Add john--'s travis scripts

.travis.yml

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+# This is a travis-ci.org continuous integration configuration file.
+language: node_js
+node_js:
+  - 12
+
+cache:
+  npm: true
+  directories:
+  - travis_cache
+
+before_install:
+  - chmod +x ./travis_scripts/ci-build.sh
+  - npm install remark-cli remark-validate-links
+
+script: ./travis_scripts/ci-build.sh

travis_scripts/ci-build.sh

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+#!/bin/bash
+
+BASE_DIR=${PWD}
+CACHE_DIR=${PWD}/travis_cache
+
+chmod +x ${BASE_DIR}/travis_scripts/*.py
+
+ADMESH_DIR=${CACHE_DIR}/admesh-0.98.4
+mkdir -p ${CACHE_DIR}
+cd ${CACHE_DIR}
+if [ ! -d ${ADMESH_DIR} ]; then
+  echo "Admesh cache miss; fetching and building ..."
+  wget https://github.com/admesh/admesh/releases/download/v0.98.4/admesh-0.98.4.tar.gz
+  tar -zxf admesh-0.98.4.tar.gz
+  cd ${ADMESH_DIR}
+  ./configure
+  make
+  chmod +x admesh
+fi
+cd ${BASE_DIR}
+sudo ln -s ${ADMESH_DIR}/admesh /usr/bin/admesh
+
+if [ "$TRAVIS_PULL_REQUEST" == "false" ]; then
+  # Compare branch against master
+  git remote set-branches --add origin master
+  git fetch
+  git diff --name-only --diff-filter=AMR origin/master | xargs -n 1 -I {} ${BASE_DIR}/travis_scripts/validate-file.py ${BASE_DIR}/{}
+else
+  # Compare head against the branch to merge into (PR)
+  git diff --name-only --diff-filter=AMR -R HEAD origin/${TRAVIS_BRANCH} | xargs -n 1 -I {} ${BASE_DIR}/travis_scripts/validate-file.py ${BASE_DIR}/{}
+fi
+
+cd ${BASE_DIR}
+
+# Validate all markdown files (eg, README.md).
+remark -u validate-links --no-stdout --frail .
+
+

travis_scripts/validate-file.py

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+#!/usr/bin/python3
+import subprocess, re, os, sys, getopt
+
+def read_param(text, parameter):
+    matches = re.search("(" + parameter + ")\s+\:\s+(\d+)", text)
+    #print(matches)
+    if matches:
+        # The decimal group
+        return int(matches.group(2))
+    else:
+        # Uh oh, no match
+        print ("Could not find {0}".format(parameter))
+        exit(1)
+
+def assert_param_threshold(result, parameter, threshold):
+    param_val = read_param(result, parameter)
+    if param_val > threshold:
+        print ("!! Detected \"{0}\" value of {1}".format(parameter, param_val))
+        exit(1)
+    #else:
+        #print ("{0} value OK".format(parameter))
+
+def process_stl(filename):
+    cmd = "admesh \"{0}\"".format(filename)
+    print ("Validating STL {0}".format(filename))
+    result = subprocess.run(cmd, shell=True, check=True, stdout=subprocess.PIPE)
+    output = str(result.stdout)
+
+    assert_param_threshold(output, "Edges fixed", 0)
+    assert_param_threshold(output, "Backwards edges", 0)
+    assert_param_threshold(output, "Degenerate facets", 0)
+    assert_param_threshold(output, "Facets removed", 0)
+    assert_param_threshold(output, "Facets added", 0)
+    assert_param_threshold(output, "Facets reversed", 0)
+    
+def process_markdown(filename):    
+    cmd = "remark -u validate-links --no-stdout --frail \"{0}\"".format(filename)
+    print ("Validating Markdown {0}".format(filename))
+    subprocess.run(cmd, shell=True, check=True)  
+    
+def main(argv):
+    argument = " ".join(sys.argv[1:])
+
+    if argument.lower().endswith(".stl"):
+      process_stl(argument)
+
+if __name__ == "__main__":
+   main(sys.argv[1:])