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do not handle load-file op by interpolating file contents into Compil…

…er/load expression, fixes NREPL-34
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1 parent 1b684d8 commit 77cb7d2347b0a78094ea32d7757aa3e3662fc634 @cemerick cemerick committed Oct 12, 2012
Showing with 19 additions and 3 deletions.
  1. +19 −3 src/main/clojure/clojure/tools/nrepl/middleware/load_file.clj
@@ -3,15 +3,31 @@
(:require [ :as eval])
(:use [ :as middleware :only (set-descriptor!)]))
+; need to hold file contents "out of band" so as to avoid JVM method
+; size limitations (cannot eval an expression larger than some size
+; [64k?]), so the naive approach of just interpolating file contents
+; into an expression to be evaluated doesn't work
+; see
+; and
+(def ^{:private true
+ :doc "An atom that temporarily holds the contents of files to
+be loaded."} file-contents (atom {}))
(defn ^{:dynamic true} load-file-code
"Given the contents of a file, its _source-path-relative_ path,
and its filename, returns a string of code (or seq of expressions)
that, when evaluated, will load those contents with appropriate
filename references and line numbers in metadata, etc."
[file file-path file-name]
- (apply format
- "(clojure.lang.Compiler/load ( %s) %s %s)"
- (map pr-str [file file-path file-name])))
+ (let [file-key [file-path (gensym)]]
+ (swap! file-contents assoc file-key file)
+ (pr-str `(try
+ (clojure.lang.Compiler/load
+ ( (@@(var file-contents) '~file-key))
+ ~file-path
+ ~file-name)
+ (finally
+ (swap! @(var file-contents) dissoc '~file-key))))))
(defn wrap-load-file
"Middleware that evaluates a file's contents, as per load-file,

5 comments on commit 77cb7d2

Why @@(var... and not just @(...?


cemerick replied Oct 12, 2012

That's looking up the contents of the file to be loaded; @@(var file-contents) returns a map, @(var file-contents) returns the atom.

No, I meant, why use the @@(var file-contents) and not just @file-contents ?


cemerick replied Oct 12, 2012

Oh, because file-contents is private.

Oh indeed, (blush)

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