task_diff 0.2.1

Create Terraform AWS Container Definition diffs
Documentation 
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use std::fmt;

pub struct Line {
    pub diff: char,
    pub depth: usize,
    pub contents: String,
}

impl fmt::Display for Line {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        let diff = match self.diff {
            '.' => "".to_owned(),
            _ => format!("{} ", self.diff),
        };
        write!(f, "{}{}{}", " ".repeat(self.depth * 2), diff, self.contents)
    }
}

impl Line {
    pub fn new(diff: char, contents: String) -> Line {
        Line {
            diff,
            depth: 0,
            contents,
        }
    }
}

pub enum WrapperKind {
    Array,
    Object,
}

pub fn wrap(lines: Vec<Line>, name: &str, kind: WrapperKind) -> Vec<Line> {
    let (d1, d2) = match kind {
        WrapperKind::Array => ('[', ']'),
        WrapperKind::Object => ('{', '}'),
    };
    let mut result: Vec<Line> = vec![];
    if !lines.is_empty() {
        result.push(Line::new('.', format!("{}{}", name, d1)));
        for mut line in lines {
            line.depth += 1;
            result.push(line);
        }
        result.push(Line::new('.', format!("{}", d2)));
    }
    result
}