Added -V/--variable option to set custom template variables.

git-svn-id: https://pandoc.googlecode.com/svn/trunk@1685 788f1e2b-df1e-0410-8736-df70ead52e1b

README

@@ -289,6 +289,13 @@ For further documentation, see the `pandoc(1)` man page.
     template appropriate for the output format will be used. See also
     `-D/--print-default-template`.
 
+`-V` *key=val*, `--variable=`*key:val*
+:   sets the template variable *key* to the value *val* when rendering the
+    document in standalone mode. This is only useful when the
+    `--template` option is used to specify a custom template, since
+    pandoc automatically sets the variables used in the default
+    templates.
+
 `-c` or `--css` *filename*
 :   allows the user to specify a custom stylesheet that will be linked to
     in HTML and S5 output.  This option can be used repeatedly to include
@@ -489,9 +496,9 @@ depending on the output format, but include:
 `css`
 :   links to CSS files, as specified using `-c/--css`
 
-Variables may be set at the command line using the
+Variables may be set at the command line using the `-V/--variable`
-`--set` option.  This allows users to include custom variables in
+option. This allows users to include custom variables in their
-their templates.
+templates.
 
 Templates may contain conditionals.  The syntax is as follows:
 

man/man1/markdown2pdf.1.md

@@ -54,6 +54,13 @@ The following options are most relevant:
     `-s`. See the section TEMPLATES in `pandoc`(1) for information about
     template syntax.
 
+-V KEY=VAL, \--variable=*KEY:VAL*
+:   Set the template variable KEY to the value VAL when rendering the
+    document in standalone mode. This is only useful when the
+    `--template` option is used to specify a custom template, since
+    pandoc automatically sets the variables used in the default
+    templates.
+
 -H *FILE*, \--include-in-header=*FILE*
 :   Include (LaTeX) contents of *FILE* at the end of the header.  Implies
     `-s`.

man/man1/pandoc.1.md

@@ -175,6 +175,13 @@ to Pandoc.  Or use `html2markdown`(1), a wrapper around `pandoc`.
     this option is not used, a default template appropriate for the
     output format will be used. See also `-D/--print-default-template`.
 
+-V KEY=VAL, \--variable=*KEY:VAL*
+:   Set the template variable KEY to the value VAL when rendering the
+    document in standalone mode. This is only useful when the
+    `--template` option is used to specify a custom template, since
+    pandoc automatically sets the variables used in the default
+    templates.
+
 -c *CSS*, \--css=*CSS*
 :   Link to a CSS style sheet.  *CSS* is the pathname of the style sheet.
 
@@ -270,9 +277,9 @@ depending on the output format, but include:
 `css`
 :   links to CSS files, as specified using `-c/--css`
 
-Variables may be set at the command line using the
+Variables may be set at the command line using the `-V/--variable`
-`--set` option.  This allows users to include custom variables in
+option. This allows users to include custom variables in their
-their templates.
+templates.
 
 Templates may contain conditionals.  The syntax is as follows:
 

src/markdown2pdf.hs

@@ -152,13 +152,14 @@ main = bracket
     unless (null miss) $ exit $! "Could not find " ++ intercalate ", " miss
     args <- getArgs
     -- check for invalid arguments and print help message if needed
-    let goodopts = ["-f","-r","-N", "-p","-R","-H","-B","-A", "-C","-o"]
+    let goodopts = ["-f","-r","-N", "-p","-R","-H","-B","-A", "-C","-o","-V"]
     let goodoptslong = ["--from","--read","--strict",
                    "--preserve-tabs","--tab-stop","--parse-raw",
                    "--toc","--table-of-contents",
                    "--number-sections","--include-in-header",
                    "--include-before-body","--include-after-body",
-                   "--custom-header","--output"]
+                   "--custom-header","--output",
+                   "--template", "--variable"]
     let isOpt ('-':_) = True
         isOpt _       = False
     let opts = filter isOpt args

src/pandoc.hs

@@ -339,6 +339,19 @@ options =
                   "FILENAME")
                  "" -- "Use custom template"
 
+    , Option "V" ["variable"]
+                 (ReqArg
+                  (\arg opt ->
+                     case break (`elem` ":=") arg of
+                          (k,_:v) -> do
+                            let newvars = (k, v) : optVariables opt
+                            return opt{ optVariables = newvars }
+                          _  -> do
+                            hPutStrLn stderr $ "Could not parse `" ++ arg ++ "' as a key/value pair (k=v or k:v)"
+                            exitWith $ ExitFailure 17)
+                  "FILENAME")
+                 "" -- "Use custom template"
+
     , Option "c" ["css"]
                  (ReqArg
                   (\arg opt -> do