feat(PoC): PoC complete

- HTTP server - Rendering markdown content into a HTML template - theme and some other useful options configurable via config file or flag - release pipeline prepared - reveal.js statically included into binary - config hot reloading
2019-04-19 23:56:39 +02:00 · 2019-04-19 23:56:39 +02:00 · a4c0016baa
commit a4c0016baa
parent 99d76c122b
19 changed files with 866 additions and 91 deletions
--- a/.gitignore
+++ b/.gitignore
@ -10,3 +10,20 @@

 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
+
+# Jetbrainse
+.idea/
+
+# VSCode
+.vscode/
+.history
+
+assets/reveal
+
+# packr2 generated
+*-packr.go
+
+# binaries
+goveal
+
+!goveal/
--- a/.goreleaser.yml
+++ b/.goreleaser.yml
@ -0,0 +1,53 @@
+project_name: goveal
+before:
+  hooks:
+    - mkdir -p ./assets/reveal
+    - ./download_revealjs.sh
+    - go mod download
+    - go build -v ./...
+    - go get -u github.com/gobuffalo/packr/v2/packr2
+    - packr2
+builds:
+  - main: ./cmd/goveal/main.go
+    binary: goveal
+    goos:
+      - linux
+      - windows
+      - darwin
+    goarch:
+      - amd64
+      - arm
+      - arm64
+    ldflags:
+      - -w -s
+    env:
+      - CGO_ENABLED=0
+    ignore:
+      - goos: darwin
+        goarch: 386
+      - goos: linux
+        goarch: arm
+        goarm: 7
+archives:
+  - replacements:
+      darwin: Darwin
+      linux: Linux
+      windows: Windows
+      386: i386
+      amd64: x86_64
+    format_overrides:
+      - goos: windows
+        format: zip
+    files:
+      - LICENSE
+      - README.md
+checksum:
+  name_template: 'checksums.txt'
+snapshot:
+  name_template: "{{ .Tag }}-next"
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - '^docs:'
+      - '^test:'
--- a/119
+++ b/119
@ -0,0 +1,119 @@
+VERSION = $(shell git describe --dirty --tags --always)
+REPO = github.com/baez90/go-reveal-slides
+BUILD_PATH = $(REPO)/cmd/goveal
+PKGS = $(shell go list ./... | grep -v /vendor/)
+TEST_PKGS = $(shell find . -type f -name "*_test.go" -printf '%h\n' | sort -u)
+GOARGS = GOOS=linux GOARCH=amd64
+GO_BUILD_ARGS = -ldflags="-w -s"
+BINARY_NAME = goveal
+DIR = $(dir $(realpath $(firstword $(MAKEFILE_LIST))))
+DEBUG_PORT = 2345
+
+REVEALJS_VERSION = 3.8.0
+GORELEASER_VERSION = 0.106.0
+
+.PHONY: all clean clean-all clean-vendor rebuild format revive test deps compile run debug watch watch-test cloc docs serve-docs serve-godoc ensure-revive ensure-reflex ensure-delve ensure-godoc ensure-packr2 ensure-goreleaser
+
+export CGO_ENABLED:=0
+
+all: format compile
+
+clean-all: clean clean-vendor
+
+rebuild: clean format compile
+
+format:
+	@go fmt $(PKGS)
+
+revive: ensure-revive
+	@revive --config $(DIR)assets/lint/config.toml -exclude $(DIR)vendor/... -formatter friendly $(DIR)...
+
+clean: ensure-packr2
+	@rm -f debug $(BINARY_NAME)
+	@rm -rf dist
+	@packr2 clean
+
+clean-vendor:
+	rm -rf vendor/
+
+test:
+	@go test -coverprofile=./cov-raw.out -v $(TEST_PKGS)
+	@cat ./cov-raw.out | grep -v "generated" > ./cov.out
+
+cli-cover-report:
+	@go tool cover -func=cov.out
+
+html-cover-report:
+	@go tool cover -html=cov.out -o .coverage.html
+
+deps:
+	@go build -v ./...
