On Jan 16, 2009, at 8:37 AM, Stephen C. Gilardi wrote:
I like this. I've also seen several requests for a way to know when code is running in a script which could be satisfied by this as well.
For clarity, here's what I'm proposing based on recent discussion in this thread:
[1] When clojure.main runs a script, it will set *command-line-script* to the script name as it appears on the command line.
Example:java -cp clojure.jar clojure.main -i dir-utils.clj list- dir.clj :verbose :depth 3
will run with these values set:
*command-line-script* "list-dir.clj"
*command-line-args* (":verbose" ":depth" "3")
Note that dir-utils.clj is an "init file" here (there can be any
number of them, each introduced by a "-i"), while list-dir.clj is the
main script.
[2] When clojure.lang.Script runs a script, the name immediately before either the end of line or the "--" will be the script name. Here's the equivalent to above:
java -cp clojure.jar clojure.lang.Script dir-utils.clj list-dir.clj -- :verbose :depth 3
(same values set):
*command-line-script* "list-dir.clj"
*command-line-args* (":verbose" ":depth" "3")
Note that in this case, files are still loaded in order, but "init"
files are not "marked". list-dir.clj is considered the main script
because it's the last to appear before the "--" which marks the
beginning of args.
[3] *command-line-script* will be nil in other cases: when clojure.main launches a repl, when using clojure.lang.Repl, or when clojure.main reads a script from *in*.
Comments welcome. --Steve
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