcre:split "\\s+" line) :test #'string=))
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(str:split (string #\newline) string)))
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(export-always 'port-process)
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(defun port-process (port)
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"Return process PID using PORT, NIL is none.
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Return process name as second value."
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(sera:and-let* ((ss-line (first
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(tokenize
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(run* "ss"
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"--no-header"
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"--listening"
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"--tcp"
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"--processes"
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(format nil "( dport = :~a or sport = :~a )" port port)))))
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(process-desc (first (last ss-line)))
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(process-desc-no-prefix (second (str:split ":" process-desc)))
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(process-props (first
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(read-from-string
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(str:replace-all "," " " process-desc-no-prefix))))
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(process-name (first process-props))
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(process-pid-prop (find-if (lambda (prop) (str:starts-with? "PID=" (string prop))) process-props))
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(process-pid-string (second (str:split "=" (string process-pid-prop))))
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(process-pid (parse-integer process-pid-string)))
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(values
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process-pid
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process-name)))
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(export-always 'checksum)
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(defun checksum (file) ; TODO: Use pure CL version.
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"Return checksum of FILE."
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(first (first (tokenize (run* "sha1sum" file)))))
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(export-always 'relative-path)
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(defun relative-path (path &optional (parent-directory *default-pathname-defaults*))
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"Return PATH relative to PARENT-DIRECTORY.
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If PARENT-DIRECTORY is not a parent of PATH, return PATH."
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(or (uiop:subpathp (uiop:merge-pathnames* path) ; The `merge-pathnames*' ensure PATH is absolute.
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(uiop:ensure-directory-pathname parent-directory))
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path))
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(export-always 'toggle-interpol-readtable)
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(defun toggle-interpol-readtable ()
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(if (eq *readtable* (named-readtables:find-readtable :interpol-syntax))
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(named-readtables:in-readtable :standard)
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(named-readtables:in-readtable :interpol-syntax)))
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(export-always 'move-file)
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(defun move-file (source destination)
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"`rename-file' does not work cross-device, in particular it does not work on
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different Btrfs subvolumes."
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(uiop:run-program (list "mv"
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;; Use native-namestring in case path contains escaped
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;; character, like "\\[".
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(uiop:native-namestring source)
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(uiop:native-namestring destination))))
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