First version.

.gitignore

+/node_modules/
+/dist/*

Gruntfile.js

+const { readdirSync } = require("fs");
+
+module.exports = grunt => {
+  const host = "127.0.0.1";
+  const liveReloadPort = 8899;
+
+  const revealJsSources = ["js/**/*.js", "css/**/*.css", "lib/**", "plugin/**"];
+
+  grunt.initConfig({
+    pkg: grunt.file.readJSON("package.json"),
+
+    "http-server": {
+      dev: {
+        host,
+        root: "dist",
+        runInBackground: true,
+        openBrowser: true
+      }
+    },
+
+    watcher: {
+      configFiles: {
+        files: ["Gruntfile.js"]
+      },
+      presentations: {
+        files: "src/**/*.md",
+        tasks: [],
+        options: {
+          debounceDelay: 1000,
+          event: ["add", "change"],
+          spawn: false,
+          livereload: liveReloadPort
+        }
+      },
+      revealjs: {
+        files: revealJsSources,
+        task: ["build:revealjs"],
+        options: {
+          cwd: "node_modules/reveal.js/."
+        }
+      }
+    },
+
+    exec: {
+      build: {
+        cmd: (pres, env) =>
+          [
+            "pandoc",
+            "--from=markdown+smart",
+            `../src/${pres}.md`,
+            "--to=revealjs",
+            `--output=./${pres}${env !== "prod" ? "-" + env : ""}.html`,
+            "--standalone",
+            "--toc",
+            "--slide-level=2",
+            "--variable=theme:irstea",
+            "--variable=history:true",
+            env === "dev" &&
+              `--variable=header-includes='<script src="//${host}:${liveReloadPort}/livereload.js"></script>'`
+          ]
+            .filter(v => !!v)
+            .join(" "),
+        cwd: "dist",
+        stdout: true,
+        stderr: true
+      }
+    },
+
+    copy: {
+      revealjs: {
+        expand: true,
+        cwd: "node_modules/reveal.js/.",
+        src: revealJsSources,
+        dest: "dist/reveal.js/"
+      }
+    },
+
+    clean: ["dist/**"]
+  });
+
+  grunt.loadNpmTasks("grunt-contrib-clean");
+  grunt.loadNpmTasks("grunt-contrib-copy");
+  grunt.loadNpmTasks("grunt-exec");
+  grunt.loadNpmTasks("grunt-http-server");
+  grunt.loadNpmTasks("grunt-watcher");
+
+  grunt.registerTask("default", ["build"]);
+  grunt.registerTask("serve", ["http-server", "build:dev", "watcher"]);
+
+  grunt.registerTask("build:revealjs", ["copy:revealjs"]);
+
+  grunt.registerTask("build", env =>
+    grunt.task.run(["build:revealjs", `build:pres:${env || "prod"}`])
+  );
+
+  const enqueueBuilds = (paths, env) =>
+    grunt.task.run(
+      paths
+        .filter(name => name.endsWith(".md"))
+        .map(
+          name =>
+            `exec:build:${name.substr(0, name.length - 3)}:${env || "prod"}`
+        )
+    );
+
+  grunt.registerTask("build:pres", env =>
+    enqueueBuilds(readdirSync("src/"), env)
+  );
+
+  grunt.event.removeAllListeners("chokidar");
+  grunt.event.on("chokidar", function(_, filepath, target) {
+    if (target === "presentations") {
+      enqueueBuilds([filepath.substr(4)], "dev");
+    }
+  });
+};

reveal.js

+dist/reveal.js
\ No newline at end of file