Travis CI setup

Author: dastrobu

.travis.yml

@@ -0,0 +1,54 @@
+# make sudo to enforce running on a real linux VM and not in a container on a macOS VM.
+sudo: required
+# do not use swift as language, since otherwise the build always runs on a macOS VM.
+language: c
+dist: trusty # Ubuntu 14.04 LTS
+osx_image: xcode9.3beta
+
+matrix:
+  include:
+    - os: linux
+      compiler: clang
+    - os: linux
+      compiler: gcc
+    - os: osx
+      compiler: clang
+
+before_install:
+  - uname -a
+  - |
+    if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
+      # update silently
+      brew update >/dev/null
+      brew upgrade swiftlint
+      # check swift version
+      swift --version
+    fi
+  - |
+    if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
+      sudo apt-get update
+      sudo apt-get install clang-3.6
+      export SWIFT_VERSION=4.1
+      # download swift
+      SWIFT_ARCHIVE=swift-$SWIFT_VERSION-RELEASE-ubuntu14.04.tar.gz
+      curl https://swift.org/builds/swift-$SWIFT_VERSION-release/ubuntu1404/swift-$SWIFT_VERSION-RELEASE/$SWIFT_ARCHIVE -s -o $SWIFT_ARCHIVE
+      tar xf $SWIFT_ARCHIVE
+      rm -f $SWIFT_ARCHIVE
+      # setup env for swift
+      export SWIFT_HOME=$(pwd)/swift-$SWIFT_VERSION-RELEASE-ubuntu14.04/usr/bin/
+      export PATH=$SWIFT_HOME:$PATH
+      # check swift version
+      swift --version
+    fi
+script:
+  - swift build
+  - swift test
+  - |
+    # lint on osx only (no need to do this on every platform)
+    if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
+      swiftlint --reporter json > swiftlint.json
+      cat swiftlint.json
+      # check for warnings as well
+      grep "Warning" swiftlint.json > /dev/null && echo "linting failed" && exit 1;
+      echo "linting passed"
+    fi

README.md

@@ -1,5 +1,9 @@
 # vincenty
 
+[![Swift Version](https://img.shields.io/badge/swift-4.1-blue.svg)](https://swift.org) 
+![Platform](https://img.shields.io/badge/platform-osx--64|linux--64-lightgrey.svg)
+[![Build Travis-CI Status](https://travis-ci.org/dastrobu/vincenty.png?branch=master)](https://travis-ci.org/dastrobu/vincenty.png?branch=master) 
+
 Solver for the inverse geodesic problem in Swift.
 
 The inverse geodesic problem must be solved to compute the distance between two points on an oblate spheroid, or 

Sources/vincenty/vincenty.swift

@@ -12,6 +12,9 @@ public enum ConvergenceError: Error {
 /// [WGS 84 ellipsoid](https://en.wikipedia.org/wiki/World_Geodetic_System) definition
 public let wgs84 = (a: 6378137.0, f: 1 / 298.257223563)
 
+/// π (for convenience)
+private let pi = Double.pi
+
 ///
 /// Compute the distance between two points on an ellipsoid.
 /// The ellipsoid parameters default to the WGS-84 parameters.
@@ -38,10 +41,10 @@ public func distance(_ x: (lat: Double, lon: Double),
     assert(tol > 0, "tol '\(tol)' ≤ 0")
 
     // validate lat and lon values
-    assert(x.lat >= -Double.pi / 2 && x.lat <= Double.pi / 2, "x.lat '\(x.lat)' outside [-π/2, π]")
-    assert(y.lat >= -Double.pi / 2 && y.lat <= Double.pi / 2, "y.lat '\(y.lat)' outside [-π/2, π]")
-    assert(x.lon >= -Double.pi && x.lon <= Double.pi, "x.lon '\(y.lon)' outside [-π, π]")
-    assert(y.lon >= -Double.pi && y.lon <= Double.pi, "y.lon '\(y.lon)' outside [-π, π]")
+    assert(x.lat >= -pi / 2 && x.lat <= pi / 2, "x.lat '\(x.lat)' outside [-π/2, π]")
+    assert(y.lat >= -pi / 2 && y.lat <= pi / 2, "y.lat '\(y.lat)' outside [-π/2, π]")
+    assert(x.lon >= -pi && x.lon <= pi, "x.lon '\(y.lon)' outside [-π, π]")
+    assert(y.lon >= -pi && y.lon <= pi, "y.lon '\(y.lon)' outside [-π, π]")
 
     // shortcut for zero distance
     if x == y {

Tests/LinuxMain.swift

@@ -1,7 +1,7 @@
 import XCTest
 
-import GeodesicsTests
+import vincentyTests
 
 var tests = [XCTestCaseEntry]()
-tests += GeodesicsTests.allTests()
+tests += vincentyTests.allTests()
 XCTMain(tests)

Tests/vincentyTests/vincentyTests.swift

@@ -2,7 +2,6 @@ import XCTest
 @testable import vincenty
 
 // some constants
-
 private let zero = (lat: 0.0, lon: 0.0)
 private let northPole = (lat: Double.pi / 2, lon: 0.0)
 private let southPole = (lat: -Double.pi / 2, lon: 0.0)
@@ -81,9 +80,12 @@ final class VincentyTests: XCTestCase {
         XCTAssertEqual(try! distance(x, y), 111319.491, accuracy: delta)
     }
 
+#if !os(macOS)
     static var allTests = [
-        ("testShortcutForEqualPoints", testShortcutForEqualPoints),
-        ("testPoles", testPoles),
         ("testGrs80", testGrs80),
+        ("testPoles", testPoles),
+        ("testShortcutForEqualPoints", testShortcutForEqualPoints),
+        ("testVincentyDistance", testVincentyDistance),
     ]
+#endif
 }