(require 'comint)
(defgroup shell nil
"Running shell from within Emacs buffers."
:group 'processes
:group 'unix)
(defgroup shell-directories nil
"Directory support in shell mode."
:group 'shell)
(defgroup shell-faces nil
"Faces in shell buffers."
:group 'shell)
(defcustom shell-dumb-shell-regexp "cmd\\(proxy\\)?\\.exe"
"Regexp to match shells that don't save their command history, and
don't handle the backslash as a quote character. For shells that
match this regexp, Emacs will write out the command history when the
shell finishes, and won't remove backslashes when it unquotes shell
arguments."
:type 'regexp
:group 'shell)
(defcustom shell-prompt-pattern "^[^#$%>\n]*[#$%>] *"
"Regexp to match prompts in the inferior shell.
Defaults to \"^[^#$%>\\n]*[#$%>] *\", which works pretty well.
This variable is used to initialize `comint-prompt-regexp' in the
shell buffer.
If `comint-use-prompt-regexp' is nil, then this variable is only used
to determine paragraph boundaries. See Info node `Shell Prompts' for
how Shell mode treats paragraphs.
The pattern should probably not match more than one line. If it does,
Shell mode may become confused trying to distinguish prompt from input
on lines which don't start with a prompt.
This is a fine thing to set in your `.emacs' file."
:type 'regexp
:group 'shell)
(defcustom shell-completion-fignore nil
"List of suffixes to be disregarded during file/command completion.
This variable is used to initialize `comint-completion-fignore' in the shell
buffer. The default is nil, for compatibility with most shells.
Some people like (\"~\" \"#\" \"%\").
This is a fine thing to set in your `.emacs' file."
:type '(repeat (string :tag "Suffix"))
:group 'shell)
(defvar shell-delimiter-argument-list '(?\| ?& ?< ?> ?\( ?\) ?\ "List of characters to recognize as separate arguments.
This variable is used to initialize `comint-delimiter-argument-list' in the
shell buffer. The value may depend on the operating system or shell.
This is a fine thing to set in your `.emacs' file.")
(defvar shell-file-name-chars
(if (memq system-type '(ms-dos windows-nt cygwin))
"~/A-Za-z0-9_^$!#%&{}@`'.,:()-"
"[]~/A-Za-z0-9+@:_.$#%,={}-")
"String of characters valid in a file name.
This variable is used to initialize `comint-file-name-chars' in the
shell buffer. The value may depend on the operating system or shell.
This is a fine thing to set in your `.emacs' file.")
(defvar shell-file-name-quote-list
(if (memq system-type '(ms-dos windows-nt))
nil
(append shell-delimiter-argument-list '(?\s ?\* ?\! ?\" ?\' ?\` ?\# ?\\)))
"List of characters to quote when in a file name.
This variable is used to initialize `comint-file-name-quote-list' in the
shell buffer. The value may depend on the operating system or shell.
This is a fine thing to set in your `.emacs' file.")
(defvar shell-dynamic-complete-functions
'(comint-replace-by-expanded-history
shell-dynamic-complete-environment-variable
shell-dynamic-complete-command
shell-replace-by-expanded-directory
comint-dynamic-complete-filename)
"List of functions called to perform completion.
This variable is used to initialize `comint-dynamic-complete-functions' in the
shell buffer.
This is a fine thing to set in your `.emacs' file.")
(defcustom shell-command-regexp "[^ "Regexp to match a single command within a pipeline.
This is used for directory tracking and does not do a perfect job."
:type 'regexp
:group 'shell)
(defcustom shell-command-separator-regexp "[;&|\n \t]*"
"Regexp to match a single command within a pipeline.
This is used for directory tracking and does not do a perfect job."
:type 'regexp
:group 'shell)
(defcustom shell-completion-execonly t
"If non-nil, use executable files only for completion candidates.
This mirrors the optional behavior of tcsh.
Detecting executability of files may slow command completion considerably."
:type 'boolean
:group 'shell)
(defcustom shell-popd-regexp "popd"
"Regexp to match subshell commands equivalent to popd."
:type 'regexp
:group 'shell-directories)
(defcustom shell-pushd-regexp "pushd"
"Regexp to match subshell commands equivalent to pushd."
:type 'regexp
:group 'shell-directories)
(defcustom shell-pushd-tohome nil
"If non-nil, make pushd with no arg behave as \"pushd ~\" (like cd).
