327 lines
8.8 KiB
Scheme
327 lines
8.8 KiB
Scheme
(define (standard-command-plugin-completer command args)
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#f)
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;; helper functions for globbing
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(define (contains-glob-enumerator? arg)
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(if-match
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(regexp-search
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(rx (: (submatch (* any)) ("{[") (* any) (submatch (* any)) ("]}")))
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arg)
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(whole-arg submatch-before submatch-after)
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(not (or (string-suffix? "\\" submatch-before)
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(string-suffix? "\\" submatch-after)))
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#f))
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(define (contains-glob-wildcard? arg)
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(if-match
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(regexp-search (rx (: (submatch (* any)) ("*?"))) arg)
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(whole-arg submatch-before)
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(not (string-suffix? "\\" submatch-before))
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#f))
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(define (contains-glob-expression? arg)
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(or (contains-glob-wildcard? arg)
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(contains-glob-enumerator? arg)))
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(define (glob-argument arg)
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(let ((files (glob arg)))
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(if (null? files)
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(error "no files match this glob expression" arg (cwd))
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files)))
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;; expand command list:
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;; - substiute environment vars in strings with their values
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;; - globbing
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(define (env-var-name str)
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(cond
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((regexp-search
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(rx (: #\$ (? #\{) (submatch (+ (- ascii #\}))) (? #\}))) str)
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=> (lambda (matches)
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(match:substring matches 1)))
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(else #f)))
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(define (lookup-env-var var)
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(cond
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((assoc var (env->alist))
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=> cdr)
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(else
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(error "Undefined environment variable" var))))
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(define (substitute-env-vars str)
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(cond
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((env-var-name str)
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=> lookup-env-var)
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(else str)))
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(define (expand-string/s-expr v)
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(if (string? v)
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(substitute-env-vars v)
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v))
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(define (expand-redirection redirection)
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(make-redirection
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(redirection-op redirection)
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(expand-string/s-expr (redirection-dest redirection))))
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(define (expand-command command)
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(let ((expanded (map expand-string/s-expr (command-args command))))
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(make-command
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(expand-string/s-expr (command-executable command))
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(fold-right
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(lambda (arg args)
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(if (and (string? arg) (contains-glob-expression? arg))
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(append (glob-argument arg) args)
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(cons arg args)))
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'() expanded)
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(map expand-redirection (command-redirections command)))))
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(define (expand-command-line command-line)
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(make-command-line
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(expand-command (command-line-first-cmd command-line))
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(map (lambda (combinator.command)
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(cons (car combinator.command)
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(expand-command (cdr combinator.command))))
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(command-line-combinator/cmds command-line))
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(command-line-job-ctrl command-line)))
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;; #####
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;; it's a dumb idea to keep command and args separate, merge
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;; this stuff
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(define (standard-command-plugin-evaluater command args)
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(let* ((parsed
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(parse-command-line
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(lex-command-line
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(string-append command " "
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(string-join args)))))
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(expanded (expand-command-line parsed))
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(s-expr (compile-command-line expanded)))
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(debug-message "Compiled command " s-expr)
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(eval-s-expr s-expr)))
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(define standard-command-plugin
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(make-command-plugin #f
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standard-command-plugin-completer
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standard-command-plugin-evaluater))
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;; some common commands
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(define no-completer #f)
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(define just-run-in-foreground
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(lambda (command args)
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(run/fg* `(exec-epf (,command ,@args)))))
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(define just-run-in-background
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(lambda (command args)
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(run/bg* `(exec-epf (,command ,@args)))))
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;; Parse options for ls command using args-fold (SRFI 37)
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;; We don't care for options that format the output.
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(define defaults-ls-options
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'((long . #t)
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(dot-files? . #t)
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(sort-by-mtime . #f)
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(reverse-sort . #f)))
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(define (parse-ls-arguments args)
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(let* ((on/off-option-processor
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(lambda (name)
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(lambda (option arg-name arg ops)
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(cons (cons name #t) ops))))
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(long-option
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(option '(#\l) #f #f
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(on/off-option-processor 'long)))
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(dotfiles-option
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(option '(#\a) #f #f
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(on/off-option-processor 'dot-files?)))
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(sort-mtime-option
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(option '(#\t) #f #f
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(on/off-option-processor 'sort-by-mtime)))
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(reverse-sort-option
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(option '(#\r) #f #f
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(on/off-option-processor 'reverse-sort))))
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(let ((given-args
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(args-fold
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args
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(list long-option dotfiles-option
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sort-mtime-option reverse-sort-option)
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(lambda (option name args operands)
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(error "Unknown ls option" name))
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cons '())))
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(receive (options rest) (partition pair? given-args)
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(values
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(map (lambda (p)
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(or (assoc (car p) options) p))
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defaults-ls-options)
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rest)))))
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(register-plugin!