+
+compile: deps ensure-packr2
+	@$(GOARGS) packr2 build $(GO_BUILD_ARGS) -o $(DIR)/$(BINARY_NAME) $(BUILD_PATH)
+
+run:
+	@go run $(BUILD_PATH)
+
+debug: ensure-delve
+	@dlv debug \
+		--headless \
+		--listen=127.10.10.2:$(DEBUG_PORT) \
+		--api-version=2 $(BUILD_PATH) \
+		--build-flags="-tags debug" \
+		-- serve --config ./examples/goveal.yaml $(DIR)/examples/slides.md
+
+download-reveal:
+	@mkdir -p $(DIR)/assets/reveal
+	@curl -sL https://github.com/hakimel/reveal.js/archive/$(REVEALJS_VERSION).tar.gz | tar -xvz --strip-components=1 -C $(DIR)/assets/reveal --wildcards "*.js" --wildcards "*.css" --exclude "test" --exclude "gruntfile.js"
+
+watch: ensure-reflex
+	@reflex -r '\.go$$' -s -- sh -c 'make debug'
+
+watch-test: ensure-reflex
+	@reflex -r '_test\.go$$' -s -- sh -c 'make test'
+
+cloc:
+	@cloc --vcs=git --exclude-dir=.idea,.vscode,.theia,public,docs, .
+
+serve-godoc: ensure-godoc
+	@godoc -http=:6060
+
+serve-docs: ensure-reflex docs
+	@reflex -r '\.md$$' -s -- sh -c 'mdbook serve -d $(DIR)/public -n 127.0.0.1 $(DIR)/docs'
+
+docs:
+	@mdbook build -d $(DIR)/public $(DIR)/docs`
+
+test-release: ensure-goreleaser ensure-packr2
+	@goreleaser --snapshot --skip-publish --rm-dist
+
+ensure-revive:
+ifeq (, $(shell which revive))
+	$(shell go get -u github.com/mgechev/revive)
+endif
+
+ensure-delve:
+ifeq (, $(shell which dlv))
+	$(shell go get -u github.com/go-delve/delve/cmd/dlv)
+endif
+
+ensure-reflex:
+ifeq (, $(shell which reflex))
+	$(shell go get -u github.com/cespare/reflex)
+endif
+
+ensure-godoc:
+ifeq (, $(shell which godoc))
+	$(shell go get -u golang.org/x/tools/cmd/godoc)
+endif
+
+ensure-packr2:
+ifeq (, $(shell which packr2))
+	$(shell go get -u github.com/gobuffalo/packr/v2/packr2)
+endif
+
+ensure-goreleaser:
+ifeq (, $(shell which goreleaser))
+	$(shell curl -sL https://github.com/goreleaser/goreleaser/releases/download/v$(GORELEASER_VERSION)/goreleaser_Linux_x86_64.tar.gz | tar -xvz --exclude "*.md" -C $$GOPATH/bin)
+endif
--- a/README.md
+++ b/README.md
@ -1 +1,35 @@
-# go-reveal-slides
+# Goveal
+
+Goveal is very small an very simple tool that reads Markdown from a given file, renders  it into a HTML template and serves it as local HTTP server.
+Right now Goveal uses Reveal.js 3.8.0 to create presentations and therefore also includes all features of Reveal.js 3.8.0.
+
+## Usage
+
+The easiest way to use `goveal` is to download a release, and run it from your `$PATH`.
+
+```bash
+goveal serve ./slides.md
+```
+
+| Param                    | Description                                   | Default value           |
+| ------------------------ | --------------------------------------------- | ----------------------- |
+| `--host`                 | Hostname the binary is listening on           | `localhost`             |
+| `--port`                 | Port the binary is listening on               | `2233`                  |
+| `--code-theme`           | highlight.js theme to use                     | `monokai`               |
+| `--config`               | Path to the config file see [config](#config) | `$HOME/goveal:./goveal` |
+| `-h` / `--help`          | shows help                                    |                         |
+| `--horizontal-separator` | horizontal separator to split slides          | `===`                   |
+| `--vertical-separator`   | vertical separator to split slides            | `---`                   |
+| `--theme`                | reveal.js theme to use                        | `white`                 |
+
+## Config
+
+Goveal supports multiple configuration mechanisms.
+It tries to load a configuration file from `$HOME` or from `.` i.e. `$HOME/goveal.yaml` or `$HOME/goveal.yml` or `./goveal.yaml` and so on.
+
+Most options that can be set via commandline flags can also be set via configuration file (actually all but the `--config` switch does not make sense in the configuration file, does it? :wink:).
+It is more a convenience feature to be able to set a theme and so on and so forth for the presentation without having to pass it every time as parameter.