This mirrors the optional behavior of tcsh."
:type 'boolean
:group 'shell-directories)
(defcustom shell-pushd-dextract nil
"If non-nil, make \"pushd +n\" pop the nth dir to the stack top.
This mirrors the optional behavior of tcsh."
:type 'boolean
:group 'shell-directories)
(defcustom shell-pushd-dunique nil
"If non-nil, make pushd only add unique directories to the stack.
This mirrors the optional behavior of tcsh."
:type 'boolean
:group 'shell-directories)
(defcustom shell-cd-regexp "cd"
"Regexp to match subshell commands equivalent to cd."
:type 'regexp
:group 'shell-directories)
(defcustom shell-chdrive-regexp
(if (memq system-type '(ms-dos windows-nt))
"[]a-zA-Z^_`\\[\\\\]:"
nil)
"If non-nil, is regexp used to track drive changes."
:type '(choice regexp
(const nil))
:group 'shell-directories)
(defcustom shell-dirtrack-verbose t
"If non-nil, show the directory stack following directory change.
This is effective only if directory tracking is enabled."
:type 'boolean
:group 'shell-directories)
(defcustom explicit-shell-file-name nil
"If non-nil, is file name to use for explicitly requested inferior shell."
:type '(choice (const :tag "None" nil) file)
:group 'shell)
(defcustom explicit-csh-args
(if (eq system-type 'hpux)
'("-i" "-T")
'("-i"))
"Args passed to inferior shell by \\[shell], if the shell is csh.
Value is a list of strings, which may be nil."
:type '(repeat (string :tag "Argument"))
:group 'shell)
(defcustom explicit-bash-args
(let* ((prog (or (and (boundp 'explicit-shell-file-name) explicit-shell-file-name)
(getenv "ESHELL") shell-file-name))
(name (file-name-nondirectory prog)))
(if (and (not purify-flag)
(equal name "bash")
(file-executable-p prog)
(string-match "bad option"
(shell-command-to-string
(concat (shell-quote-argument prog)
" --noediting"))))
'("-i")
'("--noediting" "-i")))
"Args passed to inferior shell by \\[shell], if the shell is bash.
Value is a list of strings, which may be nil."
:type '(repeat (string :tag "Argument"))
:group 'shell)
(defcustom shell-input-autoexpand 'history
"If non-nil, expand input command history references on completion.
This mirrors the optional behavior of tcsh (its autoexpand and histlit).
If the value is `input', then the expansion is seen on input.
If the value is `history', then the expansion is only when inserting
into the buffer's input ring. See also `comint-magic-space' and
`comint-dynamic-complete'.
This variable supplies a default for `comint-input-autoexpand',
for Shell mode only."
:type '(choice (const :tag "off" nil)
(const input)
(const history)
(const :tag "on" t))
:group 'shell)
(defvar shell-dirstack nil
"List of directories saved by pushd in this buffer's shell.
Thus, this does not include the shell's current directory.")
(defvar shell-dirtrackp t
"Non-nil in a shell buffer means directory tracking is enabled.")
(defvar shell-last-dir nil
"Keep track of last directory for ksh `cd -' command.")
(defvar shell-dirstack-query nil
"Command used by `shell-resync-dirs' to query the shell.")
(defvar shell-mode-map nil)
(cond ((not shell-mode-map)
(setq shell-mode-map (nconc (make-sparse-keymap) comint-mode-map))
(define-key shell-mode-map "\C-c\C-f" 'shell-forward-command)
(define-key shell-mode-map "\C-c\C-b" 'shell-backward-command)
(define-key shell-mode-map "\t" 'comint-dynamic-complete)
(define-key shell-mode-map "\M-?"
'comint-dynamic-list-filename-completions)
(define-key shell-mode-map [menu-bar completion]
(cons "Complete"
(copy-keymap (lookup-key comint-mode-map [menu-bar completion]))))
(define-key-after (lookup-key shell-mode-map [menu-bar completion])
[complete-env-variable] '("Complete Env. Variable Name" .
shell-dynamic-complete-environment-variable)
'complete-file)
(define-key-after (lookup-key shell-mode-map [menu-bar completion])
[expand-directory] '("Expand Directory Reference" .
shell-replace-by-expanded-directory)
'complete-expand)))
(defcustom shell-mode-hook '()
"*Hook for customising Shell mode."
