Do not use shell commands to extract version number

Avoid using 'head', 'sed' or other POSIX commands to extract the version number when Emacs can do it. This allows installing just 'mu', without the extra unix tools in a Windows environment.
2020-12-04 16:45:09 +01:00
parent 4eed85187f
commit 03d5640cee
1 changed files with 3 additions and 3 deletions
--- a/mu4e/mu4e-proc.el
+++ b/mu4e/mu4e-proc.el
@ -243,9 +243,9 @@ backslashes and double-quotes."
     "Cannot find mu, please set `mu4e-mu-binary' to the mu executable path"))

  ;; sanity-check 2
-  (let ((version (shell-command-to-string
-                  (format "%s --version | head -1 | sed 's/.*version //' | tr -d '\n'"
-                          mu4e-mu-binary))))
+  (let ((version (let ((s (shell-command-to-string (concat mu4e-mu-binary " --version"))))
+                   (and (string-match "version \\([.0-9]+\\)" s)
+                        (match-string 1 s)))))
    (unless (string= version mu4e-mu-version)
      (mu4e-error
       (concat