* runLaTeX: detect the existence of a pre-generated .bbl file and use

it.  Useful if you're supposed to stick a \balancecolumns in the
  middle of the file.

svn path=/nixpkgs/trunk/; revision=26522

pkgs/misc/tex/nix/default.nix

@@ -53,7 +53,7 @@ rec {
           # The type denotes the kind of dependency, which determines
           # what extensions we use to look for it.
           deps = import (pkgs.runCommand "latex-includes"
-            { src = key; }
+            { rootFile = baseNameOf (toString rootFile); src = key; }
             "${pkgs.perl}/bin/perl ${./find-includes.pl}");
 
           # Look for the dependencies of `key', trying various

pkgs/misc/tex/nix/find-includes.pl

@@ -45,6 +45,7 @@ while (<FILE>) {
             $bib =~ s/^\s+//; # remove leading / trailing whitespace
             $bib =~ s/\s+$//;
             addName "misc", "$bib.bib";
+            addName "misc", (basename($ENV{"rootFile"}, ".tex", ".ltx") . ".bbl");
         }
     } elsif (/\\includegraphics(\[.*\])?\{(.*)\}/) {
         my $fn2 = $2;

pkgs/misc/tex/nix/run-latex.sh

@@ -68,11 +68,15 @@ for auxFile in $(find . -name "*.aux"); do
     # Run bibtex to process all bibliographies.  There may be several
     # when we're using the multibib package.
     if grep -q '\\citation' $auxFile; then
-        echo "RUNNING BIBTEX ON $auxFile..."
         auxBase=$(basename $auxFile .aux)
-        bibtex --terse $auxBase
-        cp $auxBase.bbl $out
-        runNeeded=1
+        if [ -e $auxBase.bbl ]; then
+            echo "SKIPPING BIBTEX ON $auxFile!"
+        else
+            echo "RUNNING BIBTEX ON $auxFile..."
+            bibtex --terse $auxBase
+            cp $auxBase.bbl $out
+            runNeeded=1
+        fi
         echo
     fi