+
+Furthermore goveal supports configuration hot reloading i.e. you can play around with different themes and the rendered theme will be changed whenever you hit the save button!
+
+See also an example at [`./examples/goveal.yaml`](./examples/goveal.yaml).
--- a/assets/lint/config.toml
+++ b/assets/lint/config.toml
@ -0,0 +1,46 @@
+ignoreGeneratedHeader = false
+severity = "warning"
+confidence = 0.8
+errorCode = 1
+warningCode = 1
+empty-block = true
+confusing-naming = true
+get-return = true
+deep-exit = true
+unused-parameter = true
+unreachable-code = true
+
+
+[rule.blank-imports]
+[rule.context-as-argument]
+[rule.context-keys-type]
+[rule.dot-imports]
+[rule.error-return]
+[rule.error-strings]
+[rule.error-naming]
+[rule.exported]
+[rule.if-return]
+[rule.increment-decrement]
+[rule.var-naming]
+[rule.var-declaration]
+[rule.package-comments]
+[rule.range]
+[rule.receiver-naming]
+[rule.time-naming]
+[rule.unexported-return]
+[rule.indent-error-flow]
+[rule.errorf]
+[rule.empty-block]
+[rule.superfluous-else]
+[rule.unused-parameter]
+[rule.unreachable-code]
+[rule.redefines-builtin-id]
+
+[argument-limit]
+  arguments =[4]
+
+[line-length-limit]
+  arguments =[80]
+
+[rule.add-constant]
+  arguments = [{maxLitCount = "3",allowStrs ="\"\"",allowInts="0,1,2",allowFloats="0.0,0.,1.0,1.,2.0,2."}]
--- a/assets/template/reveal-markdown.tmpl
+++ b/assets/template/reveal-markdown.tmpl
@ -0,0 +1,52 @@
+<!doctype html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+
+    <title>goveal</title>
+
+    <link rel="stylesheet" href="/reveal/css/reveal.css">
+    <link rel="stylesheet" href="/reveal/css/theme/{{ .Reveal.Theme }}.css" id="theme">
+
+    <link rel="stylesheet" href="/reveal/lib/css/{{ .Reveal.CodeTheme }}.css">
+</head>
+
+<body>
+
+<div class="reveal">
+    <div class="slides">
+        <!-- Slides are separated by newline + three dashes + newline, vertical slides identical but two dashes -->
+        <section data-markdown data-separator="^\n{{ .Reveal.HorizontalSeparator }}\n"
+                 data-separator-vertical="^\n{{ .Reveal.VerticalSeparator }}\n">
+            <script type="text/template">
+                {{ .MarkdownBody }}
+            </script>
+        </section>
+    </div>
+</div>
+
+<script src="/reveal/js/reveal.js"></script>
+
+<script>
+
+			Reveal.initialize({
+				controls: true,
+				progress: true,
+				history: true,
+				center: true,
+
+				// Optional libraries used to extend on reveal.js
+				dependencies: [
+					{ src: '/reveal/plugin/markdown/marked.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
+                    { src: '/reveal/plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
+                    { src: '/reveal/plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } },
+					{ src: '/reveal/plugin/notes/notes.js' }
+				]
+			});
+
+
+</script>
+
+</body>
+</html>
--- a/cmd/goveal/main.go
+++ b/cmd/goveal/main.go
@ -14,7 +14,7 @@

 package main

-import "github.com/baez90/go-reveal-slides/cmd"
+import "github.com/baez90/go-reveal-slides/internal/app/cmd"

 func main() {
 	cmd.Execute()
--- a/cmd/root.go
+++ b/cmd/root.go
@ -1,89 +0,0 @@
-// Copyright © 2019 Peter Kurfer
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package cmd
-
-import (
-	"fmt"
-	"os"
-
-	homedir "github.com/mitchellh/go-homedir"
-	"github.com/spf13/cobra"
-	"github.com/spf13/viper"
-)
-
-var cfgFile string
-
-// rootCmd represents the base command when called without any subcommands
-var rootCmd = &cobra.Command{
-	Use:   "go-reveal-slides",
-	Short: "A brief description of your application",
-	Long: `A longer description that spans multiple lines and likely contains
-examples and usage of using your application. For example:
-
-Cobra is a CLI library for Go that empowers applications.
