From da9e282d834f0e2128501a8154128dc95b4c599d Mon Sep 17 00:00:00 2001
From: Julien Lepiller <julien@lepiller.eu>
Date: Sat, 9 Sep 2017 20:34:38 +0200
Subject: [PATCH] Add a script to generate component.xml files.

plexus-component-metadata is normally used for this task, but it
depends on maven-core, which depends on maven-model-builder, which needs
plexus-component-metadata. This script is meant to break this dependency
cycle.
---
 components.sh | 132 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100755 components.sh

diff --git a/components.sh b/components.sh
new file mode 100755
index 0000000..c6748bd
--- /dev/null
+++ b/components.sh
@@ -0,0 +1,148 @@
+## This script generates a rough plexus/components.xml file. It is meant to
+## replace plexus-component-metadata as it eventually has a recursive dependency
+## on itself.
+##
+## This script must be run in the source directory (usually src/main/java).
+
+# Finds the complete name from a class name.
+function find_role() {
+    role=$1
+    # Find role
+    case $role in
+      "SettingsWriter" | "SettingsReader")
+        role=org.apache.maven.settings.io.$role
+        ;;
+      "SecDispatcher")
+        role=org.sonatype.plexus.components.sec.dispatcher.$role
+        ;;
+      "SettingsDecrypter")
+        role=org.apache.maven.settings.crypto.$role
+        ;;
+      "SettingsBuilder")
+        role=org.apache.maven.settings.building.$role
+        ;;
+      "SettingsValidator")
+        role=org.apache.maven.settings.validation.$role
+        ;;
+      "LoggerFactory")
+        role=org.eclipse.aether.spi.log.$role
+        ;;
+      "RemoteRepositoryManager" | "VersionResolver" | "VersionRangeResolver" \
+      | "ArtifactResolver" | "RepositoryEventDispatcher" | "MetadataResolver" \
+      | "SyncContextFactory" | "MetadataGeneratorFactory" | "MetadatResolver" \
+      | "ArtifactDescriptorReader")
+        role=org.eclipse.aether.impl.$role
+        ;;
+      "ModelBuilder" | "ModelProcessor")
+        role=org.apache.maven.model.building.$role
+        ;;
+      "ModelValidator")
+        role=org.apache.maven.model.validation.$role
+        ;;
+      "ProfileInjector" | "ProfileSelector")
+        role=org.apache.maven.model.profile.$role
+        ;;
+      "ProfileActivator")
+        role=org.apache.maven.model.profile.activation.$role
+        ;;
+      "SuperPomProvider")
+        role=org.apache.maven.model.superpom.$role
+        ;;
+      "ReportConfigurationExpander" | "PluginConfigurationExpander" \
+      | "ReportingConverter" | "LifecycleBindingsInjector")
+        role=org.apache.maven.model.plugin.$role
+        ;;
+      "ModelLocator")
+        role=org.apache.maven.model.locator.$role
+        ;;
+      "ModelPathTranslator" | "PathTranslator" | "UrlNormalizer" | "ModelUrlNormalizer")
+        role=org.apache.maven.model.path.$role
+        ;;
+      "DependencyManagementInjector" | "PluginManagementInjector")
+        role=org.apache.maven.model.management.$role
+        ;;
+      "ModelWriter" | "ModelReader")
+        role=org.apache.maven.model.io.$role
+        ;;
+      "DependencyManagementImporter")
+        role=org.apache.maven.model.composition.$role
+        ;;
+      "ModelNormalizer")
+        role=org.apache.maven.model.normalization.$role
+        ;;
+      "ModelInterpolator")
+        role=org.apache.maven.model.interpolation.$role
+        ;;
+      "InheritanceAssembler")
+        role=org.apache.maven.model.inheritance.$role
+        ;;
+      *)
+        role=$role
+        ;;
+    esac
+    echo $role
+}
+
+function generate_xml() {
+echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
+echo "<component-set>"
+echo "<components>"
+
+for file in `find -name '*.java'`; do
+  annot=`grep "@Component" $file`
+  if [ "$?" == "0" ]; then
+    # We have a component!
+    role=$(echo $annot | sed 's|.*role = \(.*\).class.*|\1|')
+    role_hint=$(echo $annot | sed 's|.*hint = "\(.*\)" .*|\1|')
+    if [ "$role_hint" = "$annot" ]; then
+      role_hint=default
+    fi
+    implem=$(echo $file | sed -e 's|^\./||' -e 's|\.java||' -e 's|/|.|g')
+    role=$(find_role $role)
+
+    echo "<component>"
+    echo "  <role>$role</role>"
+    echo "  <role-hint>$role_hint</role-hint>"
+    echo "  <implementation>$implem</implementation>"
+    echo "  <description />"
+    echo "  <isolated-realm>false</isolated-realm>"
+    echo "  <requirements>"
+    reqn=1
+    cont=true
+    while [ "$cont" = "true" ]; do
+      requirement=$(grep "@Requirement" $file -A1 | head -n ${reqn} | tail -1)
+      ((reqn++))
+      property=$(grep "@Requirement" $file -A1 | head -n ${reqn} | tail -1)
+      if (echo $requirement | grep "@Requirement" >/dev/null); then
+        ((reqn++))
+        ((reqn++))
+        optional=$(echo $requirement | sed 's|.*optional = \(.*\) .*|\1|')
+        req_role=$(echo $requirement | sed 's|.*role = \(.*\).class .*|\1|')
+        if (echo $req_role | grep "@Requirement" >/dev/null); then
+          req_role=$(echo $property | sed 's|.*private \(.*\) .*|\1|')
+        fi
+        req_role=$(find_role $req_role)
+        req_name=$(echo $property | sed 's|[^ ]* [^ ]* \([^ ;]*\).*|\1|')
+        echo "    <requirement>"
+        echo "      <role>$req_role</role>"
+        echo "      <field-name>$req_name</field-name>"
+        if (echo $optional | grep "@Requirement" >/dev/null); then
+          :
+        else
+          echo "      <optional>$optional</optional>"
+        fi
+        echo "    </requirement>"
+      else
+        cont=false
+      fi
+    done
+    echo "  </requirements>"
+    echo "</component>"
+  fi
+done
+
+echo "</components>"
+echo "</component-set>"
+}
+
+(cd $1; generate_xml) > $2
-- 
2.14.1