Add script to automate publishing.

.gitignore

@@ -22,3 +22,6 @@ _TODO
 
 # The upload script, for now.
 scripts/upload-docs.sh
+
+# Backup files.
+*.bak

scripts/publish.sh

@@ -0,0 +1,30 @@
+#! /usr/bin/env bash
+set -e
+
+#
+# Publishes the current versions of core, contrib, and codegen to crates.io.
+#
+
+# Brings in: EXAMPLES_DIR, LIB_DIR, CODEGEN_DIR, CONTRIB_DIR, DOC_DIR
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+source $SCRIPT_DIR/config.sh
+
+# Ensure everything passes before trying to publish.
+echo ":::: Running test suite..."
+cargo clean
+${SCRIPT_DIR}/test.sh
+
+# Temporarily remove the dependency on codegen from core so crates.io verifies.
+sed -i.bak 's/rocket_codegen.*//' ${LIB_DIR}/Cargo.toml
+
+# Publish all the things.
+for dir in "${LIB_DIR}" "${CODEGEN_DIR}" "${CONTRIB_DIR}"; do
+  pushd ${dir}
+  echo ":::: Publishing '${dir}..."
+  # We already checked things ourselves. Don't spend time reverifying.
+  cargo publish --no-verify
+  popd
+done
+
+# Restore the original core Cargo.toml.
+mv ${LIB_DIR}/Cargo.toml.bak ${LIB_DIR}/Cargo.toml