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

/*
 * Copyright 2020 Fluence Labs Limited
 *
 * 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.
 */

use crate::MarineResult;

use serde_derive::Serialize;
use serde_derive::Deserialize;
use serde_with::serde_as;
use serde_with::skip_serializing_none;
use serde_with::DisplayFromStr;

use std::path::Path;

/*
An example of the config:

modules_dir = "wasm/artifacts/wasm_modules"

[[module]]
    name = "ipfs_node.wasm"
    mem_pages_count = 100
    logger_enabled = true

    [module.mounted_binaries]
    mysql = "/usr/bin/mysql"
    ipfs = "/usr/local/bin/ipfs"

    [module.wasi]
    envs = { "IPFS_ADDR" = "/dns4/relay02.fluence.dev/tcp/15001" }
    preopened_files = ["/Users/user/tmp"]
    mapped_dirs = {"tmp" = "/Users/user/tmp"}

[default]
    mem_pages_count = 100
    logger_enabled = true

    [default.mounted_binaries]
    mysql = "/usr/bin/mysql"
    ipfs = "/usr/local/bin/ipfs"

    [default.wasi]
    envs = []
    preopened_files = ["/Users/user/tmp"]
    mapped_dirs = {"tmp" = "/Users/user/tmp"}
 */

#[derive(Deserialize, Serialize, Debug, Clone, Default)]
pub struct TomlMarineConfig {
    pub modules_dir: Option<String>,
    #[serde(skip_serializing_if = "Vec::is_empty")]
    pub module: Vec<TomlMarineNamedModuleConfig>,
    pub default: Option<TomlMarineModuleConfig>,
}

impl TomlMarineConfig {
    /// Load config from filesystem.
    pub fn load<P: AsRef<Path>>(path: P) -> MarineResult<Self> {
        let file_content = std::fs::read(path)?;
        Ok(toml::from_slice(&file_content)?)
    }
}

#[derive(Deserialize, Serialize, Debug, Clone, Default)]
pub struct TomlMarineNamedModuleConfig {
    pub name: String,
    #[serde(default)]
    pub file_name: Option<String>,
    #[serde(flatten)]
    pub config: TomlMarineModuleConfig,
}

#[serde_as]
#[skip_serializing_none]
#[derive(Deserialize, Serialize, Debug, Clone, Default)]
pub struct TomlMarineModuleConfig {
    pub mem_pages_count: Option<u32>,
    #[serde_as(as = "Option<DisplayFromStr>")]
    #[serde(default)]
    pub max_heap_size: Option<bytesize::ByteSize>,
    pub logger_enabled: Option<bool>,
    pub logging_mask: Option<i32>,
    pub wasi: Option<TomlWASIConfig>,
    pub mounted_binaries: Option<toml::value::Table>,
}

#[derive(Deserialize, Serialize, Debug, Clone, Default)]
pub struct TomlWASIConfig {
    pub preopened_files: Option<Vec<String>>,
    pub envs: Option<toml::value::Table>,
    pub mapped_dirs: Option<toml::value::Table>,
}

#[cfg(test)]
mod tests {
    use bytesize::ByteSize;
    use super::{TomlMarineNamedModuleConfig, TomlMarineModuleConfig, TomlWASIConfig};

    #[test]
    fn serialize_marine_named_module_config() {
        let mut mounted_binaries = toml::value::Table::new();
        mounted_binaries.insert(
            "curl".to_string(),
            toml::Value::String("/usr/local/bin/curl".to_string()),
        );

        let config = TomlMarineNamedModuleConfig {
            name: "name".to_string(),
            file_name: Some("file_name".to_string()),
            config: TomlMarineModuleConfig {
                mem_pages_count: Some(100),
                max_heap_size: Some(ByteSize::gib(4)),
                logger_enabled: Some(false),
                logging_mask: Some(1),
                wasi: Some(TomlWASIConfig {
                    preopened_files: Some(vec!["a".to_string()]),
                    envs: None,
                    mapped_dirs: None,
                }),
                mounted_binaries: Some(mounted_binaries),
            },
        };

        assert!(toml::to_string(&config).is_ok())
    }
}