1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153

use crate::config::{last_modified, read, Conf, Status};
use indexmap::IndexMap;
use nu_protocol::Value;
use nu_source::Tag;
use std::any::Any;
use std::fmt::Debug;
use std::path::PathBuf;

#[derive(Debug, Clone, Default)]
pub struct NuConfig {
    pub source_file: Option<std::path::PathBuf>,
    pub vars: IndexMap<String, Value>,
    pub modified_at: Status,
}

impl Conf for NuConfig {
    fn as_any(&self) -> &dyn Any {
        self
    }

    fn is_modified(&self) -> Result<bool, Box<dyn std::error::Error>> {
        self.is_modified()
    }

    fn var(&self, key: &str) -> Option<Value> {
        self.var(key)
    }

    fn env(&self) -> Option<Value> {
        self.env()
    }

    fn path(&self) -> Option<Value> {
        self.path()
    }

    fn reload(&mut self) {
        let vars = &mut self.vars;

        if let Ok(variables) = read(Tag::unknown(), &self.source_file) {
            vars.extend(variables);

            self.modified_at = if let Ok(status) = last_modified(&None) {
                status
            } else {
                Status::Unavailable
            };
        }
    }

    fn clone_box(&self) -> Box<dyn Conf> {
        Box::new(self.clone())
    }
}

impl NuConfig {
    pub fn with(config_file: Option<std::ffi::OsString>) -> NuConfig {
        match &config_file {
            None => NuConfig::new(),
            Some(_) => {
                let source_file = config_file.map(std::path::PathBuf::from);

                let vars = if let Ok(variables) = read(Tag::unknown(), &source_file) {
                    variables
                } else {
                    IndexMap::default()
                };

                NuConfig {
                    source_file: source_file.clone(),
                    vars,
                    modified_at: NuConfig::get_last_modified(&source_file),
                }
            }
        }
    }

    pub fn new() -> NuConfig {
        let vars = if let Ok(variables) = read(Tag::unknown(), &None) {
            variables
        } else {
            IndexMap::default()
        };

        NuConfig {
            source_file: None,
            vars,
            modified_at: NuConfig::get_last_modified(&None),
        }
    }

    pub fn history_path(&self) -> PathBuf {
        super::path::history(self)
    }

    pub fn get_last_modified(config_file: &Option<std::path::PathBuf>) -> Status {
        if let Ok(status) = last_modified(config_file) {
            status
        } else {
            Status::Unavailable
        }
    }

    pub fn is_modified(&self) -> Result<bool, Box<dyn std::error::Error>> {
        let modified_at = &self.modified_at;

        Ok(
            match (NuConfig::get_last_modified(&self.source_file), modified_at) {
                (Status::LastModified(left), Status::LastModified(right)) => {
                    let left = left.duration_since(std::time::UNIX_EPOCH)?;
                    let right = (*right).duration_since(std::time::UNIX_EPOCH)?;

                    left != right
                }
                (_, _) => false,
            },
        )
    }

    pub fn var(&self, key: &str) -> Option<Value> {
        let vars = &self.vars;

        if let Some(value) = vars.get(key) {
            return Some(value.clone());
        }

        None
    }

    pub fn env(&self) -> Option<Value> {
        let vars = &self.vars;

        if let Some(env_vars) = vars.get("env") {
            return Some(env_vars.clone());
        }

        None
    }

    pub fn path(&self) -> Option<Value> {
        let vars = &self.vars;

        if let Some(env_vars) = vars.get("path") {
            return Some(env_vars.clone());
        }

        if let Some(env_vars) = vars.get("PATH") {
            return Some(env_vars.clone());
        }

        None
    }
}