:type 'hook
:group 'shell)
(defvar shell-font-lock-keywords
'(("[ \t]\\([+-][^ \t\n]+\\)" 1 font-lock-comment-face)
("^[^ \t\n]+:.*" . font-lock-string-face)
("^\\[[1-9][0-9]*\\]" . font-lock-string-face))
"Additional expressions to highlight in Shell mode.")
(put 'shell-mode 'mode-class 'special)
(define-derived-mode shell-mode comint-mode "Shell"
"Major mode for interacting with an inferior shell.\\<shell-mode-map>
\\[comint-send-input] after the end of the process' output sends the text from
the end of process to the end of the current line.
\\[comint-send-input] before end of process output copies the current line minus the prompt to
the end of the buffer and sends it (\\[comint-copy-old-input] just copies the current line).
\\[send-invisible] reads a line of text without echoing it, and sends it to
the shell. This is useful for entering passwords. Or, add the function
`comint-watch-for-password-prompt' to `comint-output-filter-functions'.
If you want to make multiple shell buffers, rename the `*shell*' buffer
using \\[rename-buffer] or \\[rename-uniquely] and start a new shell.
If you want to make shell buffers limited in length, add the function
`comint-truncate-buffer' to `comint-output-filter-functions'.
If you accidentally suspend your process, use \\[comint-continue-subjob]
to continue it.
`cd', `pushd' and `popd' commands given to the shell are watched by Emacs to
keep this buffer's default directory the same as the shell's working directory.
While directory tracking is enabled, the shell's working directory is displayed
by \\[list-buffers] or \\[mouse-buffer-menu] in the `File' field.
\\[dirs] queries the shell and resyncs Emacs' idea of what the current
directory stack is.
\\[dirtrack-mode] turns directory tracking on and off.
\\{shell-mode-map}
Customization: Entry to this mode runs the hooks on `comint-mode-hook' and
`shell-mode-hook' (in that order). Before each input, the hooks on
`comint-input-filter-functions' are run. After each shell output, the hooks
on `comint-output-filter-functions' are run.
Variables `shell-cd-regexp', `shell-chdrive-regexp', `shell-pushd-regexp'
and `shell-popd-regexp' are used to match their respective commands,
while `shell-pushd-tohome', `shell-pushd-dextract' and `shell-pushd-dunique'
control the behavior of the relevant command.
Variables `comint-completion-autolist', `comint-completion-addsuffix',
`comint-completion-recexact' and `comint-completion-fignore' control the
behavior of file name, command name and variable name completion. Variable
`shell-completion-execonly' controls the behavior of command name completion.
Variable `shell-completion-fignore' is used to initialize the value of
`comint-completion-fignore'.
Variables `comint-input-ring-file-name' and `comint-input-autoexpand' control
the initialization of the input ring history, and history expansion.
Variables `comint-output-filter-functions', a hook, and
`comint-scroll-to-bottom-on-input' and `comint-scroll-to-bottom-on-output'
control whether input and output cause the window to scroll to the end of the
buffer."
(setq comint-prompt-regexp shell-prompt-pattern)
(setq comint-completion-fignore shell-completion-fignore)
(setq comint-delimiter-argument-list shell-delimiter-argument-list)
(setq comint-file-name-chars shell-file-name-chars)
(setq comint-file-name-quote-list shell-file-name-quote-list)
(set (make-local-variable 'comint-dynamic-complete-functions)
shell-dynamic-complete-functions)
(set (make-local-variable 'paragraph-separate) "\\'")
(make-local-variable 'paragraph-start)
(setq paragraph-start comint-prompt-regexp)
(make-local-variable 'font-lock-defaults)
(setq font-lock-defaults '(shell-font-lock-keywords t))
(make-local-variable 'shell-dirstack)
(setq shell-dirstack nil)
(make-local-variable 'shell-last-dir)
(setq shell-last-dir nil)
(setq comint-input-autoexpand shell-input-autoexpand)
(make-local-variable 'list-buffers-directory)
(shell-dirtrack-mode 1)
(setq list-buffers-directory (expand-file-name default-directory))
(when (ring-empty-p comint-input-ring)
(let ((shell (file-name-nondirectory (car
(process-command (get-buffer-process (current-buffer)))))))
(setq comint-input-ring-file-name
(or (getenv "HISTFILE")
(cond ((string-equal shell "bash") "~/.bash_history")
((string-equal shell "ksh") "~/.sh_history")
(t "~/.history"))))
(if (or (equal comint-input-ring-file-name "")
(equal (file-truename comint-input-ring-file-name)
(file-truename "/dev/null")))
(setq comint-input-ring-file-name nil))
(if (and comint-input-ring-file-name
(string-match shell-dumb-shell-regexp shell))
(set-process-sentinel (get-buffer-process (current-buffer))
#'shell-write-history-on-exit))
(setq shell-dirstack-query
(cond ((string-equal shell "sh") "pwd")
((string-equal shell "ksh") "echo $PWD ~-")
(t "dirs")))
(when (string-equal shell "bash")
(add-hook 'comint-output-filter-functions
'shell-filter-ctrl-a-ctrl-b nil t)))
(comint-read-input-ring t)))
(defun shell-filter-ctrl-a-ctrl-b (string)
"Remove `^A' and `^B' characters from comint output.
