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authorBlendoit <blendoit@gmail.com>2020-08-01 15:24:03 -0700
committerBlendoit <blendoit@gmail.com>2020-08-01 15:24:03 -0700
commite47650852b8aa4da6d0b0cea3b5421955795cc64 (patch)
tree2535f7cc4fa4b5c25bbd46f9523da5944b76e201 /elpa/ledger-mode-20200530.1710/ledger-exec.el
parent374ae3de24187512adddf01a56e5eb52c79db65f (diff)
Definitely /not/ including elpa/, that would be chaos.
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-;;; ledger-exec.el --- Helper code for use with the "ledger" command-line tool -*- lexical-binding: t; -*-
-
-;; Copyright (C) 2003-2016 John Wiegley (johnw AT gnu DOT org)
-
-;; This file is not part of GNU Emacs.
-
-;; This is free software; you can redistribute it and/or modify it under
-;; the terms of the GNU General Public License as published by the Free
-;; Software Foundation; either version 2, or (at your option) any later
-;; version.
-;;
-;; This is distributed in the hope that it will be useful, but WITHOUT
-;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-;; for more details.
-;;
-;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
-;; MA 02110-1301 USA.
-
-
-;;; Commentary:
-;; Code for executing ledger synchronously.
-
-;;; Code:
-
-(declare-function ledger-master-file "ledger-report" ())
-
-(defconst ledger-version-needed "3.0.0"
- "The version of ledger executable needed for interactive features.")
-
-(defvar ledger-works nil
- "Flag showing whether the ledger binary can support `ledger-mode' interactive features.")
-
-(defgroup ledger-exec nil
- "Interface to the Ledger command-line accounting program."
- :group 'ledger)
-
-(defcustom ledger-mode-should-check-version t
- "Should Ledger-mode verify that the executable is working?"
- :type 'boolean
- :group 'ledger-exec)
-
-(defcustom ledger-binary-path "ledger"
- "Path to the ledger executable."
- :type 'file
- :risky t
- :group 'ledger-exec)
-
-(defun ledger-exec-handle-error (ledger-errfile)
- "Deal with ledger errors contained in LEDGER-ERRFILE."
- (with-current-buffer (get-buffer-create "*Ledger Error*")
- (let ((buffer-read-only nil))
- (delete-region (point-min) (point-max))
- (insert-file-contents ledger-errfile))
- (view-mode)
- (setq buffer-read-only t)
- (current-buffer)))
-
-(defun ledger-exec-success-p (exit-code ledger-output-buffer)
- "Return t if EXIT-CODE is non-zero and output in LEDGER-OUTPUT-BUFFER is successful."
- (with-current-buffer ledger-output-buffer
- (goto-char (point-min))
- (if (or (not (zerop exit-code))
- (and (> (buffer-size) 1) (looking-at (regexp-quote "While"))))
- nil ;; failure, there is an error starting with "While"
- ledger-output-buffer)))
-
-(defun ledger-exec-ledger (input-buffer &optional output-buffer &rest args)
- "Run Ledger using INPUT-BUFFER.
-Optionally capture output in OUTPUT-BUFFER, and pass ARGS on the
-command line. Returns OUTPUT-BUFFER if ledger succeeded,
-otherwise the error output is displayed and an error is raised."
- (unless (and ledger-binary-path
- (or (and (file-exists-p ledger-binary-path)
- (file-executable-p ledger-binary-path))
- (executable-find ledger-binary-path)))
- (error "`ledger-binary-path' (value: %s) is not executable" ledger-binary-path))
- (let ((buf (or input-buffer (find-file-noselect (ledger-master-file))))
- (outbuf (or output-buffer
- (generate-new-buffer " *ledger-tmp*")))
- (errfile (make-temp-file "ledger-errors")))
- (unwind-protect
- (with-current-buffer buf
- (let ((exit-code
- (let ((coding-system-for-write 'utf-8)
- (coding-system-for-read 'utf-8))
- (apply #'call-process-region
- (append (list (point-min) (point-max)
- ledger-binary-path nil (list outbuf errfile) nil "-f" "-")
- args)))))
- (if (ledger-exec-success-p exit-code outbuf)
- outbuf
- (display-buffer (ledger-exec-handle-error errfile))
- (error "Ledger execution failed"))))
- (delete-file errfile))))
-
-(defun ledger-version-greater-p (needed)
- "Verify the ledger binary is usable for `ledger-mode' (version greater than NEEDED)."
- (let ((version-strings '()))
- (with-temp-buffer
- (when (ledger-exec-ledger (current-buffer) (current-buffer) "--version")
- (goto-char (point-min))
- (delete-horizontal-space)
- (setq version-strings (split-string
- (buffer-substring-no-properties (point)
- (point-max))))
- (if (and (string-match (regexp-quote "Ledger") (car version-strings))
- (or (string= needed (cadr version-strings))
- (string< needed (cadr version-strings))))
- t ;; success
- nil))))) ;;failure
-
-(defun ledger-check-version ()
- "Verify that ledger works and is modern enough."
- (interactive)
- (if ledger-mode-should-check-version
- (if (setq ledger-works (ledger-version-greater-p ledger-version-needed))
- (message "Good Ledger Version")
- (message "Bad Ledger Version"))))
-
-(provide 'ledger-exec)
-
-;;; ledger-exec.el ends here
Copyright 2019--2024 Marius PETER