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configuration precedence

The order that decides which setting wins when a file, an environment variable, and a flag disagree.

A common convention: built-in defaults, then a config file, then environment variables, then command-line flags, each overriding the one before.

Examples

  • With top = 5 in the config file and TALLY_TOP=7 set, running tally -n 3 notes.txt uses 3: the flag beats the variable, which beats the file.

See also

environment variable standard input Cargo.toml
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