Added bottom navigation for previous and next lessons

_2020/command-line.md

@@ -3,6 +3,8 @@ layout: lecture
 title: "Command-line Environment"
 date: 2020-01-21
 ready: true
+previous_lesson: "/2020/data-wrangling"
+next_lesson: "/2020/version-control"
 video:
   aspect: 56.25
   id: e8BO_dYxk5c

_2020/course-shell.md

@@ -3,6 +3,7 @@ layout: lecture
 title: "Course overview + the shell"
 date: 2020-01-13
 ready: true
+next_lesson: "/2020/shell-tools"
 video:
   aspect: 56.25
   id: Z56Jmr9Z34Q

_2020/data-wrangling.md

@@ -3,6 +3,8 @@ layout: lecture
 title: "Data Wrangling"
 date: 2020-01-16
 ready: true
+previous_lesson: "/2020/editors"
+next_lesson: "/2020/command-line"
 video:
   aspect: 56.25
   id: sz_dsktIjt4

_2020/debugging-profiling.md

@@ -3,6 +3,8 @@ layout: lecture
 title: "Debugging and Profiling"
 date: 2020-01-23
 ready: true
+previous_lesson: "/2020/version-control"
+next_lesson: "/2020/metaprogramming"
 video:
   aspect: 56.25
   id: l812pUnKxME

_2020/editors.md

@@ -3,6 +3,8 @@ layout: lecture
 title: "Editors (Vim)"
 date: 2020-01-15
 ready: true
+previous_lesson: "/2020/shell-tools"
+next_lesson: "/2020/data-wrangling"
 video:
   aspect: 56.25
   id: a6Q8Na575qc

_2020/metaprogramming.md

@@ -4,6 +4,8 @@ title: "Metaprogramming"
 details: build systems, dependency management, testing, CI
 date: 2020-01-27
 ready: true
+previous_lesson: "/2020/debugging-profiling"
+next_lesson: "/2020/security"
 video:
   aspect: 56.25
   id: _Ms1Z4xfqv4

_2020/potpourri.md

@@ -3,6 +3,8 @@ layout: lecture
 title: "Potpourri"
 date: 2020-01-29
 ready: true
+previous_lesson: "/2020/security"
+next_lesson: "/2020/qa"
 video:
   aspect: 56.25
   id: JZDt-PRq0uo

_2020/qa.md

@@ -3,6 +3,7 @@ layout: lecture
 title: "Q&A"
 date: 2020-01-30
 ready: true
+previous_lesson: "/2020/potpourri"
 video:
   aspect: 56.25
   id: Wz50FvGG6xU

_2020/security.md

@@ -3,6 +3,8 @@ layout: lecture
 title: "Security and Cryptography"
 date: 2020-01-28
 ready: true
+previous_lesson: "/2020/metaprogramming"
+next_lesson: "/2020/potpourri"
 video:
   aspect: 56.25
   id: tjwobAmnKTo

_2020/shell-tools.md

@@ -3,6 +3,8 @@ layout: lecture
 title: "Shell Tools and Scripting"
 date: 2020-01-14
 ready: true
+previous_lesson: "/2020/course-shell"
+next_lesson: "/2020/editors"
 video:
   aspect: 56.25
   id: kgII-YWo3Zw

_2020/version-control.md

@@ -3,6 +3,8 @@ layout: lecture
 title: "Version Control (Git)"
 date: 2020-01-22
 ready: true
+previous_lesson: "/2020/command-line"
+next_lesson: "/2020/debugging-profiling"
 video:
   aspect: 56.25
   id: 2sjqTHE0zok

_layouts/lecture.html

@@ -14,7 +14,15 @@ <h1 class="title">{{ page.title }}{% if page.subtitle %} <span class="subtitle">
 
 {{ content }}
 
-<hr>
+<hr />
+
+<div class="small bottom_nav">
+  {% if page.previous_lesson %}
+  <a href="{{page.previous_lesson}}" class="previous_lesson">Previous</a>
+  {% endif %} {% if page.next_lesson %}
+  <a href="{{page.next_lesson}}" class="next_lesson">Next</a>
+{% endif %}
+</div>
 
 <div class="small center">
 <p><a href="https://github.com/missing-semester/missing-semester/blob/master/{{ page.path }}">Edit this page</a>.</p>

static/css/main.css

@@ -378,3 +378,20 @@ input[type=checkbox]:checked ~ .menu-label:after {
     content: "("attr(href)")"; font-family: monospace; margin: 0 .25em;
   }
 }
+
+.bottom_nav {
+  display: flex;
+  margin-bottom: 1.5rem;
+}
+
+.previous_lesson::before {
+  content: "< ";
+}
+
+.next_lesson {
+  margin-left: auto;
+}
+
+.next_lesson::after {
+  content: " >";
+}