483 lines
20 KiB
EmacsLisp
483 lines
20 KiB
EmacsLisp
;;; helm-locate.el --- helm interface for locate. -*- lexical-binding: t -*-
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;; Copyright (C) 2012 ~ 2021 Thierry Volpiatto
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;; NOTE for WINDOZE users:
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;; You have to install Everything with his command line interface here:
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;; http://www.voidtools.com/download.php
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;;; Code:
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(require 'cl-lib)
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(require 'helm)
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(require 'helm-types)
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(require 'helm-help)
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(defvar helm-ff-default-directory)
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(declare-function helm-read-file-name "helm-mode")
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(defgroup helm-locate nil
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"Locate related Applications and libraries for Helm."
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:group 'helm)
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(defcustom helm-locate-db-file-regexp "m?locate\\.db$"
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"Default regexp to match locate database.
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If nil Search in all files."
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:type 'string)
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(defcustom helm-ff-locate-db-filename "locate.db"
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"The basename of the locatedb file you use locally in your directories.
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When this is set and Helm finds such a file in the directory from
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where you launch locate, it will use this file and will not
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prompt you for a db file.
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Note that this happen only when locate is launched with a prefix
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arg."
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:type 'string)
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(defcustom helm-locate-command nil
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"A list of arguments for locate program.
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Helm will calculate a default value for your system on startup
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unless `helm-locate-command' is non-nil.
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Here are the default values it will use according to your system:
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Gnu/linux: \"locate %s -e -A --regex %s\"
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berkeley-unix: \"locate %s %s\"
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windows-nt: \"es %s %s\"
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Others: \"locate %s %s\"
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This string will be passed to format so it should end with `%s'.
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The first format spec is used for the \"-i\" value of locate/es,
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so don't set it directly but use `helm-locate-case-fold-search'
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for this.
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The last option must be the one preceding pattern i.e \"-r\" or
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\"--regex\".
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You will be able to pass other options such as \"-b\" or \"l\"
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during Helm invocation after entering pattern only when multi
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matching, not when fuzzy matching.
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Note that the \"-b\" option is added automatically by Helm when
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var `helm-locate-fuzzy-match' is non-nil and switching back from
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multimatch to fuzzy matching (this is done automatically when a
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space is detected in pattern)."
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:type 'string)
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(defcustom helm-locate-create-db-command
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"updatedb -l 0 -o '%s' -U '%s'"
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"Command used to create a locale locate db file."
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:type 'string)
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(defcustom helm-locate-case-fold-search helm-case-fold-search
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"It have the same meaning as `helm-case-fold-search'.
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The -i option of locate will be used depending of value of
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`helm-pattern' when this is set to \\='smart.
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When nil \"-i\" will not be used at all and when non-nil it will
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always be used.
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NOTE: the -i option of the \"es\" command used on windows does
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the opposite of \"locate\" command."
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:type 'symbol)
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(defcustom helm-locate-fuzzy-match nil
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"Enable fuzzy matching in `helm-locate'.
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Note that when this is enabled searching is done on basename."
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:type 'boolean)
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(defcustom helm-locate-fuzzy-sort-fn
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#'helm-locate-default-fuzzy-sort-fn
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"Default fuzzy matching sort function for locate."
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:type 'boolean)
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(defcustom helm-locate-project-list nil
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"A list of directories, your projects.
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When set, allow browsing recursively files in all directories of
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this list with `helm-projects-find-files'."
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:type '(repeat string))
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(defcustom helm-locate-recursive-dirs-command "locate -i -e -A --regex '^%s' '%s.*$'"
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"Command used for recursive directories completion in `helm-find-files'.
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For Windows and `es' use something like \"es -r ^%s.*%s.*$\"
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The two format specs are mandatory.
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If for some reasons you can't use locate because your filesystem
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doesn't have a database, you can use find command from findutils
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but be aware that it will be much slower. See `helm-find-files'
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embedded help for more infos."
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:type 'string
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:group 'helm-files)
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(defvar helm-locate-map
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(let ((map (make-sparse-keymap)))
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(set-keymap-parent map helm-generic-files-map)
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(define-key map (kbd "DEL") 'helm-delete-backward-no-update)
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map))
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(defface helm-locate-finish
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`((t ,@(and (>= emacs-major-version 27) '(:extend t))
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:foreground "Green"))
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"Face used in mode line when locate process is finish."
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:group 'helm-locate)
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(defun helm-ff-find-locatedb (&optional from-ff)
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"Try to find if a local locatedb file is available.
