pray-core 1.12.0

Core library for Prayfile, the package manager for the language placed before inference
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

use crate::lockfile::Lockfile;
use crate::paths::validate_destination_path;
use crate::render::RenderedTarget;
use crate::render_file::{
    create_regular_bytes, destination_kind, open_regular, read_destination_bytes,
    read_regular_bytes, symlink_error, DestinationKind,
};
use crate::render_path_guard::ensure_safe_destination_ancestors;
use crate::resolve::ResolvedProject;
use crate::{PrayError, PrayResult};
use std::fs;
use std::io::{Seek, Write};
use std::path::Path;

fn layout_rendered_content(path: &Path, display: &str, rendered: &str) -> PrayResult<String> {
    match destination_kind(path)? {
        DestinationKind::Missing => Ok(rendered.to_string()),
        DestinationKind::Regular => {
            let bytes = read_regular_bytes(path, display)?;
            let existing =
                String::from_utf8(bytes).map_err(|error| PrayError::Render(error.to_string()))?;
            Ok(crate::render_patch::patch_rendered_content(
                &existing, rendered,
            ))
        }
        DestinationKind::Symlink => Err(symlink_error(display)),
        DestinationKind::Other => Err(PrayError::Render(format!(
            "refusing to write `{display}`; destination is not a regular file"
        ))),
    }
}

fn write_rendered_content(path: &Path, display: &str, rendered: &str) -> PrayResult<()> {
    match destination_kind(path)? {
        DestinationKind::Missing => create_regular_bytes(path, display, rendered.as_bytes()),
        DestinationKind::Regular => {
            let mut file = open_regular(path, display, true)?;
            let existing = String::from_utf8(read_destination_bytes(&mut file, display)?)
                .map_err(|error| PrayError::Render(error.to_string()))?;
            let content = crate::render_patch::patch_rendered_content(&existing, rendered);
            if crate::transaction::replace(
                path,
                Some(existing.as_bytes()),
                Some(content.as_bytes()),
            )? {
                return Ok(());
            }
            file.rewind()?;
            file.set_len(0)?;
            file.write_all(content.as_bytes())?;
            Ok(())
        }
        DestinationKind::Symlink => Err(symlink_error(display)),
        DestinationKind::Other => Err(PrayError::Render(format!(
            "refusing to write `{display}`; destination is not a regular file"
        ))),
    }
}

pub fn layout_rendered_targets(
    project: &ResolvedProject,
    rendered: &[RenderedTarget],
) -> PrayResult<Vec<RenderedTarget>> {
    let mut laid_out = Vec::with_capacity(rendered.len());
    for target in rendered {
        let relative = validate_destination_path(&target.path.to_string_lossy())?;
        ensure_safe_destination_ancestors(
            &project.project_root,
            relative.as_path(),
            relative.as_str(),
        )?;
        let path = relative.join_root(&project.project_root);
        let content = layout_rendered_content(&path, relative.as_str(), &target.content)?;
        let managed_spans =
            crate::render_relocate::relocate_managed_spans(&content, &target.managed_spans);
        laid_out.push(RenderedTarget {
            path: target.path.clone(),
            content,
            managed_spans,
        });
    }
    Ok(laid_out)
}

pub fn write_rendered_targets(
    project: &ResolvedProject,
    rendered: &[RenderedTarget],
) -> PrayResult<()> {
    write_rendered_targets_with_previous_lockfile(project, rendered, None)
}

pub fn write_rendered_targets_with_previous_lockfile(
    project: &ResolvedProject,
    rendered: &[RenderedTarget],
    previous_lockfile: Option<&Lockfile>,
) -> PrayResult<()> {
    crate::transaction::run(&project.project_root, || {
        write_project_files(project, rendered, previous_lockfile)
    })
}

fn write_project_files(
    project: &ResolvedProject,
    rendered: &[RenderedTarget],
    previous_lockfile: Option<&Lockfile>,
) -> PrayResult<()> {
    crate::render_dest::provisioned_destination_statuses(project, previous_lockfile)?;
    if project.manifest.render.conflict == "fail" {
        if let Some(lockfile) = previous_lockfile {
            crate::render_conflict::reject_managed_span_conflicts(&project.project_root, lockfile)?;
        }
    }
    for target in rendered {
        let relative = validate_destination_path(&target.path.to_string_lossy())?;
        ensure_safe_destination_ancestors(
            &project.project_root,
            relative.as_path(),
            relative.as_str(),
        )?;
        let path = relative.join_root(&project.project_root);
        if let Some(parent) = path.parent() {
            fs::create_dir_all(parent)?;
        }
        ensure_safe_destination_ancestors(
            &project.project_root,
            relative.as_path(),
            relative.as_str(),
        )?;
        write_rendered_content(&path, relative.as_str(), &target.content)?;
    }
    crate::render::materialize_provisioned_exports(project, previous_lockfile)?;
    Ok(())
}