From c1b906c368478ee50a635d2ffd0cc7069ae143cb Mon Sep 17 00:00:00 2001
From: Dave Machado <dave@davemachado.com>
Date: Fri, 21 Jul 2017 14:45:05 -0400
Subject: [PATCH 1/4] set variable for file to check

---
 build/main.sh | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/build/main.sh b/build/main.sh
index 62636aa2..f089ce12 100755
--- a/build/main.sh
+++ b/build/main.sh
@@ -1,6 +1,7 @@
 #!/bin/bash
+CHECK_FILE=../README.md
 echo "running format validation..."
-./validate_format.rb ../README.md
+./validate_format.rb $CHECK_FILE
 if [[ $? != 0 ]]; then
     echo "format validation failed!"
     exit 1
@@ -10,7 +11,7 @@ fi
 
 if [ "$TRAVIS_BRANCH" == "master" ]; then
     echo "running link validation..."
-    ./validate_links.rb ../README.md
+    ./validate_links.rb $CHECK_FILE
     if [[ $? != 0 ]]; then
         echo "link validation failed!"
         exit 1

From 530d404408348719e06471655f40abad450a9696 Mon Sep 17 00:00:00 2001
From: Dave Machado <dave@davemachado.com>
Date: Fri, 21 Jul 2017 14:47:59 -0400
Subject: [PATCH 2/4] set PR additions file as link validation file

---
 build/main.sh | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/build/main.sh b/build/main.sh
index f089ce12..8cadd34f 100755
--- a/build/main.sh
+++ b/build/main.sh
@@ -1,7 +1,16 @@
 #!/bin/bash
-CHECK_FILE=../README.md
+FORMAT_FILE=../README.md
+if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then
+    echo "running on Pull Request #$TRAVIS_PULL_REQUEST"
+    git show | egrep "\+" > additions.txt
+    LINK_FILE=additions.txt
+else
+    echo "running on $TRAVIS_BRANCH branch"
+    LINK_FILE=../README.md
+fi
+
 echo "running format validation..."
-./validate_format.rb $CHECK_FILE
+./validate_format.rb $FORMAT_FILE
 if [[ $? != 0 ]]; then
     echo "format validation failed!"
     exit 1
@@ -11,7 +20,7 @@ fi
 
 if [ "$TRAVIS_BRANCH" == "master" ]; then
     echo "running link validation..."
-    ./validate_links.rb $CHECK_FILE
+    ./validate_links.rb $LINK_FILE
     if [[ $? != 0 ]]; then
         echo "link validation failed!"
         exit 1

From ab5d27c575de36bd649981ab957d3f32546c1421 Mon Sep 17 00:00:00 2001
From: Dave Machado <dave@davemachado.com>
Date: Fri, 21 Jul 2017 14:51:23 -0400
Subject: [PATCH 3/4] print out additions being validated

---
 build/main.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/build/main.sh b/build/main.sh
index 8cadd34f..1da22e1e 100755
--- a/build/main.sh
+++ b/build/main.sh
@@ -3,6 +3,8 @@ FORMAT_FILE=../README.md
 if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then
     echo "running on Pull Request #$TRAVIS_PULL_REQUEST"
     git show | egrep "\+" > additions.txt
+    echo "--ADDITIONS--"
+    cat additions.txt
     LINK_FILE=additions.txt
 else
     echo "running on $TRAVIS_BRANCH branch"

From 90e4670ce40d1d776480aeab1d737c64b3918a5f Mon Sep 17 00:00:00 2001
From: Dave Machado <dave@davemachado.com>
Date: Fri, 21 Jul 2017 14:59:33 -0400
Subject: [PATCH 4/4] check for no links in link file and fail if not pull
 request

---
 build/main.sh           | 3 +++
 build/validate_links.rb | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/build/main.sh b/build/main.sh
index 1da22e1e..bc46dfdf 100755
--- a/build/main.sh
+++ b/build/main.sh
@@ -27,6 +27,9 @@ if [ "$TRAVIS_BRANCH" == "master" ]; then
         echo "link validation failed!"
         exit 1
     else
+        if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then
+            echo "no links to check on $TRAVIS_BRANCH branch - script failure!"
+        fi
         echo "link validation passed!"
     fi
 fi
diff --git a/build/validate_links.rb b/build/validate_links.rb
index a3f318e2..5bf27cae 100755
--- a/build/validate_links.rb
+++ b/build/validate_links.rb
@@ -17,6 +17,10 @@ raw_links.each do |link|
         links.push(link)
     end
 end
+if links.length <= 0
+    puts "no links to check"
+    exit(0)
+end
 fails = []
 # Fail on any duplicate elements
 dup = links.select{|element| links.count(element) > 1}