Bash uses these characters as internal quoting characters in its
prompt. Due to a bug in some bash versions (including 2.03,
2.04, and 2.05b), they may erroneously show up when bash is
started with the `--noediting' option and Select Graphic
Rendition (SGR) control sequences (formerly known as ANSI escape
sequences) are used to color the prompt.
This function can be put on `comint-output-filter-functions'.
The argument STRING is ignored."
(let ((pmark (process-mark (get-buffer-process (current-buffer)))))
(save-excursion
(goto-char (or (and (markerp comint-last-output-start)
(marker-position comint-last-output-start))
(point-min)))
(while (re-search-forward "[\C-a\C-b]" pmark t)
(replace-match "")))))
(defun shell-write-history-on-exit (process event)
"Called when the shell process is stopped.
Writes the input history to a history file
`comint-input-ring-file-name' using `comint-write-input-ring'
and inserts a short message in the shell buffer.
This function is a sentinel watching the shell interpreter process.
Sentinels will always get the two parameters PROCESS and EVENT."
(comint-write-input-ring)
(let ((buf (process-buffer process)))
(when (buffer-live-p buf)
(with-current-buffer buf
(insert (format "\nProcess %s %s\n" process event))))))
(defun shell (&optional buffer)
"Run an inferior shell, with I/O through BUFFER (which defaults to `*shell*').
Interactively, a prefix arg means to prompt for BUFFER.
If BUFFER exists but shell process is not running, make new shell.
If BUFFER exists and shell process is running, just switch to BUFFER.
Program used comes from variable `explicit-shell-file-name',
or (if that is nil) from the ESHELL environment variable,
or (if that is nil) from `shell-file-name'.
If a file `~/.emacs_SHELLNAME' exists, or `~/.emacs.d/init_SHELLNAME.sh',
it is given as initial input (but this may be lost, due to a timing
error, if the shell discards input when it starts up).
The buffer is put in Shell mode, giving commands for sending input
and controlling the subjobs of the shell. See `shell-mode'.
See also the variable `shell-prompt-pattern'.
To specify a coding system for converting non-ASCII characters
in the input and output to the shell, use \\[universal-coding-system-argument]
before \\[shell]. You can also specify this with \\[set-buffer-process-coding-system]
in the shell buffer, after you start the shell.
The default comes from `process-coding-system-alist' and
`default-process-coding-system'.
The shell file name (sans directories) is used to make a symbol name
such as `explicit-csh-args'. If that symbol is a variable,
its value is used as a list of arguments when invoking the shell.
Otherwise, one argument `-i' is passed to the shell.
\(Type \\[describe-mode] in the shell buffer for a list of commands.)"
(interactive
(list
(and current-prefix-arg
(read-buffer "Shell buffer: "
(generate-new-buffer-name "*shell*")))))
(setq buffer (get-buffer-create (or buffer "*shell*")))
(pop-to-buffer buffer)
(unless (comint-check-proc buffer)
(let* ((prog (or explicit-shell-file-name
(getenv "ESHELL") shell-file-name))
(name (file-name-nondirectory prog))
(startfile (concat "~/.emacs_" name))
(xargs-name (intern-soft (concat "explicit-" name "-args"))))
(unless (file-exists-p startfile)
(setq startfile (concat "~/.emacs.d/init_" name ".sh")))
(apply 'make-comint-in-buffer "shell" buffer prog
(if (file-exists-p startfile) startfile)
(if (and xargs-name (boundp xargs-name))
(symbol-value xargs-name)
'("-i")))
(shell-mode)))
buffer)
(defun shell-directory-tracker (str)
"Tracks cd, pushd and popd commands issued to the shell.
