tokmesh-core 0.1.5

Core library for tokmesh — session parsing, scanning, aggregation, pricing
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

use serde::Deserialize;
use std::path::{Path, PathBuf};

#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase")]
pub(crate) struct VariantFile {
    pub(crate) name: Option<String>,
    pub(crate) provider: Option<String>,
    pub(crate) provider_id: Option<String>,
    pub(crate) config_dir: Option<String>,
}

pub(crate) fn read_variant_file(variant_path: &Path) -> Option<VariantFile> {
    let contents = std::fs::read_to_string(variant_path).ok()?;
    serde_json::from_str(&contents).ok()
}

pub(crate) fn variant_file_path(variant_dir: &Path) -> PathBuf {
    variant_dir.join("variant.json")
}

pub(crate) fn discover_claude_project_roots(home_dir: &Path) -> Vec<PathBuf> {
    let root = home_dir.join(".cc-mirror");
    let entries = match std::fs::read_dir(root) {
        Ok(entries) => entries,
        Err(_) => return Vec::new(),
    };

    let mut roots: Vec<PathBuf> = entries
        .filter_map(|entry| entry.ok())
        .filter_map(|entry| {
            let variant_path = variant_file_path(&entry.path());
            let config_dir = config_dir_from_variant_file(&variant_path, home_dir)?;
            let projects_dir = config_dir.join("projects");
            projects_dir.is_dir().then_some(projects_dir)
        })
        .collect();
    roots.sort_unstable();
    roots
}

pub(crate) fn variant_file_for_session_path(
    path: &Path,
    home_dir: Option<&Path>,
) -> Option<PathBuf> {
    variant_dir_from_session_path(path, home_dir).map(|variant_dir| variant_file_path(&variant_dir))
}

pub(crate) fn variant_dir_from_session_path(
    path: &Path,
    home_dir: Option<&Path>,
) -> Option<PathBuf> {
    default_layout_variant_dir_from_session_path(path)
        .or_else(|| configured_variant_dir_from_session_path(path, home_dir?))
}

fn default_layout_variant_dir_from_session_path(path: &Path) -> Option<PathBuf> {
    for ancestor in path.ancestors() {
        if ancestor.file_name().and_then(|name| name.to_str()) != Some("config") {
            continue;
        }
        if !path.starts_with(ancestor.join("projects")) {
            continue;
        }
        let variant_dir = ancestor.parent()?;
        if variant_dir
            .parent()
            .and_then(|parent| parent.file_name())
            .and_then(|name| name.to_str())
            == Some(".cc-mirror")
        {
            return Some(variant_dir.to_path_buf());
        }
    }

    None
}

fn configured_variant_dir_from_session_path(path: &Path, home_dir: &Path) -> Option<PathBuf> {
    let root = home_dir.join(".cc-mirror");
    let entries = std::fs::read_dir(root).ok()?;
    let normal_claude_projects = home_dir.join(".claude").join("projects");
    let mut candidates: Vec<(usize, PathBuf)> = entries
        .filter_map(|entry| entry.ok())
        .filter_map(|entry| {
            let variant_dir = entry.path();
            if !variant_dir.is_dir() {
                return None;
            }
            let variant_path = variant_file_path(&variant_dir);
            let config_dir = config_dir_from_variant_file(&variant_path, home_dir)?;
            let projects_dir = config_dir.join("projects");

            if projects_dir == normal_claude_projects || !path.starts_with(&projects_dir) {
                return None;
            }

            Some((projects_dir.components().count(), variant_dir))
        })
        .collect();

    candidates.sort_by(|left, right| right.0.cmp(&left.0).then_with(|| left.1.cmp(&right.1)));
    candidates
        .into_iter()
        .map(|(_, variant_dir)| variant_dir)
        .next()
}

fn config_dir_from_variant_file(variant_path: &Path, home_dir: &Path) -> Option<PathBuf> {
    let variant_dir = variant_path.parent()?;
    let metadata = read_variant_file(variant_path)?;
    metadata
        .config_dir
        .as_deref()
        .and_then(|raw| expand_config_dir(raw, home_dir, variant_dir))
        .or_else(|| Some(variant_dir.join("config")))
}

fn expand_config_dir(raw: &str, home_dir: &Path, variant_dir: &Path) -> Option<PathBuf> {
    let trimmed = raw.trim();
    if trimmed.is_empty() {
        return None;
    }

    if let Some(rest) = trimmed.strip_prefix("~/") {
        return Some(home_dir.join(rest));
    }

    let path = PathBuf::from(trimmed);
    if path.is_absolute() {
        Some(path)
    } else {
        Some(variant_dir.join(path))
    }
}