Yet Another Maven 'Plugin execution not covered by lifecycle configuration' Error - eclipse

Question

This POM.XML produces the following error on line 55:
Plugin execution not covered by lifecycle configuration: com.peterlavalle:sablecc-maven-plugin:3.7:generate (execution: default, phase: generate-sources)
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.conserveestate</groupId>
<artifactId>EstateAccountingInExLoader</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>EstateAccountingInExLoader</name>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>com.peterlavalle</groupId>
<artifactId>sablecc-maven-plugin</artifactId>
<version>3.7</version>
<configuration>
<sourceDirectory>${basedir}/src/main/resources</sourceDirectory>
<outputDirectory>${basedir}/src/main/gen-java</outputDirectory>
</configuration>
<executions>
<execution>
<goals>
<goal>generate</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>com.peterlavalle</groupId>
<artifactId>sablecc-maven-plugin</artifactId>
<version>3.7</version>
<configuration>
<sourceDirectory>${basedir}/src/main/resources</sourceDirectory>
<outputDirectory>${basedir}/src/main/gen-java</outputDirectory>
</configuration>
<executions>
<execution> <!-- Line 55: Error - Plugin execution not covered by lifecycle configuration -->
<goals>
<goal>generate</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
The error seems to indicate that the plug in is expecting a generate-sources goal instead of generate. If I change the goal to generate-sources, Eclipse removes the red X in the XML file and no errors are displayed, but... When I build the project, I get this error:
Could not find goal 'generate-sources' in plugin com.peterlavalle:sablecc-maven-plugin:3.7 among available goals generate
So this looks like a contradiction to me. I specify a goal of generate I get a message saying the plugin expects generate-sources but if I change the goal to generate-sources then I get a message which seems to indicate the plugin is expecting a goal of generate.
The plugin invokes SableCC (a compiler compiler) which reads a grammar file and generates Java source code that gets compiled along with my code that invokes the generated parser.
What am I doing wrong?
UPDATE
As per khmarbaise's suggestion, I tried this from the command line. Here are those results with a goal of generate-sources:
C:\Users\mbmas_000\workspace\EstateAccountingInExLoader>mvn clean install
[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for com.conserveestate:EstateAccountingInExLoader:jar:0.0.1-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. # line 38, column 12
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]
[INFO]
[INFO] -----------< com.conserveestate:EstateAccountingInExLoader >------------
[INFO] Building EstateAccountingInExLoader 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.364 s
[INFO] Finished at: 2020-06-03T09:33:28-07:00
[INFO] ------------------------------------------------------------------------
[ERROR] Could not find goal 'generate-sources' in plugin com.peterlavalle:sablecc-maven-plugin:3.7 among available goals generate -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoNotFoundException
C:\Users\mbmas_000\workspace\EstateAccountingInExLoader>
And again with a goal of generate. This time it works.
C:\Users\mbmas_000\workspace\EstateAccountingInExLoader>mvn clean install
[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for com.conserveestate:EstateAccountingInExLoader:jar:0.0.1-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. # line 38, column 12
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]
[INFO]
[INFO] -----------< com.conserveestate:EstateAccountingInExLoader >------------
[INFO] Building EstateAccountingInExLoader 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) # EstateAccountingInExLoader ---
[INFO] Deleting C:\Users\mbmas_000\workspace\EstateAccountingInExLoader\target
[INFO]
[INFO] --- sablecc-maven-plugin:3.7:generate (default) # EstateAccountingInExLoader ---
-- Generating parser for Scraper.grammar in C:\Users\mbmas_000\workspace\EstateAccountingInExLoader\src\main\gen-java
Adding productions and alternative of section AST.
Verifying identifiers.
Verifying ast identifiers.
Adding empty productions and empty alternative transformation if necessary.
Adding productions and alternative transformation if necessary.
computing alternative symbol table identifiers.
Verifying production transform identifiers.
Verifying ast alternatives transform identifiers.
Generating token classes.
Generating production classes.
Generating alternative classes.
Generating analysis classes.
Generating utility classes.
Generating the lexer.
State: INITIAL
- Constructing NFA.
.............................................................................................................................................................................................................................................................................................................................................
- Constructing DFA.
.........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
................................................................................................................................................................................
- resolving ACCEPT states.
Generating the parser.
.......................................................................................
.......................................................................................
.......................................................................................
..
.......................................................................................
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) # EstateAccountingInExLoader ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 1 resource
[INFO] Copying 2 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) # EstateAccountingInExLoader ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding Cp1252, i.e. build is platform dependent!
[INFO] Compiling 65 source files to C:\Users\mbmas_000\workspace\EstateAccountingInExLoader\target\classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) # EstateAccountingInExLoader ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) # EstateAccountingInExLoader ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) # EstateAccountingInExLoader ---
[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) # EstateAccountingInExLoader ---
[INFO] Building jar: C:\Users\mbmas_000\workspace\EstateAccountingInExLoader\target\EstateAccountingInExLoader-0.0.1-SNAPSHOT.jar
[INFO]
[INFO] --- maven-install-plugin:2.4:install (default-install) # EstateAccountingInExLoader ---
[INFO] Installing C:\Users\mbmas_000\workspace\EstateAccountingInExLoader\target\EstateAccountingInExLoader-0.0.1-SNAPSHOT.jar to C:\Users\mbmas_000\.m2\repository\com\conserveestate\EstateAccountingInExLoader\0.0.1-SNAPSHOT\EstateAccountingInExLoader-0.0.1-SNAPSHOT.jar
[INFO] Installing C:\Users\mbmas_000\workspace\EstateAccountingInExLoader\pom.xml to C:\Users\mbmas_000\.m2\repository\com\conserveestate\EstateAccountingInExLoader\0.0.1-SNAPSHOT\EstateAccountingInExLoader-0.0.1-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 6.091 s
[INFO] Finished at: 2020-06-03T09:30:32-07:00
[INFO] ------------------------------------------------------------------------
C:\Users\mbmas_000\workspace\EstateAccountingInExLoader>