This function is called on each input passed to the shell.
It watches for cd, pushd and popd commands and sets the buffer's
default directory to track these commands.
You may toggle this tracking on and off with \\[dirtrack-mode].
If Emacs gets confused, you can resync with the shell with \\[dirs].
See variables `shell-cd-regexp', `shell-chdrive-regexp', `shell-pushd-regexp',
and `shell-popd-regexp', while `shell-pushd-tohome', `shell-pushd-dextract',
and `shell-pushd-dunique' control the behavior of the relevant command.
Environment variables are expanded, see function `substitute-in-file-name'."
(if shell-dirtrackp
(condition-case chdir-failure
(let ((start (progn (string-match
(concat "^" shell-command-separator-regexp)
str) (match-end 0)))
end cmd arg1)
(while (string-match shell-command-regexp str start)
(setq end (match-end 0)
cmd (comint-arguments (substring str start end) 0 0)
arg1 (comint-arguments (substring str start end) 1 1))
(if arg1
(setq arg1 (shell-unquote-argument arg1)))
(cond ((string-match (concat "\\`\\(" shell-popd-regexp
"\\)\\($\\|[ \t]\\)")
cmd)
(shell-process-popd (comint-substitute-in-file-name arg1)))
((string-match (concat "\\`\\(" shell-pushd-regexp
"\\)\\($\\|[ \t]\\)")
cmd)
(shell-process-pushd (comint-substitute-in-file-name arg1)))
((string-match (concat "\\`\\(" shell-cd-regexp
"\\)\\($\\|[ \t]\\)")
cmd)
(shell-process-cd (comint-substitute-in-file-name arg1)))
((and shell-chdrive-regexp
(string-match (concat "\\`\\(" shell-chdrive-regexp
"\\)\\($\\|[ \t]\\)")
cmd))
(shell-process-cd (comint-substitute-in-file-name cmd))))
(setq start (progn (string-match shell-command-separator-regexp
str end)
(match-end 0)))))
(error "Couldn't cd"))))
(defun shell-unquote-argument (string)
"Remove all kinds of shell quoting from STRING."
(save-match-data
(let ((idx 0) next inside
(quote-chars
(if (string-match shell-dumb-shell-regexp
(file-name-nondirectory
(car (process-command (get-buffer-process (current-buffer))))))
"['`\"]"
"[\\'`\"]")))
(while (and (< idx (length string))
(setq next (string-match quote-chars string next)))
(cond ((= (aref string next) ?\\)
(setq string (replace-match "" nil nil string))
(setq next (1+ next)))
((and inside (= (aref string next) inside))
(setq string (replace-match "" nil nil string))
(setq inside nil))
(inside
(setq next (1+ next)))
(t
(setq inside (aref string next))
(setq string (replace-match "" nil nil string)))))
string)))
(defun shell-process-popd (arg)
(let ((num (or (shell-extract-num arg) 0)))
(cond ((and num (= num 0) shell-dirstack)
(shell-cd (car shell-dirstack))
(setq shell-dirstack (cdr shell-dirstack))
(shell-dirstack-message))
((and num (> num 0) (<= num (length shell-dirstack)))
(let* ((ds (cons nil shell-dirstack))
(cell (nthcdr (1- num) ds)))
(rplacd cell (cdr (cdr cell)))
(setq shell-dirstack (cdr ds))
(shell-dirstack-message)))
(t
(error "Couldn't popd")))))
(defun shell-prefixed-directory-name (dir)
(if (= (length comint-file-name-prefix) 0)
dir
(if (file-name-absolute-p dir)
(concat comint-file-name-prefix dir)
(expand-file-name dir))))
(defun shell-process-cd (arg)
(let ((new-dir (cond ((zerop (length arg)) (concat comint-file-name-prefix
"~"))
((string-equal "-" arg) shell-last-dir)
(t (shell-prefixed-directory-name arg)))))
(setq shell-last-dir default-directory)
(shell-cd new-dir)
(shell-dirstack-message)))
(defun shell-process-pushd (arg)
(let ((num (shell-extract-num arg)))
(cond ((zerop (length arg))
(cond (shell-pushd-tohome
(shell-process-pushd (concat comint-file-name-prefix "~")))
(shell-dirstack
(let ((old default-directory))
(shell-cd (car shell-dirstack))
(setq shell-dirstack (cons old (cdr shell-dirstack)))
(shell-dirstack-message)))
(t
(message "Directory stack empty."))))
