Add grunt watch task for tex files

Gruntfile.js

@@ -144,13 +144,32 @@ module.exports = function(grunt) {
 			},
 			options: {
 				livereload: true
+			},
+			// Fachschaft WIAI: Convert TeX to SVG once a file changes
+			tex: {
+				files: [
+					'sections/*/*/*.tex',
+					'!sections/*/*/tmp-pdfcrop*'
+				],
+				tasks: 'tex2svg',
+				options: { nospawn: true }
 			}
 		},
 
 		retire: {
 			js: [ 'js/reveal.js', 'lib/js/*.js', 'plugin/**/*.js' ],
 			node: [ '.' ]
-		}
+		},
+
+		// Fachschaft WIAI: Necessary for tex2svg
+
+		texFilepath: '',
+
+		shell: {
+			tex2svg: {
+				command: './tex2svg-single.sh <%= texFilepath %>'
+			},
+		},
 
 	});
 
@@ -166,6 +185,9 @@ module.exports = function(grunt) {
 	grunt.loadNpmTasks( 'grunt-sass' );
 	grunt.loadNpmTasks( 'grunt-zip' );
 
+	// Fachschaft WIAI dependency:
+	grunt.loadNpmTasks( 'grunt-shell' );
+
 	// Default task
 	grunt.registerTask( 'default', [ 'css', 'js' ] );
 
@@ -190,4 +212,17 @@ module.exports = function(grunt) {
 	// Run tests
 	grunt.registerTask( 'test', [ 'jshint', 'qunit' ] );
 
+	// Fachschaft WIAI Adaption
+	// ========================
+
+	grunt.event.on('watch', function (action, filepath) {
+		if (/.*\.tex$/.test(filepath)) {
+			grunt.config.set('texFilepath', grunt.config.escape(filepath));
+		}
+	});
+
+	grunt.registerTask( 'tex2svg', 'Convert TeX to SVG', function(a) {
+		grunt.task.run('shell:tex2svg');
+	});
+
 };

package.json

@@ -24,7 +24,7 @@
   },
   "devDependencies": {
     "express": "^4.16.2",
-    "grunt": "^1.0.1",
+    "grunt": "^1.0.4",
     "grunt-autoprefixer": "^3.0.4",
     "grunt-cli": "^1.2.0",
     "grunt-contrib-connect": "^1.0.2",
@@ -33,11 +33,12 @@
     "grunt-contrib-qunit": "^2.0.0",
     "grunt-contrib-uglify": "^3.3.0",
     "grunt-contrib-watch": "^1.0.0",
-    "grunt-sass": "^2.0.0",
     "grunt-retire": "^1.0.7",
+    "grunt-sass": "^2.0.0",
     "grunt-zip": "~0.17.1",
     "mustache": "^2.3.0",
-    "socket.io": "^1.7.3"
+    "socket.io": "^1.7.3",
+    "grunt-shell": "^3.0.1"
   },
   "license": "MIT"
 }

tex2svg-single.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+file=$1
+pushd $(dirname $file)
+base=$(basename ${file%.tex})
+pdflatex --shell-escape --halt-on-error $base
+pdflatex --shell-escape --halt-on-error $base
+pdfcrop $base.pdf
+pdf2svg $base.pdf $base-orig.svg
+pdf2svg $base-crop.pdf $base-crop.svg
+rm -f $base.aux $base.log $base.out $base.pdf $base-crop.pdf
+popd