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in Rails 4.0, you could use `/dev/stdin` on both Linux and Mac, but with the switch to Kernel.load in Rails 4.1, this broke on Linux (you get a LoadError). Instead, explicitly detect `-` as meaning stdin, then read from stdin explicitly, instead of performing file gymnastics. This should now work on any platform uniformly. Passing a script via stdin is useful when you're sshing to a server, and the script you want to run is stored locally. You could theoretically pass the entire script on the command line, but in reality you'll run into problems with the command being too long. |
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