replace travis with Cirrus CI

Author: Karl-Johan Alm

.cirrus.yml

@@ -0,0 +1,7 @@
+version: 2.1
+
+container:
+  image: node:latest
+
+check_task:
+  test_script: scripts/test_all.sh

.travis.yml

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+diff README.mediawiki /tmp/table.mediawiki | grep '^[<>] |' >/tmp/after.diff || true
+if git checkout HEAD^ && scripts/buildtable.pl >/tmp/table.mediawiki 2>/dev/null; then
+    diff README.mediawiki /tmp/table.mediawiki | grep '^[<>] |' >/tmp/before.diff || true
+    newdiff=$(diff -s /tmp/before.diff /tmp/after.diff -u | grep '^+')
+    if [ -n "$newdiff" ]; then
+        echo "$newdiff"
+        exit 1
+    fi
+else
+    echo 'Cannot build previous commit table for comparison'
+fi

scripts/diffcheck.sh

@@ -8,7 +8,8 @@
 
 ECODE=0
 FILES=""
-for fname in $(git diff --name-only HEAD $(git merge-base HEAD master)); do
+git fetch origin master
+for fname in $(git diff --name-only HEAD $(git merge-base HEAD origin/master)); do
     if [[ $fname == *.mediawiki ]]; then
         GRES=$(grep -n '](http' $fname)
         if [ "$GRES" != "" ]; then

scripts/link-format-chk.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+#  test_link_format:
+scripts/link-format-chk.sh
+#  test_buildtable:
+scripts/buildtable.pl >/tmp/table.mediawiki || exit 1
+#  test_diff:
+scripts/diffcheck.sh