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How is this different from GNU envsubst (in the gettext package)?
by bashinator 11y ago
How is this different from GNU envsubst (in the gettext package)?
- nextrevision 11y agoenvsubst will really just perform variable substitution, not perform any logic or command substitution (e.g. $(hostname -f)). It's also limited, from what I've seen, in support for other bash variable actions (such as defaults). You can also write loops with output similar to other templating languages here as well.
- pdkl95 11y agoTraditionally, this would be a job for m4: $ cat examples/config.yaml.in user: USERNAME password: ifelse(PASSWORD,`PASSWORD',`defaultpass',PASSWORD) files: patsubst(esyscmd(`ls'), `.+$', ` - \&') $ m4 -DUSERNAME=somebody examples/config.yaml.in user: somebody password: defaultpass files: - README.m4 - examples - sempl