離線/斷開連接時解決Apache Ivy依賴關系？

Question

當脫機/斷開連接時，如何讓Ivy從本地緩存中解析依賴關系（包括使用changing="true"依賴關系）？

我正在開發一個基於Java的開源項目，該項目使用Apache Ivy來解析和下載第三方依賴項。 項目的build.xml有一個名為resolve的ant目標，可以下載Ivy（如果需要），然后使用Ivy來檢索所需的jar。

在線時一切都很棒。 但是，如果沒有Internet訪問，即使所需的jar文件位於本地Ivy緩存（ ~/.ivy2/cache ）中， ant resolve也會失敗。 似乎Ivy正在嘗試連接到Maven存儲庫以刷新changing="true"依賴項。

我得到的錯誤類似於以下內容：

[ivy:retrieve] You probably access the destination server through a proxy server that is not well configured.
[ivy:retrieve] You probably access the destination server through a proxy server that is not well configured.
[ivy:retrieve] 
[ivy:retrieve] :: problems summary ::
[ivy:retrieve] :::: WARNINGS
[ivy:retrieve]  Host repo.example.com not found. url=http://repo.example.com/exampleorg/examplename/examplerev/ivys/ivy.xml
[ivy:retrieve]  Host repo.example.com not found. url=http://repo.example.com/exampleorg/examplename/examplerev/jars/examplename.jar
[ivy:retrieve]          module not found: exampleorg#examplename;examplerev
[ivy:retrieve]  ==== local: tried
[ivy:retrieve]    ~/.ivy2/local/exampleorg/examplename/examplerev/ivys/ivy.xml
[ivy:retrieve]    -- artifact exampleorg#examplename;examplerev!examplename.jar:
[ivy:retrieve]    ~/.ivy2/local/exampleorg/examplename/examplerev/jars/examplename.jar
[ivy:retrieve]  ==== shared: tried
[ivy:retrieve]    ~/.ivy2/shared/exampleorg/examplename/examplerev/ivys/ivy.xml
[ivy:retrieve]    -- artifact exampleorg#examplename;examplerev!examplename.jar:
[ivy:retrieve]    ~/.ivy2/shared/exampleorg/examplename/examplerev/jars/examplename.jar
[ivy:retrieve]  ==== repo: tried
[ivy:retrieve]    http://repo.example.com/exampleorg/examplename/examplerev/ivys/ivy.xml
[ivy:retrieve]    -- artifact exampleorg#examplename;examplerev!examplename.jar:
[ivy:retrieve]    http://repo.example.com/exampleorg/examplename/examplerev/jars/examplename.jar
[ivy:retrieve]          ::::::::::::::::::::::::::::::::::::::::::::::
[ivy:retrieve]          ::          UNRESOLVED DEPENDENCIES         ::
[ivy:retrieve]          ::::::::::::::::::::::::::::::::::::::::::::::
[ivy:retrieve]          :: exampleorg#examplename;examplerev: not found
[ivy:retrieve]          ::::::::::::::::::::::::::::::::::::::::::::::
[ivy:retrieve] 
[ivy:retrieve] :: USE VERBOSE OR DEBUG MESSAGE LEVEL FOR MORE DETAILS

BUILD FAILED
~/exampleproj/build.xml:123: impossible to resolve dependencies:
        resolve failed - see output for details

按警告建議運行ant -verbose resolve在輸出中打印以下行：

[ivy:retrieve] don't use cache for exampleorg#examplename;examplerev: changing=true

如何在離線時讓Ivy從緩存中解析changing="true"依賴關系，但是在線時繼續查詢每個構建的存儲庫？

Answer 1

奧爾斯已回答了這個問題，但這並不明顯。

嘗試從命令行運行構建設置ivy.cache.ttl.default屬性：

ant -Divy.cache.ttl.default=eternal build

資料來源：

• IVY-879
• 常春藤郵件列表