Question

我有两个莱宁根项目。根据{{3}}，maven应该允许我使用“LATEST”作为依赖版本。它给了我一个错误，表明无法找到版本“LATEST”的依赖项。 this question代表我如何在莱因根本地引用这个项目，如果这很重要的话。

我如何让它工作？如果这不是您在项目中引用本地依赖项的方式，我会接受其他建议。

项目文件如下所示：

(defproject mongo-model "0.0.19-SNAPSHOT"
            :description "A simple way to create model templates for mongodb for write-time data validation"
            :dependencies [[org.clojure/clojure "1.3.0"]]
            :main mongo-model.core)

和

(defproject bayou "0.1.0-SNAPSHOT"
            :description "FIXME: write this!"
            :dependencies [[org.clojure/clojure "1.3.0"]
                           [mongo-model "LATEST"]]
            :main bayou.server)

在第二个项目中运行lein deps会给我这个错误：

An error has occurred while processing the Maven artifact tasks.
 Diagnosis:

Unable to resolve artifact: Missing:
----------
1) mongo-model:mongo-model:jar:LATEST

  Try downloading the file manually from the project website.

  Then, install it using the command: 
      mvn install:install-file -DgroupId=mongo-model -DartifactId=mongo-model -Dversion=LATEST -Dpackaging=jar -Dfile=/path/to/file

  Alternatively, if you host your own repository you can deploy the file there: 
      mvn deploy:deploy-file -DgroupId=mongo-model -DartifactId=mongo-model -Dversion=LATEST -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]

  Path to dependency: 
    1) org.apache.maven:super-pom:jar:2.0
    2) mongo-model:mongo-model:jar:LATEST

----------
1 required artifact is missing.

for artifact: 
  org.apache.maven:super-pom:jar:2.0

from the specified remote repositories:
  clojars (http://clojars.org/repo/),
  central (http://repo1.maven.org/maven2)



Exception in thread "main" Unable to resolve artifact: Missing:
----------
1) mongo-model:mongo-model:jar:LATEST

  Try downloading the file manually from the project website.

  Then, install it using the command: 
      mvn install:install-file -DgroupId=mongo-model -DartifactId=mongo-model -Dversion=LATEST -Dpackaging=jar -Dfile=/path/to/file

  Alternatively, if you host your own repository you can deploy the file there: 
      mvn deploy:deploy-file -DgroupId=mongo-model -DartifactId=mongo-model -Dversion=LATEST -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]

  Path to dependency: 
    1) org.apache.maven:super-pom:jar:2.0
    2) mongo-model:mongo-model:jar:LATEST

----------
1 required artifact is missing.

for artifact: 
  org.apache.maven:super-pom:jar:2.0

from the specified remote repositories:
  clojars (http://clojars.org/repo/),
  central (http://repo1.maven.org/maven2)

 (NO_SOURCE_FILE:0)
    at clojure.lang.Compiler.eval(Compiler.java:5440)
    at clojure.lang.Compiler.eval(Compiler.java:5391)
    at clojure.core$eval.invoke(core.clj:2382)
    at clojure.main$eval_opt.invoke(main.clj:235)
    at clojure.main$initialize.invoke(main.clj:254)
    at clojure.main$script_opt.invoke(main.clj:270)
    at clojure.main$main.doInvoke(main.clj:354)
    at clojure.lang.RestFn.invoke(RestFn.java:457)
    at clojure.lang.Var.invoke(Var.java:377)
    at clojure.lang.AFn.applyToHelper(AFn.java:172)
    at clojure.lang.Var.applyTo(Var.java:482)
    at clojure.main.main(main.java:37)
Caused by: Unable to resolve artifact: Missing:
----------
1) mongo-model:mongo-model:jar:LATEST

  Try downloading the file manually from the project website.

