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2.7 KiB
Markdown
95 lines
No EOL
2.7 KiB
Markdown
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title = "Go library to parse Maven POM file"
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date = "2019-10-16"
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author = "Aloïs Micard"
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authorTwitter = "" #do not include @
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cover = ""
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tags = ["Golang"]
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keywords = ["", ""]
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description = ""
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showFullContent = false
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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...
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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.
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Since my parser was working great I have decided to open source it: [github.com/creekorful/mvnparser](https://github.com/creekorful/mvnparser)
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Let's take the following POM as example:
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```xml
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.example</groupId>
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<artifactId>my-app</artifactId>
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<version>1.0.0-SNAPSHOT</version>
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<dependencies>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>javax.enterprise</groupId>
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<artifactId>cdi-api</artifactId>
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<scope>provided</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.8.0</version>
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<configuration>
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<release>11</release>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>
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```
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You can parse it using the following code:
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```go
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package main
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import (
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"github.com/creekorful/mvnparser"
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"encoding/xml"
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"log"
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)
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func main() {
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// filled with previously declared xml
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pomStr := "..."
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// Load project from string
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var project mvnparser.MavenProject
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if err := xml.Unmarshal([]byte(pomStr), &project); err != nil {
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log.Fatalf("unable to unmarshal pom file. Reason: %s", err)
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}
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log.Print(project.GroupId) // -> com.example
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log.Print(project.ArtifactId) // -> my-app
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log.Print(project.Version) // -> 1.0.0-SNAPSHOT
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// iterate over dependencies
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for _, dep := range project.Dependencies {
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log.Print(dep.GroupId)
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log.Print(dep.ArtifactId)
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log.Print(dep.Version)
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// ...
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}
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}
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```
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Happy hacking ! |