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Buyer: xiujuan lu (luxiujuan@gmail.com) Transaction ID: 85W16630AD8515549 Vim <strong>101</strong> Hacks www.thegeekstuff.com Hack 42. Add Automatic Headers to Files Using Let us review how to use the powerful autocmd feature of Vim to create a header section inside a file (for example, header in a C programming code) with file name, creation date, last modified date/time automatically populated when you open a file in vi. Vim autocmd syntax: autocmd {event} {pattern} {cmd} Events: There are more than 40 autocmd events. The following are few sample autocmd events. Event BufNewFile FileReadPre Description Starting to edit a file that doesn't exist Before reading a file with a ":read" command BufWritePre Starting to write the whole buffer to a file FileWritePre Starting to write part of a buffer to a file BufDelete Before deleting a buffer from the buffer list BufWipeout Before completely deleting a buffer BufNew Just after creating a new buffer BufEnter After entering a buffer BufLeave Before leaving to another buffer 76
Buyer: xiujuan lu (luxiujuan@gmail.com) Transaction ID: 85W16630AD8515549 Vim <strong>101</strong> Hacks www.thegeekstuff.com SwapExists Detected an existing swap file Many developers want some default header for their programs. For example, when opening a “.c” file, you typically need a file header with a number of items. The following template is loaded automatically whenever I open a new “.c” file. You can achieve this in three steps as mentioned below. /* -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-. * File Name : 1.c * Purpose : * Creation Date : 22-12-2008 * Last Modified : Mon 22 Dec 2008 10:36:49 PM PST * Created By : _._._._._._._._._._._._._._._._._._._._._.*/ Step 1: Create a template file Save the above template in a text file with “:insert” in the first line, followed by the template and a “.”(dot) in the last line as shown below. $ cat c_header.txt :insert /* -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-. * File Name : * Purpose : * Creation Date : 77
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