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--- code_formatting_standards [2009/11/04 18:09] – dbw2
+++ code_formatting_standards [2011/11/28 11:03] – [GNU Emacs] add missing ) dyrcona
@@ Line 3: / Line 3: @@
 ===== General Conventions =====
 As a general rule, Evergreen contributions should follow these basic conventions.
-  * Code
+  * Indents - tabs vs. spaces
-    * Indents should be 4 spaces
+    * The general rule for all files needing indentation is 4 space indents, no literal tabs
-    * Lines should be kept at 80 characters or less if possible
+    * The following file types are **exceptions** to this rule
-    * Tokens should be separated by whitespace (i.e '$this = 1' not '$this=1')
+      - Code written in C
-    * Opening braces should be on the same line as the corresponding token and 'else' should be "cuddled" <code>
+      - Database schema/code files (.sql files)
+      - Makefiles
+      - Plain text files
+  * Tokens should be separated by whitespace (i.e '$this = 1' not '$this=1')
+  * Opening braces should be on the same line as the corresponding token and 'else' should be "cuddled" <code>
 if ($this) {
     that();
@@ Line 21: / Line 25: @@
     something()
 }</code>
-    * Control structures should be followed by spaces, function names should not (see 'if' vs 'that' above)
+  * Control structures should be followed by spaces, function names should not (see 'if' vs 'that' above)
-  * XML files
-    * FIXME (4 space indents as well?)
-  * Text files
-    * Basic text files may use actual tab characters as needed
 ===== Tool Specifics =====
@@ Line 35: / Line 35: @@
 set expandtab
 set backspace=indent,eol,start
-autocmd BufEnter ?akefile* set noet ts=4 sw=4  "use real tabs in Makefiles
+autocmd BufEnter ?akefile*,*txt,*out,*csv,*.c,*.h,*.sql set noet "use real tabs in Makefiles, text files, C code, and SQL files
-autocmd BufEnter *txt set noet ts=4 sw=4  "use real tabs in txt files
-autocmd BufEnter *out set noet ts=4 sw=4  "use real tabs in txt files
-autocmd BufEnter *csv set noet ts=4 sw=4  "use real tabs in txt files
 </code>
 In addition, the following VIM options have been recommended by a prominent Evergreen developer but are not actually format related :-) :<code>
@@ Line 55: / Line 52: @@
 let loaded_matchparen = 1
 </code>
+==== GNU Emacs ====
+Add the following lines to your .emacs file and your code will meet the above standards for Perl.
+<code>
+; Use cperl-mode by default
+(defalias 'perl-mode 'cperl-mode)
+; cperl-mode doesn't have an add-style command, so we create our
+; style in a defun.
+(defun evergreen-perl-style ()
+  "Set cperl-mode for Evergreen coding guidelines."
+  (setq cperl-indent-level  4
+	cperl-brace-offset 0
+	cperl-continued-brace-offset 0
+	cperl-label-offset -4
+	cperl-continued-statement-offset 4
+	cperl-close-paren-offset -4
+	cperl-indent-parens-as-block t
+	cperl-tab-always-indent t
+	cperl-merge-trailing-else t
+	cperl-left-aligned-indent-comments t
+	indent-tabs-mode nil))
+; cperl-mode hook
+(add-hook 'cperl-mode-hook
+	  (lambda ()
+	    (evergreen-perl-style)))
+</code>
+The above will use these style guidelines on all of your Perl sources. More advanced users might want to configure other styles for different projects and check buffer-file-name to switch styles on a per-buffer basis. You might also want to look into setting many of the cperl-electric-* variables or cperl-hairy. They add a lot of neat features for automatic code completion in Perl.
 ==== perltidy ====
-The following options are recommended for using perltidy to format your Perl code:
+The following options are recommended when using perltidy to format your Perl code:
   * -b : Backup and modify in place
   * -ce : Enable the "cuddled else" style
 Example: <code>perltidy -ce -b Object.pm</code> This will tidy Object.pm and move your original to Object.pm.bak.  Note that this **will** clobber an existing Object.pm.bak file!