71 lines
2.5 KiB
Common Lisp
71 lines
2.5 KiB
Common Lisp
(in-package :cli)
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(declaim (optimize (safety 3)))
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;; TODO(sterni): nicer messages for various errors signaled?
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(defun partition-by (f seq)
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"Split SEQ into two lists, returned as multiple values. The first list
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contains all elements for which F returns T, the second one the remaining
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elements."
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(loop for x in seq
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if (funcall f x)
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collecting x into yes
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else
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collecting x into no
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finally (return (values yes no))))
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(defparameter +help+ '(("mnote-html" . "FILE [FILE [ ... ]]")
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("mblog" . "MAILDIR OUT")))
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(defun mnote-html (name flags &rest args)
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"Convert all note mime messages given as ARGS to HTML fragments."
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(declare (ignore name flags))
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(loop for arg in args
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do (note:apple-note-html-fragment
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(note:make-apple-note (mime:mime-message (pathname arg)))
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*standard-output*)))
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(defun mblog (name flags maildir outdir)
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"Read a MAILDIR and build an mblog in OUTDIR "
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(declare (ignore name flags))
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(build-mblog (pathname maildir) (pathname outdir)))
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(defun display-help (name flags &rest args)
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"Print help message for current executable."
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(declare (ignore args flags))
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(format *error-output* "Usage: ~A ~A~%"
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name
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(or (cdr (assoc name +help+ :test #'string=))
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(concatenate 'string "Unknown executable: " name))))
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(defun usage-error (name flags &rest args)
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"Print help and exit with a non-zero exit code."
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(format *error-output* "~A: usage error~%" name)
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(display-help name args flags)
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(uiop:quit 100))
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(defun main ()
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"Dispatch to correct main function based on arguments and UIOP:ARGV0."
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(multiple-value-bind (flags args)
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(partition-by (lambda (x) (starts-with #\- x))
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(uiop:command-line-arguments))
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(let ((prog-name (pathname-name (pathname (uiop:argv0))))
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(help-requested-p (find-if (lambda (x)
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(member x '("-h" "--help" "--usage")
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:test #'string=))
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args)))
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(apply
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(if help-requested-p
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#'display-help
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(cond
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((and (string= prog-name "mnote-html")
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(null flags))
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#'mnote-html)
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((and (string= prog-name "mblog")
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(null flags)
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(= 2 (length args)))
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#'mblog)
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(t #'usage-error)))
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(append (list prog-name flags)
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args)))))
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