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The search is done in `helm-ff-default-directory' or falls back to
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`default-directory' if FROM-FF is nil."
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(helm-aif (and helm-ff-locate-db-filename
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(locate-dominating-file
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(or (and from-ff
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helm-ff-default-directory)
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default-directory)
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helm-ff-locate-db-filename))
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(expand-file-name helm-ff-locate-db-filename it)))
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(defun helm-locate-create-db-default-function (db-name directory)
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"Default function used to create a locale locate db file.
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Argument DB-NAME name of the db file.
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Argument DIRECTORY root of file system subtree to scan."
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(format helm-locate-create-db-command
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db-name (expand-file-name directory)))
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(defvar helm-locate-create-db-function
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#'helm-locate-create-db-default-function
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"Function used to create a locale locate db file.
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It should receive the same arguments as
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`helm-locate-create-db-default-function'.")
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(defun helm-locate-1 (&optional localdb init from-ff default)
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"Generic function to run Locate.
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Prefix arg LOCALDB when (4) search and use a local locate db file
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when it exists or create it, when (16) force update of existing
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db file even if exists.
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It has no effect when locate command is \\='es'. INIT is a string
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to use as initial input in prompt.
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See `helm-locate-with-db' and `helm-locate'."
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(require 'helm-mode)
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(helm-locate-set-command)
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(let ((pfn (lambda (candidate)
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(if (file-directory-p candidate)
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(message "Error: The locate Db should be a file")
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(if (= (shell-command
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(funcall helm-locate-create-db-function
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candidate
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helm-ff-default-directory))
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0)
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(message "New locatedb file `%s' created" candidate)
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(error "Failed to create locatedb file `%s'" candidate)))))
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(locdb (and localdb
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(not (string-match "^es" helm-locate-command))
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(or (and (equal '(4) localdb)
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(helm-ff-find-locatedb from-ff))
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(helm-read-file-name
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"Create Locate Db file: "
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:initial-input (expand-file-name "locate.db"
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(or helm-ff-default-directory
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default-directory))
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:preselect helm-locate-db-file-regexp
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:test (lambda (x)
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(if helm-locate-db-file-regexp
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;; Select only locate db files and directories
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;; to allow navigation.
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(or (string-match
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helm-locate-db-file-regexp x)
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(file-directory-p x))
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x)))))))
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(when (and locdb (or (equal localdb '(16))
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(not (file-exists-p locdb))))
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(funcall pfn locdb))
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(helm-locate-with-db (and localdb locdb) init default)))
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(defun helm-locate-set-command ()
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"Setup `helm-locate-command' if not already defined."
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(unless helm-locate-command
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(setq helm-locate-command
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(cl-case system-type
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(gnu/linux "locate %s -e -A --regex %s")
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(berkeley-unix "locate %s %s")
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(windows-nt "es %s %s")
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(t "locate %s %s")))))
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(defun helm-locate-initial-setup ()
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(require 'helm-for-files)
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(helm-locate-set-command))
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(defvar helm-file-name-history nil)
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(defun helm-locate-with-db (&optional db initial-input default)
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"Run locate -d DB.
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If DB is not given or nil use locate without -d option.
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Argument DB can be given as a string or list of db files.
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Argument INITIAL-INPUT is a string to use as initial-input.
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See also `helm-locate'."
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(require 'helm-files)
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(when (and db (stringp db)) (setq db (list db)))
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(helm-locate-set-command)
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(let ((helm-locate-command
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(if db
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(replace-regexp-in-string
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"locate"
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(format (if helm-locate-fuzzy-match
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"locate -b -d '%s'" "locate -d '%s'")
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(mapconcat 'identity
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;; Remove eventually
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;; marked directories by error.
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(cl-loop for i in db
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unless (file-directory-p i)
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;; expand-file-name to resolve
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;; abbreviated fnames not
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;; expanding inside single
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;; quotes i.e. '%s'.
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collect (expand-file-name i))
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":"))
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helm-locate-command)
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(if (and helm-locate-fuzzy-match
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(not (string-match-p "\\`locate -b" helm-locate-command)))
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(replace-regexp-in-string
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"\\`locate" "locate -b" helm-locate-command)
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helm-locate-command))))
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(setq helm-file-name-history (mapcar 'helm-basename file-name-history))
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(helm :sources 'helm-source-locate
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:buffer "*helm locate*"
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:ff-transformer-show-only-basename nil
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:input initial-input
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:default default
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:history 'helm-file-name-history)))
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(defun helm-locate-update-mode-line (process-name)
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"Update mode-line with PROCESS-NAME status information."
