regent-sdk 0.7.0

Multi-paradigm configuration management system as a library
Documentation 
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

use crate::command::CommandResult;
use crate::error::RegentError;
use crate::hosts::handlers::HostHandler;
use crate::hosts::handlers::final_command;
use crate::hosts::privilege::Credentials;
use crate::hosts::privilege::Privilege;
use crate::secrets::SecretProvider;

use serde::{Deserialize, Serialize};
use std::path::PathBuf;
use std::process::Command;

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct LocalHostHandler {
    pub user: WhichUser,
}

impl LocalHostHandler {
    pub fn from(user: WhichUser) -> Self {
        Self { user }
    }
}

impl HostHandler for LocalHostHandler {
    fn connect(
        &mut self,
        _endpoint: &str,
        // _secret_provider: &Option<SecretProvider>,
    ) -> Result<(), RegentError> {
        Ok(())
    }

    fn is_connected(&mut self) -> bool {
        true
    }

    fn disconnect(&mut self) -> Result<(), RegentError> {
        Ok(())
    }

    fn is_this_command_available(
        &mut self,
        command: &str,
        _privilege: &Privilege,
    ) -> Result<bool, RegentError> {
        // TODO : use privilege (some commands do no exist for every user (PATH and so on...))
        let check_cmd_result = Command::new("sh")
            .arg("-c")
            .arg(format!("command -v {}", command))
            .output();

        match check_cmd_result {
            Ok(cmd_result) => {
                match cmd_result.status.code() {
                    Some(code) => {
                        if code == 0 {
                            return Ok(true);
                        } else {
                            return Ok(false);
                        }
                    }
                    None => {
                        // Process terminated by a signal -> consider this as a failure to run the command to completion
                        Err(RegentError::FailureToRunCommand(format!(
                            "Process terminated by a signal : {:?}",
                            cmd_result
                        )))
                    }
                }
            }
            Err(e) => {
                return Err(RegentError::FailureToRunCommand(format!("{:?}", e)));
            }
        }
    }

    fn run_command(
        &mut self,
        command: &str,
        privilege: &Privilege,
    ) -> Result<CommandResult, RegentError> {
        let final_command = final_command(command, privilege, &self.user);

        let result = Command::new("sh").arg("-c").arg(final_command).output();

        match result {
            Ok(output) => {
                match output.status.code() {
                    Some(code) => Ok(CommandResult {
                        return_code: code,
                        stdout: String::from_utf8_lossy(&output.stdout).to_string(),
                        stderr: String::from_utf8_lossy(&output.stderr).to_string(),
                    }),
                    None => {
                        // Process terminated by a signal -> consider this as a failure to run the command to completion
                        Err(RegentError::FailureToRunCommand(format!(
                            "Process terminated by a signal : {:?}",
                            output
                        )))
                    }
                }
            }
            Err(e) => Err(RegentError::FailureToRunCommand(format!("{}", e))),
        }
    }

    fn run_windows_command(&mut self, command: &str) -> Result<CommandResult, RegentError> {
        match Command::new("cmd").args(&["/C", command]).output() {
            Ok(output) => match output.status.code() {
                Some(code) => Ok(CommandResult {
                    return_code: code,
                    stdout: String::from_utf8_lossy(&output.stdout).to_string(),
                    stderr: String::from_utf8_lossy(&output.stderr).to_string(),
                }),
                None => {
                    // Process terminated by a signal -> consider this as a failure to run the command to completion
                    Err(RegentError::FailureToRunCommand(format!(
                        "Process terminated by a signal : {:?}",
                        output
                    )))
                }
            },
            Err(e) => Err(RegentError::FailureToRunCommand(format!("{}", e))),
        }
    }

    fn get_file(&mut self, path: PathBuf) -> Result<Vec<u8>, RegentError> {
        if !self.is_connected() {
            return Err(RegentError::FailedInitialization(
                "Not connected to host".to_string(),
            ));
        }

        match std::fs::read(path) {
            Ok(file_content) => Ok(file_content),
            Err(details) => {
                return Err(RegentError::FailureToRunCommand(format!("{:?}", details)));
            }
        }
    }
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum WhichUser {
    CurrentUser,
    UsernamePassword(Credentials),
}