((numberp num)
(cond ((> num (length shell-dirstack))
(message "Directory stack not that deep."))
((= num 0)
(error (message "Couldn't cd")))
(shell-pushd-dextract
(let ((dir (nth (1- num) shell-dirstack)))
(shell-process-popd arg)
(shell-process-pushd default-directory)
(shell-cd dir)
(shell-dirstack-message)))
(t
(let* ((ds (cons default-directory shell-dirstack))
(dslen (length ds))
(front (nthcdr num ds))
(back (reverse (nthcdr (- dslen num) (reverse ds))))
(new-ds (append front back)))
(shell-cd (car new-ds))
(setq shell-dirstack (cdr new-ds))
(shell-dirstack-message)))))
(t
(let ((old-wd default-directory))
(shell-cd (shell-prefixed-directory-name arg))
(if (or (null shell-pushd-dunique)
(not (member old-wd shell-dirstack)))
(setq shell-dirstack (cons old-wd shell-dirstack)))
(shell-dirstack-message))))))
(defun shell-extract-num (str)
(and (string-match "^\\+[1-9][0-9]*$" str)
(string-to-number str)))
(defvaralias 'shell-dirtrack-mode 'shell-dirtrackp)
(define-minor-mode shell-dirtrack-mode
"Turn directory tracking on and off in a shell buffer."
nil nil nil
(setq list-buffers-directory (if shell-dirtrack-mode default-directory))
(if shell-dirtrack-mode
(add-hook 'comint-input-filter-functions 'shell-directory-tracker nil t)
(remove-hook 'comint-input-filter-functions 'shell-directory-tracker t)))
(defalias 'shell-dirtrack-toggle 'shell-dirtrack-mode) (defalias 'dirtrack-toggle 'shell-dirtrack-mode)
(defalias 'dirtrack-mode 'shell-dirtrack-mode)
(defun shell-cd (dir)
"Do normal `cd' to DIR, and set `list-buffers-directory'."
(cd dir)
(if shell-dirtrackp
(setq list-buffers-directory default-directory)))
(defun shell-resync-dirs ()
"Resync the buffer's idea of the current directory stack.
This command queries the shell with the command bound to
`shell-dirstack-query' (default \"dirs\"), reads the next
line output and parses it to form the new directory stack.
DON'T issue this command unless the buffer is at a shell prompt.
Also, note that if some other subprocess decides to do output
immediately after the query, its output will be taken as the
new directory stack -- you lose. If this happens, just do the
command again."
(interactive)
(let* ((proc (get-buffer-process (current-buffer)))
(pmark (process-mark proc)))
(goto-char pmark)
(unless comint-process-echoes
(insert shell-dirstack-query) (insert "\n"))
(sit-for 0) (comint-send-string proc shell-dirstack-query)
(comint-send-string proc "\n")
(set-marker pmark (point))
(let ((pt (point))
(regexp
(concat
(if comint-process-echoes
(concat "\\(" (regexp-quote shell-dirstack-query) "\n\\)")
"\\(\\)")
"\\(.+\n\\)")))
(insert "\n") (backward-char 1)
(while (not (looking-at regexp))
(accept-process-output proc)
(goto-char pt)))
(goto-char pmark) (delete-char 1) (let* ((dl (buffer-substring (match-beginning 2) (1- (match-end 2))))
(dl-len (length dl))
(ds '()) (i 0))
(while (< i dl-len)
(string-match "\\s *\\(\\S +\\)\\s *" dl i) (setq ds (cons (concat comint-file-name-prefix
(substring dl (match-beginning 1)
(match-end 1)))
ds))
(setq i (match-end 0)))
(let ((ds (nreverse ds)))
(condition-case nil
(progn (shell-cd (car ds))
(setq shell-dirstack (cdr ds)
shell-last-dir (car shell-dirstack))
(shell-dirstack-message))
(error (message "Couldn't cd")))))))
(defalias 'dirs 'shell-resync-dirs)
(defun shell-dirstack-message ()
(when shell-dirtrack-verbose
(let* ((msg "")
(ds (cons default-directory shell-dirstack))
(home (expand-file-name (concat comint-file-name-prefix "~/")))
(homelen (length home)))
(while ds
(let ((dir (car ds)))
(and (>= (length dir) homelen)
(string= home (substring dir 0 homelen))
(setq dir (concat "~/" (substring dir homelen))))
(and comint-file-name-prefix
(>= (length dir) (length comint-file-name-prefix))
(string= comint-file-name-prefix
(substring dir 0 (length comint-file-name-prefix)))
(setq dir (substring dir (length comint-file-name-prefix)))
(setcar ds dir))
(setq msg (concat msg (directory-file-name dir) " "))
(setq ds (cdr ds))))
(message "%s" msg))))
(defun shell-snarf-envar (var)
"Return as a string the shell's value of environment variable VAR."
