Add documentation

.gitignore

@@ -0,0 +1 @@
+tags

README.md

@@ -1,3 +1,14 @@
-# logrotate vim plugin
+# vim-logrotate
 
-Syntax and help for logrotate config files
+Syntax and help for logrotate config files in /etc/logrotate.d/*
+
+# Install
+
+    mkdir -p ~/.vim/pack/gitpacks/start/
+    git clone https://github.com/balki/vim-logrotate
+    vim +":helptags ALL" +"qa"
+
+# Requirements
+
+1. Vim installation that includes patch-8.2.4770. (Works in Ubuntu 22.10)
+2. [gawk](https://www.gnu.org/software/gawk/manual/gawk.html) installed. See `g:logrotate_awk` config option to use a different awk

doc/vim-logrotate.txt

@@ -0,0 +1,52 @@
+*vim-logrotate.txt*	Syntax and help plugin for logrotate files
+*vim-logrotate*
+
+==============================================================================
+
+CONTENTS                                              *vim-logrotate-contents*
+
+    Features                             |vim-logrotate-features|
+    LogRotateHelp                        |:LogRotateHelp|
+    g:logrotate_awk                      |g:logrotate_awk|
+
+
+==============================================================================
+
+Features                                              *vim-logrotate-features*
+
+1. Detect and enable syntax-highlighting for logrotate files
+2. Sets 'omnifunc' to complete logrotate directives
+3. Sets 'keywordprg' to show help for logrotate directives
+
+
+:LogRotateHelp {directive}                                    *:LogRotateHelp*
+
+Shows the help for the directive in a popup window at cursor. Help text is
+extracted from the logrotate manual page (man logrotate).
+
+`:LogRotateHelp` is only enabled if
+
+1. Vim installation includes patch-8.2.4770
+2. An "awk" command is available that supports ranges in regular expression.
+(like "\d{1,4}"). Set |g:logrotate_awk| to use a different awk command.
+
+'keywordprg' is set so |K| works on directives. A different mapping can be set
+as shown below >
+  nmap <silent><leader>k :exe ':LogRotateHelp ' .. expand("<cword>")<CR>
+<
+
+
+g:logrotate_awk                                              *g:logrotate_awk*
+    Type: |String|
+    Default: "gawk"
+
+    Set a different awk command to parse man page.
+    E.g. "goawk" (https://github.com/benhoyt/goawk) 
+
+    Set to "disable" to disable help feature
+
+    Example: >
+        let g:logrotate_awk = "goawk"
+<
+
+ vim: ft=help tw=78 et ts=2 sw=2 sts=2 norl

ftplugin/logrotate.vim

@@ -18,10 +18,10 @@ else
     awkcmd = "gawk"
 endif
 
-if awkcmd != "disable" && executable(awkcmd)
+if has("patch-8.2.4770") && awkcmd != "disable" && executable(awkcmd)
 
-    command -nargs=1 LogRotateHelpCmd :call g:logrotate#LogrotateHelp(awkcmd, <f-args>)
-    setlocal keywordprg=:LogRotateHelpCmd
+    command -nargs=1 LogRotateHelp :call g:logrotate#LogrotateHelp(awkcmd, <f-args>)
+    setlocal keywordprg=:LogRotateHelp
     b:undo_ftplugin = b:undo_ftplugin .. " keywordprg<"
 endif