After 2+ hours I was able to get the maven-scm-provider-hg extension (for pushing to mercurial repos from Maven) semi working, meaning that it was executing commands instead of just giving errors.

However I think I've run into a wall with this error

[INFO] [deploy:deploy {execution: default-deploy}]
[INFO] Retrieving previous build number from pircbotx.googlecode.com
[INFO] Removing C:\DOCUME~1\Owner\LOCALS~1\Temp\wagon-scm1210107000.checkout\pir    cbotx\pircbotx\1.3-SNAPSHOT
[INFO] EXECUTING: cmd.exe /X /C "hg clone -r tip https://*SNIP*@site.pircbotx.googlecode.com/hg/maven2/snapshots/pircbotx/pircbotx/1.3-SNAPSHOT C:\DOCUME~1\Owner\LOCALS~1\Temp\wagon-scm1210107000.checkout\pircbotx\pircbotx\1.3-SNAPSHOT"
[INFO] EXECUTING: cmd.exe /X /C "hg locate"
[INFO] repository metadata for: 'snapshot pircbotx:pircbotx:1.3-SNAPSHOT' could not be found on repository: pircbotx.googlecode.com, so will be created Uploading: scm:hg:https://site.pircbotx.googlecode.com/hg/maven2/snapshots/pircbotx/pircbotx/1.3-SNAPSHOT/pircbotx-1.3-SNAPSHOT.jar
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Error deploying artifact: Error listing repository: No such command 'list'.

What on earth would cause that error? I'm on a Windows box, so any commands that aren't commands give "'list' is not recognized as an internal or external command...", not "No such command 'list'."

POM

<build>
    <extensions>
        <extension>
            <groupId>org.apache.maven.scm</groupId>
            <artifactId>maven-scm-provider-hg</artifactId>
            <version>1.4</version>
        </extension>
        <extension>
            <groupId>org.apache.maven.wagon</groupId>
            <artifactId>wagon-scm</artifactId>
            <version>1.0-beta-7</version>
        </extension>
    </extensions>
     ...

<distributionManagement>
    <snapshotRepository>
        <id>pircbotx.googlecode.com</id>
        <name>PircBotX Site</name>
        <url>scm:hg:https://site.pircbotx.googlecode.com/hg/maven2/snapshots</url>
        <uniqueVersion>false</uniqueVersion>
    </snapshotRepository>
</distributionManagement>

Mercurial version

W:\programming\pircbot-hg>hg version
Mercurial Distributed SCM (version 1.7.2)

Any suggestions?