  Then, install it using the command: 
      mvn install:install-file -DgroupId=mongo-model -DartifactId=mongo-model -Dversion=LATEST -Dpackaging=jar -Dfile=/path/to/file

  Alternatively, if you host your own repository you can deploy the file there: 
      mvn deploy:deploy-file -DgroupId=mongo-model -DartifactId=mongo-model -Dversion=LATEST -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]

  Path to dependency: 
    1) org.apache.maven:super-pom:jar:2.0
    2) mongo-model:mongo-model:jar:LATEST

----------
1 required artifact is missing.

for artifact: 
  org.apache.maven:super-pom:jar:2.0

from the specified remote repositories:
  clojars (http://clojars.org/repo/),
  central (http://repo1.maven.org/maven2)


    at org.apache.maven.artifact.ant.DependenciesTask.doExecute(DependenciesTask.java:175)
    at org.apache.maven.artifact.ant.AbstractArtifactTask.execute(AbstractArtifactTask.java:678)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:90)
    at clojure.lang.Reflector.invokeNoArgInstanceMember(Reflector.java:265)
    at leiningen.deps$do_deps.invoke(deps.clj:131)
    at leiningen.deps$deps.doInvoke(deps.clj:195)
    at clojure.lang.RestFn.invoke(RestFn.java:410)
    at clojure.lang.Var.invoke(Var.java:365)
    at clojure.lang.AFn.applyToHelper(AFn.java:161)
    at clojure.lang.Var.applyTo(Var.java:482)
    at clojure.core$apply.invoke(core.clj:542)
    at leiningen.core$apply_task.invoke(core.clj:228)
    at leiningen.core$_main.doInvoke(core.clj:294)
    at clojure.lang.RestFn.invoke(RestFn.java:410)
    at clojure.lang.AFn.applyToHelper(AFn.java:161)
    at clojure.lang.RestFn.applyTo(RestFn.java:132)
    at clojure.core$apply.invoke(core.clj:542)
    at leiningen.core$_main.invoke(core.clj:297)
    at user$eval42.invoke(NO_SOURCE_FILE:1)
    at clojure.lang.Compiler.eval(Compiler.java:5424)
    ... 11 more
Caused by: org.apache.maven.artifact.resolver.MultipleArtifactsNotFoundException: Missing:
----------
1) mongo-model:mongo-model:jar:LATEST

  Try downloading the file manually from the project website.

  Then, install it using the command: 
      mvn install:install-file -DgroupId=mongo-model -DartifactId=mongo-model -Dversion=LATEST -Dpackaging=jar -Dfile=/path/to/file

  Alternatively, if you host your own repository you can deploy the file there: 
      mvn deploy:deploy-file -DgroupId=mongo-model -DartifactId=mongo-model -Dversion=LATEST -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]

  Path to dependency: 
    1) org.apache.maven:super-pom:jar:2.0
    2) mongo-model:mongo-model:jar:LATEST

----------
1 required artifact is missing.

for artifact: 
  org.apache.maven:super-pom:jar:2.0

from the specified remote repositories:
  clojars (http://clojars.org/repo/),
  central (http://repo1.maven.org/maven2)


    at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolveTransitively(DefaultArtifactResolver.java:324)
    at org.apache.maven.artifact.ant.DependenciesTask.doExecute(DependenciesTask.java:170)
    ... 34 more

Answer 1

这里有两件事情：标准的依赖关系解析和checkouts目录的便利性。

`checkouts`目录

checkouts目录的功能非常简单：Leiningen希望在那里找到一个或多个目录，每个目录包含另一个Leiningen项目。通常，您可以在此处为其他项目创建符号链接。对于每个链接的项目，source-path，compile-path和resources-path都将添加到类路径中。（默认情况下 - 可以配置目录列表。）

这意味着链接项目的名称空间在父项目中可用，无论它们是否包含在依赖项中。您仍应将它们包含在依赖项中，以便其他人可以使用您的代码库。

依赖关系

依赖项解析机制不关心checkouts目录。它尝试在本地和远程Maven存储库中查找所有依赖项。如果您依赖于从未在存储库中安装的本地项目，则无法找到它，并且Leiningen会因为您的问题中显示的错误而挽救，即使项目链接在{{1目录。

您需要在本地存储库中至少安装一次您拥有的工件。这就像调用checkouts一样简单。每次更改后都不需要这样做，因为您始终通过lein install符号链接使用最新代码。

关于checkouts的使用：我想鼓励对依赖项使用固定版本号。这是防止一次成功构建因依赖项更改而突然中断的唯一方法。另请参阅此问题：How do I tell Maven to use the latest version of a dependency?

使用maven＆＃34; LATEST＆＃34; leiningen项目中的关键字

1 个答案:

`checkouts`目录

依赖关系

使用maven＆＃34; LATEST＆＃34; leiningen项目中的关键字

1 个答案:

checkouts目录

依赖关系

`checkouts`目录