-This application is a tool to generate the needed files
-to quickly create a Cobra application.`,
-	// Uncomment the following line if your bare application
-	// has an action associated with it:
-	//	Run: func(cmd *cobra.Command, args []string) { },
-}
-
-// Execute adds all child commands to the root command and sets flags appropriately.
-// This is called by main.main(). It only needs to happen once to the rootCmd.
-func Execute() {
-	if err := rootCmd.Execute(); err != nil {
-		fmt.Println(err)
-		os.Exit(1)
-	}
-}
-
-func init() {
-	cobra.OnInitialize(initConfig)
-
-	// Here you will define your flags and configuration settings.
-	// Cobra supports persistent flags, which, if defined here,
-	// will be global for your application.
-	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.go-reveal-slides.yaml)")
-
-	// Cobra also supports local flags, which will only run
-	// when this action is called directly.
-	rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
-}
-
-// initConfig reads in config file and ENV variables if set.
-func initConfig() {
-	if cfgFile != "" {
-		// Use config file from the flag.
-		viper.SetConfigFile(cfgFile)
-	} else {
-		// Find home directory.
-		home, err := homedir.Dir()
-		if err != nil {
-			fmt.Println(err)
-			os.Exit(1)
-		}
-
-		// Search config in home directory with name ".go-reveal-slides" (without extension).
-		viper.AddConfigPath(home)
-		viper.SetConfigName(".go-reveal-slides")
-	}
-
-	viper.AutomaticEnv() // read in environment variables that match
-
-	// If a config file is found, read it in.
-	if err := viper.ReadInConfig(); err == nil {
-		fmt.Println("Using config file:", viper.ConfigFileUsed())
-	}
-}
--- a/download_revealjs.sh
+++ b/download_revealjs.sh
@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+mkdir -p ./assets/reveal
+curl -sL "https://github.com/hakimel/reveal.js/archive/${1:-3.8.0}.tar.gz" | tar -xvz --strip-components=1 -C ./assets/reveal --wildcards *.js --wildcards *.css --exclude test --exclude gruntfile.js
--- a/examples/gopher.jpg
+++ b/examples/gopher.jpg
--- a/examples/goveal.yaml
+++ b/examples/goveal.yaml
@ -0,0 +1,4 @@
+theme: night
+code-theme: monokai
+horizontal-separator: ===
+vertical-separator: ---
--- a/examples/slides.md
+++ b/examples/slides.md
@ -0,0 +1,45 @@
+# Markdown Demo
+
+## External 1.1
+
+Content 1.1
+
+asdf
+
+Note: This will only appear in the speaker notes window.
+
+---
+
+## External 1.2
+
+Content 1.2
+
+===
+
+## External 2
+
+Content 2.1
+
+===
+
+## External 3.1
+
+Content 3.1
+
+---
+
+## External 3.2
+
+Content 3.2
+
+---
+
+## External 3.3
+
+![External Image](https://s3.amazonaws.com/static.slid.es/logo/v2/slides-symbol-512x512.png)
+
+===
+
+## External 4.1
+
+![Local image](/local/examples/gopher.jpg)
--- a/go.mod
+++ b/go.mod
@ -0,0 +1,22 @@
+module github.com/baez90/go-reveal-slides
+
+go 1.12
+
+require (
+	github.com/fsnotify/fsnotify v1.4.7
+	github.com/gobuffalo/flect v0.1.3 // indirect
+	github.com/gobuffalo/packr/v2 v2.2.0
+	github.com/inconshreveable/mousetrap v1.0.0 // indirect
+	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
+	github.com/kr/pty v1.1.4 // indirect
+	github.com/mitchellh/go-homedir v1.1.0
+	github.com/sirupsen/logrus v1.4.1
+	github.com/spf13/cobra v0.0.3
