click 0.4.1

A command-line REPL for Kubernetes that integrates into existing cli workflows
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

// Copyright 2017 Databricks, Inc.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at

// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.


/// Click config

use atomicwrites::{AtomicFile, AllowOverwrite};
use rustyline::config as rustyconfig;

use std::error::Error;
use std::fmt;
use std::fs::File;

use error::KubeError;

#[derive(Debug, Deserialize, Serialize)]
pub struct Alias {
    pub alias: String,
    pub expanded: String,
}

#[derive(Debug, Deserialize, Serialize)]
pub enum EditMode {
    Emacs,
    Vi,
}

impl Default for EditMode {
    fn default() -> Self { EditMode::Emacs }
}

impl fmt::Display for EditMode {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{}", match self {
            EditMode::Emacs => "Emacs",
            EditMode::Vi => "Vi",
        })
    }
}

impl Into<String> for &EditMode {
    fn into(self) -> String {
        format!("{}", self)
    }
}

#[derive(Debug, Deserialize, Serialize)]
pub enum CompletionType {
    Circular,
    List,
}

impl Default for CompletionType {
    fn default() -> Self { CompletionType::Circular }
}

impl fmt::Display for CompletionType {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{}", match self {
            CompletionType::Circular => "Circular",
            CompletionType::List => "List",
        })
    }
}

impl Into<String> for &CompletionType {
    fn into(self) -> String {
        format!("{}", self)
    }
}

#[derive(Debug, Default, Deserialize, Serialize)]
pub struct ClickConfig {
    pub namespace: Option<String>,
    pub context: Option<String>,
    pub editor: Option<String>,
    pub terminal: Option<String>,
    #[serde(default = "EditMode::default")]
    pub editmode: EditMode,
    #[serde(default = "CompletionType::default")]
    pub completiontype: CompletionType,
    #[serde(default = "Vec::new")]
    pub aliases: Vec<Alias>,
}

impl ClickConfig {
    pub fn from_file(path: &str) -> ClickConfig {
        match File::open(path) {
            Ok(f) => match serde_yaml::from_reader(f) {
                Ok(c) => c,
                Err(e) => {
                    println!("Could not read config file {:?}, using default values", e);
                    ClickConfig::default()
                }
            },
            Err(e) => {
                println!(
                    "Could not open config file at '{}': {}. Using default values",
                    path, e
                );
                ClickConfig::default()
            }
        }
    }

    pub fn get_rustyline_conf(&self) -> rustyconfig::Config {
        let mut config = rustyconfig::Builder::new();
        config = match self.editmode {
            EditMode::Emacs => config.edit_mode(rustyconfig::EditMode::Emacs),
            EditMode::Vi => config.edit_mode(rustyconfig::EditMode::Vi),
        };
        config = match self.completiontype {
            CompletionType::Circular =>
                config.completion_type(rustyconfig::CompletionType::Circular),
            CompletionType::List =>
                config.completion_type(rustyconfig::CompletionType::List),
        };
        config.build()
    }

    /// Save this config to specified path.  It's safe to call this from multiple running instances
    /// of Click, since we use an AtomicFile
    pub fn save_to_file(&self, path: &str) -> Result<(), KubeError> {
        let af = AtomicFile::new(path, AllowOverwrite);
        try!(af.write(|mut f| {
            serde_yaml::to_writer(&mut f, &self)
        }).map_err(|e| KubeError::ConfigFileError(
            format!("Failed to write config file: {}", e.description())
        )));
        Ok(())
    }
}