Phil Hagelberg
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4 changed files with 51 additions and 29 deletions
4
NEWS.md
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NEWS.md
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@ -1,5 +1,9 @@
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# Leiningen News -- history of user-visible changes
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## ??? / ???
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* Add project coordinate data to jar metadata. (Conor McDermottroe)
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## 2.8.1 / 2017-10-27
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* Fix a bug where `lein help` couldn't list built-in tasks on Java 9. (Phil Hagelberg)
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18
doc/FAQ.md
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doc/FAQ.md
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@ -252,10 +252,10 @@ bug with the dependency which does this.
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**A:** You probably downloaded `lein`/`lein.bat` from the [master branch](https://github.com/technomancy/leiningen/tree/master/bin). Unless you plan to build leiningen yourself or help develop it, we suggest you use the latest stable version: [lein](https://raw.githubusercontent.com/technomancy/leiningen/stable/bin/lein)/[lein.bat](https://raw.githubusercontent.com/technomancy/leiningen/stable/bin/lein.bat)
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**Q:** I have a dependency whose group ID and/or artifact ID starts with a
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number (which is invalid for symbols in Clojure). How can I add it to my
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project's dependencies?
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number (which is invalid for symbols in Clojure). How can I add it to my
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project's dependencies?
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**A:** As of version 2.8.0, Leiningen supports string dependency names like
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this:
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this:
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```clj
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:dependencies [["net.3scale/3scale-api" "3.0.2"]]
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@ -266,3 +266,15 @@ Prior to version 2.8.0, this is the workaround:
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```clj
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:dependencies [[~(symbol "net.3scale" "3scale-api") "3.0.2"]]
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```
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**Q:** I'm getting warnings for implicit hooks or implicit middleware.
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**A:** Hooks are a deprecated feature where plugins can modify the
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behavior of built-in Leiningen functionality; they result in
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situations which can be very difficult to debug and usually point
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to situations in which the original API is not flexible enough.
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Leiningen also has a deprecated feature for implicitly loading
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middleware. Middleware is not deprecated but should now be declared using
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`:middleware` instead of being auto-detected from plugins.
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Adding `:implicits false` to `project.clj` will disable all implicit features.
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@ -377,11 +377,6 @@ before manually specified hooks.
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### Project Middleware
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**Note**: Leiningen supports project middleware in plugins;
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however this mechanism is extremely error-prone and difficult to
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debug. It should be considered deprecated as of 2.8.0 onward and will
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continue to work until version 3.0 but is strongly advised against.
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Project middleware is just a function that is called on a project map
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returning a new project map. Middleware gives a plugin the power to do
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any kind of transformation on the project map. However, problems with
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@ -394,7 +389,7 @@ The following middleware injects additional javac options into the project map,
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but only if there are any java source paths in the project:
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```clj
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(ns lein-inject.plugin
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(ns leiningen.inject
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(:require [leiningen.core.project :as p]))
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(def javac-params-profile
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@ -406,12 +401,12 @@ but only if there are any java source paths in the project:
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project))
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```
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Projects use middleware by adding `:middleware` as a vector of var
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names into their `project.clj`:
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Like hooks, middleware will be applied automatically for plugins if you put it
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in `plugin-name.plugin/middleware`. You can also load middleware manually by
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setting the `:middleware` key in project.clj to a seq of vars to call to
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transform your project map. Note that automatic middleware is applied before
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manually specified middleware.
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```clj
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:middleware [leiningen.inject/middleware]
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```
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Also note that the currently active middleware depends on which
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profiles are active. This means we need to reapply the middleware
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@ -429,6 +424,12 @@ middleware to inject values into the project map is if the profiles has to be
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programmatically computed, or if you have to modify the project map in a way
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that is not possible with `merge-profiles`.
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**Note**: Leiningen supports loading middleware implicitly when the
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middleware is named `plugin-name.plugin/middleware`; however this
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mechanism is even more difficult to debug than regular middleware. It
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should be considered deprecated as of 2.8.0 onward and will continue
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to work until version 3.0 but is strongly advised against.
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### Maven Wagons
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[Pomegranate](https://github.com/cemerick/pomegranate) (the library
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@ -29,7 +29,9 @@
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(defn- warn [& args]
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;; TODO: remove with 3.0.0
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(require 'leiningen.core.main)
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((resolve 'leiningen.core.main/warn) args))
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(apply (resolve 'leiningen.core.main/warn) args))
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(def ^:private warn-once (memoize warn))
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(defn- update-each-contained [m keys f & args]
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(reduce (fn [m k]
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@ -389,9 +391,9 @@
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(meta project))))
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([project]
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(let [repos (if (:omit-default-repositories project)
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(do (warn "WARNING:"
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":omit-default-repositories is deprecated;"
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"use :repositories ^:replace [...] instead.")
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(do (warn-once "WARNING:"
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":omit-default-repositories is deprecated;"
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"use :repositories ^:replace [...] instead.")
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empty-repositories)
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default-repositories)]
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(setup-map-defaults
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@ -675,18 +677,14 @@
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profiles)]
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(when (and (seq repo-profiles)
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(not (System/getenv "LEIN_SUPPRESS_USER_LEVEL_REPO_WARNINGS")))
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(warn ":repositories detected in user-level profiles!"
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(vec (map first repo-profiles)) "\nSee"
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"https://github.com/technomancy/leiningen/wiki/Repeatability"))))
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(alter-var-root #'warn-user-repos memoize)
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(warn-once ":repositories detected in user-level profiles!"
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(vec (map first repo-profiles)) "\nSee"
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"https://github.com/technomancy/leiningen/wiki/Repeatability"))))
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(defn- warn-user-profile [root profiles]
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(when (and root (contains? profiles :user))
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(warn "WARNING: user-level profile defined in project files.")))
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(alter-var-root #'warn-user-profile memoize)
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(defn- system-profiles []
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(let [sys-profile-dir (if (= :windows (utils/get-os))
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(io/file (System/getenv "AllUsersProfile") "Leiningen")
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@ -772,11 +770,14 @@
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(defn- load-hook [hook-name]
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(if-let [hook (try (utils/require-resolve hook-name)
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(catch Throwable e
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(catch Exception e
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(utils/error "problem requiring" hook-name "hook")
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(throw e)))]
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(try (hook)
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(catch Throwable e
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(try (warn-once "Warning: implicit hook found:" hook-name
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"\nHooks are deprecated and will be removed"
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"in a future version.")
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(hook)
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(catch Exception e
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(utils/error "problem activating" hook-name "hook")
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(throw e)))
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(when-not (:optional (meta hook-name))
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@ -799,7 +800,11 @@
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([project middleware-name]
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(if (and (:implicits project true) (:implicit-middleware project true))
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(if-let [middleware (utils/require-resolve middleware-name)]
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(middleware project)
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(do (when-not (some #{middleware-name} (:middleware project))
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(warn-once "Warning: implicit middleware found:" middleware-name
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"\nPlease declare all middleware in :middleware"
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"as implicit loading is deprecated."))
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(middleware project))
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(do (when-not (:optional (meta middleware-name))
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(utils/error "cannot resolve" middleware-name "middleware"))
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project))
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