+	github.com/spf13/pflag v1.0.3
+	github.com/spf13/viper v1.3.2
+	github.com/stretchr/objx v0.2.0 // indirect
+	golang.org/x/crypto v0.0.0-20190418165655-df01cb2cc480 // indirect
+	golang.org/x/net v0.0.0-20190419010253-1f3472d942ba // indirect
+	golang.org/x/sys v0.0.0-20190419153524-e8e3143a4f4a // indirect
+	golang.org/x/tools v0.0.0-20190419195823-c39e7748f6eb // indirect
+)
--- a/go.sum
+++ b/go.sum
@ -0,0 +1,123 @@
+github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
+github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
+github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/gobuffalo/attrs v0.0.0-20190224210810-a9411de4debd/go.mod h1:4duuawTqi2wkkpB4ePgWMaai6/Kc6WEz83bhFwpHzj0=
+github.com/gobuffalo/depgen v0.0.0-20190329151759-d478694a28d3/go.mod h1:3STtPUQYuzV0gBVOY3vy6CfMm/ljR4pABfrTeHNLHUY=
+github.com/gobuffalo/envy v1.6.15/go.mod h1:n7DRkBerg/aorDM8kbduw5dN3oXGswK5liaSCx4T5NI=
+github.com/gobuffalo/envy v1.7.0 h1:GlXgaiBkmrYMHco6t4j7SacKO4XUjvh5pwXh0f4uxXU=
+github.com/gobuffalo/envy v1.7.0/go.mod h1:n7DRkBerg/aorDM8kbduw5dN3oXGswK5liaSCx4T5NI=
+github.com/gobuffalo/flect v0.1.0/go.mod h1:d2ehjJqGOH/Kjqcoz+F7jHTBbmDb38yXA598Hb50EGs=
+github.com/gobuffalo/flect v0.1.1/go.mod h1:8JCgGVbRjJhVgD6399mQr4fx5rRfGKVzFjbj6RE/9UI=
+github.com/gobuffalo/flect v0.1.3/go.mod h1:8JCgGVbRjJhVgD6399mQr4fx5rRfGKVzFjbj6RE/9UI=
+github.com/gobuffalo/genny v0.0.0-20190329151137-27723ad26ef9/go.mod h1:rWs4Z12d1Zbf19rlsn0nurr75KqhYp52EAGGxTbBhNk=
+github.com/gobuffalo/genny v0.0.0-20190403191548-3ca520ef0d9e h1:JbHBQOMhE0wmpSuejnSkdnL2rULqQTwEGgVe85o7+No=
+github.com/gobuffalo/genny v0.0.0-20190403191548-3ca520ef0d9e/go.mod h1:80lIj3kVJWwOrXWWMRzzdhW3DsrdjILVil/SFKBzF28=
+github.com/gobuffalo/gitgen v0.0.0-20190315122116-cc086187d211/go.mod h1:vEHJk/E9DmhejeLeNt7UVvlSGv3ziL+djtTr3yyzcOw=
+github.com/gobuffalo/gogen v0.0.0-20190315121717-8f38393713f5 h1:f3Fpd5AqsFuTHUEhUeEMIFJkX8FpVnzdW+GpYxIyXkA=
+github.com/gobuffalo/gogen v0.0.0-20190315121717-8f38393713f5/go.mod h1:V9QVDIxsgKNZs6L2IYiGR8datgMhB577vzTDqypH360=
+github.com/gobuffalo/logger v0.0.0-20190315122211-86e12af44bc2 h1:8thhT+kUJMTMy3HlX4+y9Da+BNJck+p109tqqKp7WDs=
+github.com/gobuffalo/logger v0.0.0-20190315122211-86e12af44bc2/go.mod h1:QdxcLw541hSGtBnhUc4gaNIXRjiDppFGaDqzbrBd3v8=
+github.com/gobuffalo/mapi v1.0.1/go.mod h1:4VAGh89y6rVOvm5A8fKFxYG+wIW6LO1FMTG9hnKStFc=
+github.com/gobuffalo/mapi v1.0.2 h1:fq9WcL1BYrm36SzK6+aAnZ8hcp+SrmnDyAxhNx8dvJk=
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--- a/internal/app/cmd/root.go
+++ b/internal/app/cmd/root.go
@ -0,0 +1,120 @@
+// Copyright © 2019 Peter Kurfer
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmd
+
+import (
+	"fmt"
+	"github.com/baez90/go-reveal-slides/internal/app/config"
+	"github.com/fsnotify/fsnotify"
+	"os"
+
+	"github.com/mitchellh/go-homedir"
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+const (
+	defaultTheme string = "white"
+)
+
+var (
+	cfgFile             string
+	theme               string
+	codeTheme           string
+	horizontalSeparator string
+	verticalSeparator   string
+	rootCmd             = &cobra.Command{
+		Use:   "goveal",
+		Short: "goveal is a small reveal.js server",
+		Long: `goveal is a single static binary to host your reveal.js based markdown presentation.