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(make-command-plugin
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"ls"
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no-completer
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(lambda (command args)
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(debug-message "running ls plugin" command args)
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(receive (options paths) (parse-ls-arguments args)
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(let* ((set? (lambda (opt) (cdr (assoc opt options))))
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(sort
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(if (set? 'sort-by-mtime)
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(lambda (lst)
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(list-sort
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(lambda (f g)
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(< (file-info:mtime (fs-object-info f))
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(file-info:mtime (fs-object-info g))))
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lst))
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(lambda (lst)
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(list-sort
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(lambda (f g)
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(string<? (fs-object-name f) (fs-object-name g)))
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lst))))
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(reverse
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(if (set? 'reverse-sort)
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reverse
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(lambda (l) l)))
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(paths (if (null? paths)
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(list (cwd))
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paths)))
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(reverse
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(sort
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(apply
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append
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(map (lambda (path)
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(if (file-directory? path)
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(directory-files path (set? 'dot-files?))
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(list (file-name->fs-object path))))
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paths)))))))))
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(register-plugin!
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(make-command-plugin "ps"
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no-completer
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(lambda (command args)
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(pps))))
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(register-plugin!
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(make-command-plugin "pwd"
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no-completer
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(lambda (command args)
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(cwd))))
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(register-plugin!
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(make-command-plugin
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"cd"
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(lambda (command to-complete)
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(debug-message "cd-completer")
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(complete-with-filesystem-objects
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(lambda (file)
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(call-with-current-continuation
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(lambda (esc)
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(with-handler
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(lambda (c more)
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(if (error? c)
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(esc #f)
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(more)))
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(lambda ()
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(and (file-directory? file)
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(file-name-as-directory file)))))))
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(or (to-complete-prefix to-complete) (cwd))))
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(lambda (command args)
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(chdir (resolve-file-name (if (null? args)
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"~"
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(car args))))
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(cwd))))
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(register-plugin!
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(make-command-plugin "setenv"
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no-completer
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(lambda (command args)
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(setenv (car args) (cadr args)))))
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(register-plugin!
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(make-command-plugin "getenv"
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no-completer
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(lambda (command args)
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(getenv (car args)))))
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(register-plugin!
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(make-command-plugin "printenv"
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no-completer
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(lambda (command args)
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(env->alist))))
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(register-plugin!
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(make-command-plugin "exit"
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no-completer
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(lambda (command args)
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(clear)
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(exit (if (null? args)
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0
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(string->number (car args)))))))
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(register-plugin!
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(make-command-plugin "jobs"
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(lambda (command prefix args arg-pos)
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'("running" "ready" "stopped" "output" "waiting-for-input"))
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(lambda (command args)
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(let ((selectors
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`(("running" . ,running-jobs)
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("ready" . ,ready-jobs)
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("stopped" . ,stopped-jobs)
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("output" . ,jobs-with-new-output)
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("input" . ,jobs-waiting-for-input))))
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(append-map
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(lambda (arg)
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(cond
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((assoc arg selectors)
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=> (lambda (p)
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((cdr p))))))
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(if (null? args)
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(map car selectors)
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(delete-duplicates args)))))))
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(register-plugin!
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(make-command-plugin
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"latex"
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(make-completer-for-file-with-extension '(".tex"))
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just-run-in-foreground))
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(register-plugin!
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(make-command-plugin
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"xdvi"
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(make-completer-for-file-with-extension '(".dvi"))
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just-run-in-background))
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(register-plugin!
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(make-command-plugin
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"ftp"
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(let* ((hosts '("ftp.gnu.org" "ftp.x.org"))
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(cs (make-completion-set hosts)))
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(lambda (command to-complete)
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(debug-message "ftp completer " command "," to-complete)
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(completions-for cs (or (to-complete-prefix to-complete) ""))))
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just-run-in-foreground))
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(define (make-debug-plugin val buffer)
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(lambda (message)
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(case message
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((paint)
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(lambda (self win buffer have-focus?)
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(let ((cols (+ 0 (result-buffer-num-cols buffer)))
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(lines (+ 0 (result-buffer-num-lines buffer))))
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(wmove win 0 0)
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(waddstr win "A")
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(wmove win 0 cols)
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(waddstr win "B")
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(wmove win lines cols)
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(waddstr win "C")
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(wmove win lines 0)
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(waddstr win "D")
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(wrefresh win))))
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(else
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(lambda (self . more)
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self)))))
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(register-plugin!
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(make-view-plugin make-debug-plugin (lambda (v) (eq? v 'debug))))
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