reload-aot-error.sh

#!/bin/sh

# reload-aot-error.sh

# This file demonstrates the problems that result from
# unloading-and-reloading Clojure namespaces whose source files are
# newer than their AOT-compiled .class files.

# To run the demonstration, copy this script and clojure.jar into an
# empty directory, then execute the script.

# When it fails, the exception will be:
#     Exception in thread "main"
#     java.lang.Exception: 
#     namespace 'project.alpha' not found after loading '/project/alpha'

# Failure behavior by version:
#     FAILS    on Clojure 1.0.0
#     succeeds on Clojure 1.1.0
#     FAILS    on Clojure 1.2.0
#     FAILS    on Clojure 1.3.0-alpha1
#     FAILS    on Clojure 1.3.0-SNAPSHOT commit 167a73857a746e8dbeeb6d9ea8f99083aca7dc69

cd `dirname $0`

if [ ! -e clojure.jar ]; then
    echo "Must have clojure.jar in this directory."
    exit 1
fi

rm -rf classes src
mkdir -p src/project classes

cat > src/project/alpha.clj <<EOF
(ns project.alpha)
EOF

cat > src/project/beta.clj <<EOF
(ns project.beta (:use project.alpha))
EOF

cat > src/project/delta.clj <<EOF
(ns project.delta (:use project.beta))

(remove-ns (quote project.alpha))
(require (quote project.beta) :reload-all)
EOF

JAVA="java -cp src:classes:clojure.jar -Dclojure.compile.path=classes"

# If you comment out this line (don't AOT-compile), it works:
$JAVA clojure.lang.Compile project.beta

# If you comment out this line (don't modify source), it works:
touch src/project/beta.clj

# But if both lines are left uncommented, this fails:
$JAVA clojure.main src/project/delta.clj