+It is running a small web server that loads your markdown file, renders a complete HTML page and delivers it including all the reveal.js assets.
+It is not required to restart the server when you edit the markdown - a simple reload of the page is doing all the required magic.`,
+	}
+	params config.RevealParams
+)
+
+// Execute adds all child commands to the root command and sets flags appropriately.
+// This is called by main.main(). It only needs to happen once to the rootCmd.
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}
+
+func init() {
+	cobra.OnInitialize(initConfig)
+	cobra.OnInitialize(initLogging)
+
+	rootCmd.PersistentFlags().StringVar(&theme, "theme", defaultTheme, "reveal.js theme to use")
+	rootCmd.PersistentFlags().StringVar(&codeTheme, "code-theme", "monokai", "name of the code theme to use for highlighting")
+	rootCmd.PersistentFlags().StringVar(&horizontalSeparator, "horizontal-separator", "===", "horizontal separator in slides")
+	rootCmd.PersistentFlags().StringVar(&verticalSeparator, "vertical-separator", "---", "vertical separator in slides")
+	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.go-reveal-slides.yaml)")
+
+}
+
+func initLogging() {
+	log.SetFormatter(&log.TextFormatter{
+		ForceColors: true,
+	})
+}
+
+// initConfig reads in config file and ENV variables if set.
+func initConfig() {
+	if cfgFile != "" {
+		// Use config file from the flag.
+		viper.SetConfigFile(cfgFile)
+	} else {
+		// Find home directory.
+		home, err := homedir.Dir()
+		if err != nil {
+			log.Infof("Failed to determine home directory: %v", err)
+		} else {
+			viper.AddConfigPath(home)
+		}
+
+		cwd, err := os.Getwd()
+		if err != nil {
+			log.Infof("Failed to determine current working directory: %v", err)
+		} else {
+			viper.AddConfigPath(cwd)
+		}
+
+		viper.SetConfigName("goveal")
+	}
+
+	viper.AutomaticEnv() // read in environment variables that match
+
+	// If a config file is found, read it in.
+	if err := viper.ReadInConfig(); err == nil {
+		log.Info("Using config file:", viper.ConfigFileUsed())
+
+		log.Info("Starting to watch config file...")
+		viper.WatchConfig()
+		viper.OnConfigChange(func(in fsnotify.Event) {
+			log.Info("Noticed configuration change...")
+			params.Load()
+		})
+	}
+
+	if err := viper.BindPFlags(rootCmd.PersistentFlags()); err != nil {
+		log.Errorf("Failed to bind flags to viper")
+	}
+
+	params.Load()
+
+}
--- a/internal/app/cmd/serve.go
+++ b/internal/app/cmd/serve.go
@ -0,0 +1,71 @@
+// Copyright © 2019 Peter Kurfer peter.kurfer@googlemail.com
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmd
+
+import (
+	"fmt"
+	"github.com/baez90/go-reveal-slides/internal/app/template"
+	"github.com/gobuffalo/packr/v2"
+	"github.com/spf13/cobra"
+	"net/http"
+	"os"
+
+	log "github.com/sirupsen/logrus"
+)
+
+var (
+	host     string
+	port     uint16
+	serveCmd = &cobra.Command{
+		Use:   "serve",
+		Args:  cobra.ExactArgs(1),
+		Short: "",
+		Long:  ``,
+		Run: func(cmd *cobra.Command, args []string) {
+
+			tmplRenderer, err := template.NewRevealRenderer(args[0], &params)
+
+			if err != nil {
+				log.Errorf("Failed to initialize reveal renderer due to error: %v", err)
+				os.Exit(1)
+			}
+
+			log.Info("Setup reveal assets under route /reveal/ route...")
+			revealBox := packr.New("reveal-assets", "./../../../assets/reveal")
+			http.Handle("/reveal/", http.StripPrefix("/reveal/", http.FileServer(revealBox)))
+
+			//
+			log.Info("Setup static file serving under /local/ route...")
+			fs := http.FileServer(http.Dir("."))