(let* ((cmd (format "printenv '%s'\n" var))
(proc (get-buffer-process (current-buffer)))
(pmark (process-mark proc)))
(goto-char pmark)
(insert cmd)
(sit-for 0) (comint-send-string proc cmd)
(set-marker pmark (point))
(let ((pt (point))) (insert "\n") (backward-char 1)
(while (not (looking-at ".+\n"))
(accept-process-output proc)
(goto-char pt)))
(goto-char pmark) (delete-char 1) (buffer-substring (match-beginning 0) (1- (match-end 0)))))
(defun shell-copy-environment-variable (variable)
"Copy the environment variable VARIABLE from the subshell to Emacs.
This command reads the value of the specified environment variable
in the shell, and sets the same environment variable in Emacs
\(what `getenv' in Emacs would return) to that value.
That value will affect any new subprocesses that you subsequently start
from Emacs."
(interactive (list (read-envvar-name "\
Copy Shell environment variable to Emacs: ")))
(setenv variable (shell-snarf-envar variable)))
(defun shell-forward-command (&optional arg)
"Move forward across ARG shell command(s). Does not cross lines.
See `shell-command-regexp'."
(interactive "p")
(let ((limit (save-excursion (end-of-line nil) (point))))
(if (re-search-forward (concat shell-command-regexp "\\([;&|][\t ]*\\)+")
limit 'move arg)
(skip-syntax-backward " "))))
(defun shell-backward-command (&optional arg)
"Move backward across ARG shell command(s). Does not cross lines.
See `shell-command-regexp'."
(interactive "p")
(let ((limit (save-excursion (comint-bol nil) (point))))
(when (> limit (point))
(setq limit (line-beginning-position)))
(skip-syntax-backward " " limit)
(if (re-search-backward
(format "[;&|]+[\t ]*\\(%s\\)" shell-command-regexp) limit 'move arg)
(progn (goto-char (match-beginning 1))
(skip-chars-forward ";&|")))))
(defun shell-dynamic-complete-command ()
"Dynamically complete the command at point.
This function is similar to `comint-dynamic-complete-filename', except that it
searches `exec-path' (minus the trailing Emacs library path) for completion
candidates. Note that this may not be the same as the shell's idea of the
path.
Completion is dependent on the value of `shell-completion-execonly', plus
those that effect file completion. See `shell-dynamic-complete-as-command'.
Returns t if successful."
(interactive)
(let ((filename (comint-match-partial-filename)))
(if (and filename
(save-match-data (not (string-match "[~/]" filename)))
(eq (match-beginning 0)
(save-excursion (shell-backward-command 1) (point))))
(prog2 (message "Completing command name...")
(shell-dynamic-complete-as-command)))))
(defun shell-dynamic-complete-as-command ()
"Dynamically complete at point as a command.
See `shell-dynamic-complete-filename'. Returns t if successful."
