Fix parsing of docker-compose < 1.25.2 output on narrow terminals

Author: albanf

docker-compose-rule-core/src/main/java/com/palantir/docker/compose/connection/Ports.java

@@ -18,11 +18,13 @@
 import com.google.common.base.Preconditions;
 import com.google.common.base.Strings;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 public final class Ports {
@@ -55,8 +57,12 @@ public Stream<DockerPort> stream() {
     }
 
     public static Ports parseFromDockerComposePs(String psOutput, String dockerMachineIp) {
-        Preconditions.checkArgument(!Strings.isNullOrEmpty(psOutput), "No container found");
-        Matcher matcher = PORT_PATTERN.matcher(psOutput);
+        // Clean the ps output to remove line breaks and unneeded spaces
+        String cleanOutput = Arrays.stream(psOutput.split("\\R"))
+                .map(String::trim)
+                .collect(Collectors.joining(""));
+        Preconditions.checkArgument(!Strings.isNullOrEmpty(cleanOutput), "No container found");
+        Matcher matcher = PORT_PATTERN.matcher(cleanOutput);
         List<DockerPort> ports = new ArrayList<>();
         while (matcher.find()) {
             String matchedIpAddress = matcher.group(IP_ADDRESS);
@@ -66,7 +72,7 @@ public static Ports parseFromDockerComposePs(String psOutput, String dockerMachi
 
             ports.add(new DockerPort(ip, externalPort, internalPort));
         }
-        Matcher rangeMatcher = PORT_RANGE_PATTERN.matcher(psOutput);
+        Matcher rangeMatcher = PORT_RANGE_PATTERN.matcher(cleanOutput);
         while (rangeMatcher.find()) {
             String matchedIpAddress = rangeMatcher.group(IP_ADDRESS);
             String ip = matchedIpAddress.equals(NO_IP_ADDRESS) ? dockerMachineIp : matchedIpAddress;

docker-compose-rule-core/src/test/java/com/palantir/docker/compose/connection/PortsShould.java

@@ -95,6 +95,23 @@ public void parse_actual_docker_compose_output() {
         assertThat(ports, is(expected));
     }
 
+    @Test
+    public void parse_docker_compose_output_on_narrow_terminal() {
+        String psOutput =
+                "         Name                 Command             State              Ports       \n" +
+                        "--------------------------------------------------------------------------------\n" +
+                        "projectnamemyserv   docker-entrypoint.sh   Up (healthy)   4510/tcp, 4511/tcp,\n" +
+                        "ice_localstack_1                                          4512/tcp, 4513/tcp,\n" +
+                        "                                                          4514/tcp, 4515/tcp,\n" +
+                        "                                                          4558/tcp, 4559/tcp,\n" +
+                        "                                                          0.0.0.0:49153->4566\n" +
+                        "                                                          /tcp,:::49153->4566\n" +
+                        "                                                          /tcp, 5678/tcp     ";
+        Ports ports = Ports.parseFromDockerComposePs(psOutput, LOCALHOST_IP);
+        Ports expected = new Ports(newArrayList(new DockerPort(LOCALHOST_IP, 49153, 4566)));
+        assertThat(ports, is(expected));
+    }
+
     @Test
     public void throw_illegal_state_exception_when_no_running_container_found_for_service() {
         exception.expect(IllegalArgumentException.class);