+			http.Handle("/local/", http.StripPrefix("/local/", fs))
+
+			http.Handle("/", tmplRenderer)
+
+			hostPort := fmt.Sprintf("%s:%d", host, port)
+
+			log.Infof("Running at addr http://%s/", hostPort)
+			if err := http.ListenAndServe(hostPort, nil); err != nil {
+				log.Error("Error while running serve command: %v", err)
+			}
+		},
+	}
+)
+
+func init() {
+	rootCmd.AddCommand(serveCmd)
+
+	serveCmd.Flags().StringVar(&host, "host", "localhost", "host the CLI should listen on")
+	serveCmd.Flags().Uint16Var(&port, "port", 2233, "port the CLI should listen on")
+}
--- a/internal/app/config/reveal_params.go
+++ b/internal/app/config/reveal_params.go
@ -0,0 +1,31 @@
+// Copyright © 2019 Peter Kurfer peter.kurfer@googlemail.com
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import "github.com/spf13/viper"
+
+type RevealParams struct {
+	Theme               string
+	CodeTheme           string
+	HorizontalSeparator string
+	VerticalSeparator   string
+}
+
+func (params *RevealParams) Load() {
+	params.Theme = viper.GetString("theme")
+	params.CodeTheme = viper.GetString("code-theme")
+	params.HorizontalSeparator = viper.GetString("horizontal-separator")
+	params.VerticalSeparator = viper.GetString("vertical-separator")
+}
--- a/internal/app/template/renderer.go
+++ b/internal/app/template/renderer.go
@ -0,0 +1,103 @@
+// Copyright © 2019 Peter Kurfer peter.kurfer@googlemail.com
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package template
+
+import (
+	"fmt"
+	"github.com/baez90/go-reveal-slides/internal/app/config"
+	"github.com/gobuffalo/packr/v2"
+	"html/template"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"path"
+
+	log "github.com/sirupsen/logrus"
+)
+
+type RevealRenderer interface {
+	http.Handler
+	init() error
+}
+
+func NewRevealRenderer(markdownPath string, params *config.RevealParams) (renderer RevealRenderer, err error) {
+	var info os.FileInfo
+	info, err = os.Stat(markdownPath)
+	if err != nil {
+		return
+	}
+
+	if info.IsDir() || path.Ext(info.Name()) != ".md" {
+		err = fmt.Errorf("path %s did not pass sanity checks for markdown files", markdownPath)
+		return
+	}
+
+	renderer = &revealRenderer{
+		markdownPath: markdownPath,
+		params:       params,
+	}
+	err = renderer.init()
+
+	return
+}
+
+type revealRenderer struct {
+	markdownPath     string
+	template         *template.Template
+	renderedTemplate string
+	params           *config.RevealParams
+}
+
+func (renderer *revealRenderer) init() (err error) {
+	templateBox := packr.New("template", "./../../../assets/template")
+	templateString, err := templateBox.FindString("reveal-markdown.tmpl")
+	if err != nil {
+		return
+	}
+
+	renderer.template, err = template.New("index").Parse(templateString)
+	return
+}
+
+func (renderer *revealRenderer) ServeHTTP(response http.ResponseWriter, request *http.Request) {
+
+	if renderer.template == nil {
+		writeErrorResponse(500, "template is not set - probably error during startup", response)
+		return
+	}
+
+	markdownContent, err := ioutil.ReadFile(renderer.markdownPath)
+	if err != nil {
+		writeErrorResponse(500, "failed to read markdown content", response)
+		log.Errorf("Failed to read markdown content: %v", err)
+		return
+	}
+
+	err = renderer.template.Execute(response, struct {
+		Reveal       config.RevealParams
+		MarkdownBody string
+	}{Reveal: *renderer.params, MarkdownBody: string(markdownContent)})
+
+	if err != nil {
+		writeErrorResponse(500, "Failed to render Markdown to template", response)
+		log.Errorf("Failed to render Markdown template: %v", err)
+	}
+}
+
+func writeErrorResponse(code int, msg string, response http.ResponseWriter) {
+	response.WriteHeader(code)
+	_, err := response.Write([]byte(msg))
+	log.Errorf("Failed to write error reponse: %v", err)
+}
--- a/packr2_hack.go
+++ b/packr2_hack.go
@ -0,0 +1,20 @@
+// Copyright © 2019 Peter Kurfer peter.kurfer@googlemail.com
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package go_reveal_slides
+
+import (
+	_ "github.com/baez90/go-reveal-slides/internal/app/cmd"
+	_ "github.com/baez90/go-reveal-slides/internal/app/template"
+)