(let* ((filename (or (comint-match-partial-filename) ""))
(filenondir (file-name-nondirectory filename))
(path-dirs (cdr (reverse exec-path)))
(cwd (file-name-as-directory (expand-file-name default-directory)))
(ignored-extensions
(and comint-completion-fignore
(mapconcat (function (lambda (x) (concat (regexp-quote x) "$")))
comint-completion-fignore "\\|")))
(dir "") (comps-in-dir ())
(file "") (abs-file-name "") (completions ()))
(while path-dirs
(setq dir (file-name-as-directory (comint-directory (or (car path-dirs) ".")))
comps-in-dir (and (file-accessible-directory-p dir)
(file-name-all-completions filenondir dir)))
(while comps-in-dir
(setq file (car comps-in-dir)
abs-file-name (concat dir file))
(if (and (not (member file completions))
(not (and ignored-extensions
(string-match ignored-extensions file)))
(or (string-equal dir cwd)
(not (file-directory-p abs-file-name)))
(or (null shell-completion-execonly)
(file-executable-p abs-file-name)))
(setq completions (cons file completions)))
(setq comps-in-dir (cdr comps-in-dir)))
(setq path-dirs (cdr path-dirs)))
(let ((success (let ((comint-completion-addsuffix nil))
(comint-dynamic-simple-complete filenondir completions))))
(if (and (memq success '(sole shortest)) comint-completion-addsuffix
(not (file-directory-p (comint-match-partial-filename))))
(insert " "))
success)))
(defun shell-match-partial-variable ()
"Return the shell variable at point, or nil if none is found."
(save-excursion
(let ((limit (point)))
(if (re-search-backward "[^A-Za-z0-9_{}]" nil 'move)
(or (looking-at "\\$") (forward-char 1)))
(if (or (eolp) (looking-at "[^A-Za-z0-9_{}$]"))
nil
(re-search-forward "\\$?{?[A-Za-z0-9_]*}?" limit)
(buffer-substring (match-beginning 0) (match-end 0))))))
(defun shell-dynamic-complete-environment-variable ()
"Dynamically complete the environment variable at point.
Completes if after a variable, i.e., if it starts with a \"$\".
See `shell-dynamic-complete-as-environment-variable'.
This function is similar to `comint-dynamic-complete-filename', except that it
searches `process-environment' for completion candidates. Note that this may
not be the same as the interpreter's idea of variable names. The main problem
with this type of completion is that `process-environment' is the environment
which Emacs started with. Emacs does not track changes to the environment made
by the interpreter. Perhaps it would be more accurate if this function was
called `shell-dynamic-complete-process-environment-variable'.
Returns non-nil if successful."
(interactive)
(let ((variable (shell-match-partial-variable)))
(if (and variable (string-match "^\\$" variable))
(prog2 (message "Completing variable name...")
(shell-dynamic-complete-as-environment-variable)))))
(defun shell-dynamic-complete-as-environment-variable ()
"Dynamically complete at point as an environment variable.
Used by `shell-dynamic-complete-environment-variable'.
Uses `comint-dynamic-simple-complete'."
(let* ((var (or (shell-match-partial-variable) ""))
(variable (substring var (or (string-match "[^$({]\\|$" var) 0)))
(variables (mapcar (function (lambda (x)
(substring x 0 (string-match "=" x))))
process-environment))
(addsuffix comint-completion-addsuffix)
(comint-completion-addsuffix nil)
(success (comint-dynamic-simple-complete variable variables)))
(if (memq success '(sole shortest))
(let* ((var (shell-match-partial-variable))
(variable (substring var (string-match "[^$({]" var)))
(protection (cond ((string-match "{" var) "}")
((string-match "(" var) ")")
(t "")))
(suffix (cond ((null addsuffix) "")
((file-directory-p
(comint-directory (getenv variable))) "/")
(t " "))))
(insert protection suffix)))
success))
(defun shell-replace-by-expanded-directory ()
"Expand directory stack reference before point.
Directory stack references are of the form \"=digit\" or \"=-\".
See `default-directory' and `shell-dirstack'.
Returns t if successful."
(interactive)
(if (comint-match-partial-filename)
(save-excursion
(goto-char (match-beginning 0))
(let ((stack (cons default-directory shell-dirstack))
(index (cond ((looking-at "=-/?")
(length shell-dirstack))
((looking-at "=\\([0-9]+\\)/?")
(string-to-number
(buffer-substring
(match-beginning 1) (match-end 1)))))))
(cond ((null index)
nil)
((>= index (length stack))
(error "Directory stack not that deep"))
(t
(replace-match (file-name-as-directory (nth index stack)) t t)
(message "Directory item: %d" index)
t))))))
(provide 'shell)