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(with-helm-window
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(setq mode-line-format
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`(" " mode-line-buffer-identification " "
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(:eval (format "L%s" (helm-candidate-number-at-point))) " "
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(:eval (propertize
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(format "[%s process finished - (%s results)]"
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(max (1- (count-lines
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(point-min) (point-max)))
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0)
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,process-name)
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'face 'helm-locate-finish))))
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(force-mode-line-update)))
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(defun helm-locate--default-process-coding-system ()
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"Fix `default-process-coding-system' in locate for Windows systems."
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;; This is an attempt to fix issue #1322.
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(if (and (eq system-type 'windows-nt)
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(boundp 'w32-ansi-code-page))
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(let ((code-page-eol
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(intern (format "cp%s-%s" w32-ansi-code-page "dos"))))
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(if (ignore-errors (check-coding-system code-page-eol))
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(cons code-page-eol code-page-eol)
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default-process-coding-system))
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default-process-coding-system))
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(defun helm-locate-init ()
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"Initialize async locate process for `helm-source-locate'."
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(let* ((default-process-coding-system
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(helm-locate--default-process-coding-system))
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(locate-is-es (string-match "\\`es" helm-locate-command))
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(real-locate (string-match "\\`locate" helm-locate-command))
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(case-sensitive-flag (if locate-is-es "-i" ""))
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(ignore-case-flag (if (or locate-is-es
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(not real-locate)) "" "-i"))
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(args (helm-mm-split-pattern helm-pattern))
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(cmd (format helm-locate-command
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(cl-case helm-locate-case-fold-search
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(smart (let ((case-fold-search nil))
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(if (string-match "[[:upper:]]" helm-pattern)
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case-sensitive-flag
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ignore-case-flag)))
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(t (if helm-locate-case-fold-search
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ignore-case-flag
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case-sensitive-flag)))
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(helm-aif (cdr args)
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(concat
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;; The pattern itself.
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(shell-quote-argument (car args)) " "
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;; Possible locate args added
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;; after pattern, don't quote them.
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(mapconcat 'identity it " "))
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(shell-quote-argument (car args)))))
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(default-directory (if (file-directory-p default-directory)
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default-directory "/")))
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(helm-log "Starting helm-locate process")
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(helm-log "Command line used was:\n\n%s"
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(concat ">>> " (propertize cmd 'face 'font-lock-comment-face) "\n\n"))
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(prog1
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(start-process-shell-command
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"locate-process" helm-buffer
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cmd)
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(set-process-sentinel
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(get-buffer-process helm-buffer)
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(lambda (process event)
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(let* ((err (process-exit-status process))
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(noresult (= err 1)))
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(cond (noresult
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(with-helm-buffer
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(unless (cdr helm-sources)
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(insert (concat "* Exit with code 1, no result found,"
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" command line was:\n\n "
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cmd)))))
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((string= event "finished\n")
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(when (and helm-locate-fuzzy-match
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(not (string-match-p "\\s-" helm-pattern)))
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(helm-redisplay-buffer))
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(helm-locate-update-mode-line "Locate"))
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(t
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(helm-log "Error: Locate %s"
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(replace-regexp-in-string "\n" "" event))))))))))
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(defun helm-locate-default-fuzzy-sort-fn (candidates)
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"Default sort function for files in fuzzy matching.
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Sort is done on basename of CANDIDATES."
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(helm-fuzzy-matching-default-sort-fn-1 candidates nil t))
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(defclass helm-locate-override-inheritor (helm-type-file) ())
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(defclass helm-locate-source (helm-source-async helm-locate-override-inheritor)
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((init :initform 'helm-locate-initial-setup)
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(candidates-process :initform 'helm-locate-init)
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(requires-pattern :initform 3)
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(history :initform 'helm-file-name-history)
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(persistent-action :initform 'helm-ff-kill-or-find-buffer-fname)
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(candidate-number-limit :initform 9999)
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(redisplay :initform (progn helm-locate-fuzzy-sort-fn))))
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;; Override helm-type-file class keymap.
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(cl-defmethod helm--setup-source :after ((source helm-locate-override-inheritor))
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(setf (slot-value source 'keymap) helm-locate-map)
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(setf (slot-value source 'group) 'helm-locate))
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(defvar helm-source-locate
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(helm-make-source "Locate" 'helm-locate-source
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:pattern-transformer 'helm-locate-pattern-transformer
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;; :match-part is only used here to tell helm which part
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;; of candidate to highlight.
