Add go library to parse maven pom file

content/posts/go-library-maven-pom-parser.md

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+title = "Go library to parse Maven POM file"
+date = "2019-10-16"
+author = "Aloïs Micard"
+authorTwitter = "" #do not include @
+cover = ""
+tags = ["Golang"]
+keywords = ["", ""]
+description = ""
+showFullContent = false
++++
+
+I have recently written a little go tool that parse maven pom file to analyse dependencies between two projects in order to perform detailed analysis such as evolution of project dependencies, etc...
+
+After a bit of research I couldn't find any existing parser for Go and therefore I have decided to write one. As XML parsing is supported natively in Go there is not much work to do: only declare the structure that the Go XML parser will use.
+
+Since my parser was working great I have decided to open source it: [github.com/creekorful/mvnparser](https://github.com/creekorful/mvnparser)
+
+Let's take the following POM as example:
+
+```xml
+<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.example</groupId>
+    <artifactId>my-app</artifactId>
+    <version>1.0.0-SNAPSHOT</version>
+
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>javax.enterprise</groupId>
+            <artifactId>cdi-api</artifactId>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.0</version>
+                <configuration>
+                    <release>11</release>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>
+```
+
+You can parse it using the following code:
+
+```go
+package main
+
+import (
+	"github.com/creekorful/mvnparser"
+	"encoding/xml"
+	"log"
+)
+
+func main() { 
+    // filled with previously declared xml 
+    pomStr := "..."
+	
+    // Load project from string
+    var project mvnparser.MavenProject
+    if err := xml.Unmarshal([]byte(pomStr), &project); err != nil {
+        log.Fatalf("unable to unmarshal pom file. Reason: %s", err)
+    }
+    
+    log.Print(project.GroupId) // -> com.example
+    log.Print(project.ArtifactId) // -> my-app
+    log.Print(project.Version) // -> 1.0.0-SNAPSHOT
+    
+    // iterate over dependencies
+    for _, dep := range project.Dependencies {
+    	log.Print(dep.GroupId)
+    	log.Print(dep.ArtifactId)
+    	log.Print(dep.Version)
+    	
+    	// ...
+    }
+}
+```
+
+Happy hacking !