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6706b15fbc
fish_add_path can be used either interactively, in the commandline, or in config.fish. That's its greatest strength, it's a very DWIM-style command. One of the compromises that entails, however, is that it can't really be very loud about what it does. If it skips a path, it can't write a warning because it might be used in config.fish. But it *can* if it's used interactively. So we try to detect that case and enable verbose mode automatically. That means if you do ```fish fish_add_path /opt/mytool/bin/mytool ``` it may tell you "Skipping path because it is a file instead of a directory:". The check isn't perfect, it goes through status current-command and isatty, but it should be good for most cases (and be false in config.fish).