How to open files in eshell with wildcards

Question

I am very used to typing in a shell something like:

emacsclient **/Threshold.java

Where Threshold.java is a file deeply nested in a directory and I just want to open it by name.

When I try the same thing in eshell, I get (ec is an alias for find-file):

ec **/Threshold.java
Wrong type argument: stringp, ("src/main/java/org/elasticsearch/shield/admin/Threshold.java")

How can I get this working in eshell?

Answer 1

(defun eshell/my-find-file (pattern)
  (mapc #'find-file (mapcar #'expand-file-name pattern)))

then use my-find-file **/Threshold.java from Eshell, if you also want my-find-file to support non-glob pattern (for example, my-find-file Threshold.java), try following:

(defun eshell/my-find-file (pattern)
  (if (stringp pattern)
      (find-file pattern)
    (mapc #'find-file (mapcar #'expand-file-name pattern))))

Answer 2

Try this:

mapcar #'find-file **/Threshold.java

This only works if **/Threshold.java expands to exactly one file. Otherwise, the second file will be opened through a relative path, but based on the directory of the first file instead of the directory where the command was executed.

Answer 3

I wrote this handy function:

(defun eshell/for-each (cmd &rest args)
    (let ((fn (intern cmd))
          (dir default-directory))
      (dolist (arg (eshell-flatten-list args))
        (let ((default-directory dir))
          (funcall fn arg)))))

Notice the directory handling. You can then call, for example, for-each find-file **/Threshold.java OtherFileToo.java.

To open files from eshell I use this: alias ff for-each find-file $*.