vergen-pretty

A pretty printer for vergen generated environment variables

lib.rs:

vergen-pretty - A pretty printer for vergen environment variables

Because cargo doesn't pass compile time environment variables to dependencies, the [vergen_pretty_env] macro embeds a map of all the possible vergen environment variables with option_env!. Values not set in by your build.rs are skipped when pretty-printing the output.

Example

# use anyhow::Result;
# use std::{collections::BTreeMap, io::Write};
# use vergen_pretty::{vergen_pretty_env, PrettyBuilder};
# fn has_value(
#     tuple: (&&'static str, &Option<&'static str>),
# ) -> Option<(&'static str, &'static str)> {
#     let (key, value) = tuple;
#     if value.is_some() {
#         Some((*key, value.unwrap_or_default()))
#     } else {
#         None
#     }
# }
# fn is_empty(map: &BTreeMap<&'static str, Option<&'static str>>) -> bool {
#     map.iter().filter_map(has_value).count() == 0
# }
# fn main() -> Result<()> {
let mut stdout = vec![];
# let map = vergen_pretty_env!();
# let empty = is_empty(&map);
PrettyBuilder::default()
    .env(vergen_pretty_env!())
    .build()?
    .display(&mut stdout)?;
# if empty {
#    assert!(stdout.is_empty());
# } else {
assert!(!stdout.is_empty());
# }
#     Ok(())
# }

See the Pretty documentation for more examples

Features

vergen-pretty has two feature toggles allowing you to customize your output. No features are enabled by default.
You must specifically enable the features you wish to use.