JUG Saxony Day Dirk Mahler

Transcription

1 by JUG Saxony Day 2017 Dirk Mahler

2 Motivation jqassistant The Git Graph Demo Q&A 2

3 Shadows Of The Past Analysis Of Git Repositories 3

4 + Adam Tornhill 4

5 Shadows Of The Past Analysis Of Git Repositories 5

6 Open Source: GPLv3 Current release: initiated: 03/2013 first stable release: 04/2015 Neo4j Community Edition embedded, no installation necessary 6

7 The Idea Scan software structures Store in a database Execute queries Explore Add high level concepts Find constraint violations Database Create reports 7

8 Scan Plugins Command Line/ Maven Analyze Plugins Report Plugins 8

9 Available scanner plugins ZIP JAR, WAR, EAR GZ Liquibase *.class *.properties *.yaml MANIFEST.MF /META-INF/services/* web.xml application.xml beans.xml CheckStyle JaCoCo FindBugs Git pom.xml surefire-reports.xml *.xsd Plugin API is public M2 Repository RDBMS Schema 9

10 Getting Started Maven Project <build> <plugins> <plugin> <groupid>com.buschmais.jqassistant</groupid> <artifactid>jqassistant-maven-plugin</artifactid> <version>1.x.x</version> </plugin> </plugins> </build> mvn install mvn jqassistant:scan mvn jqassistant:server 10

11 The Git Plugin <plugin> <groupid>com.buschmais.jqassistant</groupid> <artifactid>jqassistant-maven-plugin</artifactid> <version>1.x.x</version> <scanincludes> <scaninclude> <path>${project.basedir}/.git</path> </scaninclude> </scanincludes> <dependency> <groupid>de.kontext-e.jqassistant.plugin</groupid> <artifactid>jqassistant.plugin.git</artifactid> <version>1.2.0</version> </dependency> </plugin> 11

12 Shadows Of The Past Analysis Of Git Repositories 12

13 The Git History Is A Graph! File Tag MODIFIES ON_COMMIT Change Commit Commit Branch HAS_PARENT HAS_HEAD CONTAINS_CHANGE HAS_PARENT HAS_PARENT Commit Commit Commit Commit Branch HAS_PARENT HAS_PARENT HAS_PARENT HAS_HEAD COMMITTED COMMITTED Author 13

14 Explore Git Using Queries Which author did a commit? Author Commit COMMITTED Let s convert this to ASCII art () as nodes -[]-> as directed relationships 14

15 Explore Git Using Queries Which author did a commit? Let s convert this to ASCII art () as nodes -[]-> as directed relationships ()-[]->() 15

16 Explore Git Using Queries Which author did a commit? a c Let s convert this to ASCII art () as nodes -[]-> as directed relationships (a)-[]->(c) 16

17 Explore Git Using Queries Which author did a commit? a COMMITTED c Let s convert this to ASCII art () as nodes -[]-> as directed relationships (a)-[:committed]->(c) 17

18 Explore Git Using Queries Which author did a commit? a Author COMMITTED c Commit Let s convert this to ASCII art () as nodes -[]-> as directed relationships (a:author)-[:committed]->(c:commit) 18

19 Explore Git Using Queries Which author did a commit? a Author COMMITTED c Commit Pattern matching is the core principle of Cypher MATCH (a:author)-[:committed]->(c:commit) RETURN a.name, c.message 19

20 Shadows Of The Past Analysis Of Git Repositories 20

21 DukeCon (fork) 21

22 Findings Expert knowledge Technologies Functional areas Critical Phases Distribution of changes over time Hotspots Frequency of changes correlated with code metrics Content of commit messages Temporal Coupling Files that are often changed together 22

23 by Web: jqassistant.org Google Group: jqassistant Stackoverflow Tag: jqassistant