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:match-part (lambda (candidate)
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(if (or (string-match-p " -b\\'" helm-pattern)
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(and helm-locate-fuzzy-match
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(not (string-match "\\s-" helm-pattern))))
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(helm-basename candidate)
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candidate))))
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(defun helm-locate-pattern-transformer (pattern)
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(if helm-locate-fuzzy-match
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;; When fuzzy is enabled helm add "-b" option on startup.
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(cond ((string-match-p " " pattern)
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(when (string-match "\\`locate -b" helm-locate-command)
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(setq helm-locate-command
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(replace-match "locate" t t helm-locate-command)))
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pattern)
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(t
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(unless (string-match-p "\\`locate -b" helm-locate-command)
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(setq helm-locate-command
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(replace-regexp-in-string
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"\\`locate" "locate -b" helm-locate-command)))
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(helm--mapconcat-pattern pattern)))
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pattern))
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(defun helm-locate-find-dbs-in-projects (&optional update)
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(let* ((pfn (lambda (candidate directory)
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(unless (= (shell-command
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(funcall helm-locate-create-db-function
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candidate
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directory))
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0)
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(error "Failed to create locatedb file `%s'" candidate)))))
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(cl-loop for p in helm-locate-project-list
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for db = (expand-file-name
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helm-ff-locate-db-filename
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(file-name-as-directory p))
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if (and (null update) (file-exists-p db))
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collect db
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else do (funcall pfn db p)
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and collect db)))
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;;; Directory completion for hff.
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;;
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(defclass helm-locate-subdirs-source (helm-source-in-buffer)
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((basedir :initarg :basedir
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:initform nil
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:custom string)
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(subdir :initarg :subdir
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:initform nil
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:custom 'string)
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(data :initform #'helm-locate-init-subdirs)
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(group :initform 'helm-locate)))
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(defun helm-locate-init-subdirs ()
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(with-temp-buffer
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(call-process-shell-command
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(if (string-match-p "\\`fd" helm-locate-recursive-dirs-command)
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(format helm-locate-recursive-dirs-command
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;; fd pass path at end.
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(helm-get-attr 'subdir) (helm-get-attr 'basedir))
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(format helm-locate-recursive-dirs-command
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(if (string-match-p "\\`es" helm-locate-recursive-dirs-command)
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;; Fix W32 paths.
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(replace-regexp-in-string
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"/" "\\\\\\\\" (helm-get-attr 'basedir))
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(helm-get-attr 'basedir))
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(helm-get-attr 'subdir)))
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nil t nil)
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(buffer-string)))
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;;;###autoload
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(defun helm-projects-find-files (update)
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"Find files with locate in `helm-locate-project-list'.
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With a prefix arg refresh the database in each project."
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(interactive "P")
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(helm-locate-set-command)
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(cl-assert (and (string-match-p "\\`locate" helm-locate-command)
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(executable-find "updatedb"))
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nil "Unsupported locate version")
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(let ((dbs (helm-locate-find-dbs-in-projects update)))
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(if dbs
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(helm-locate-with-db dbs)
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(user-error "No projects found, please setup `helm-locate-project-list'"))))
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;;;###autoload
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(defun helm-locate (arg)
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"Preconfigured `helm' for Locate.
|
||
Note: you can add locate options after entering pattern.
|
||
See \\='man locate' for valid options and also `helm-locate-command'.
|
||
|
||
You can specify a local database with prefix argument ARG.
|
||
With two prefix arg, refresh the current local db or create it if
|
||
it doesn't exists.
|
||
|
||
To create a user specific db, use
|
||
\"updatedb -l 0 -o db_path -U directory\".
|
||
Where db_path is a filename matched by
|
||
`helm-locate-db-file-regexp'."
|
||
(interactive "P")
|
||
(helm-set-local-variable 'helm-async-outer-limit-hook
|
||
(list (lambda ()
|
||
(when (and helm-locate-fuzzy-match
|
||
(not (string-match-p
|
||
"\\s-" helm-pattern)))
|
||
(helm-redisplay-buffer)))))
|
||
(setq helm-ff-default-directory default-directory)
|
||
(helm-locate-1 arg nil nil (thing-at-point 'filename)))
|
||
|
||
(provide 'helm-locate)
|
||
|
||
;;; helm-locate.el ends here
|