gitu 0.41.0

A git client inspired by Magit
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

use crate::gitu_diff::FileDiff;
use std::ops::Range;

#[derive(Debug, Clone)]
pub(crate) struct Diff {
    pub text: String,
    pub diff_type: DiffType,
    pub file_diffs: Vec<FileDiff>,
}

#[derive(Debug, Clone)]
pub(crate) enum DiffType {
    WorkdirToIndex, // i.e. Unstaged
    IndexToTree,    // i.e. Staged
    TreeToTree,
}

#[derive(Debug)]
pub(crate) enum PatchMode {
    Normal,
    Reverse,
}

impl Diff {
    pub(crate) fn mask_old_hunk(&self, file_i: usize, hunk_i: usize) -> String {
        let content = &self.text[self.file_diffs[file_i].hunks[hunk_i].content.range.clone()];
        mask_hunk_content(content, '-', '+')
    }

    pub(crate) fn mask_new_hunk(&self, file_i: usize, hunk_i: usize) -> String {
        let content = &self.text[self.file_diffs[file_i].hunks[hunk_i].content.range.clone()];
        mask_hunk_content(content, '+', '-')
    }

    pub(crate) fn format_file_patch(&self, file_i: usize) -> String {
        let mut patch = String::new();
        patch.push_str(self.file_diff_header(file_i));
        for hunk in &self.file_diffs[file_i].hunks {
            patch.push_str(&self.text[hunk.range.clone()]);
        }
        patch
    }

    pub(crate) fn format_hunk_patch(&self, file_i: usize, hunk_i: usize) -> String {
        let mut patch = String::new();
        patch.push_str(self.file_diff_header(file_i));
        patch.push_str(self.hunk(file_i, hunk_i));
        patch
    }

    pub(crate) fn file_diff_header(&self, file_i: usize) -> &str {
        &self.text[self.file_diffs[file_i].header.range.clone()]
    }

    pub(crate) fn hunk(&self, file_i: usize, hunk_i: usize) -> &str {
        &self.text[self.file_diffs[file_i].hunks[hunk_i].range.clone()]
    }

    pub(crate) fn hunk_content(&self, file_index: usize, hunk_index: usize) -> &str {
        &self.text[self.file_diffs[file_index].hunks[hunk_index]
            .content
            .range
            .clone()]
    }

    pub(crate) fn format_line_patch(
        &self,
        file_i: usize,
        hunk_i: usize,
        line_range: Range<usize>,
        mode: PatchMode,
    ) -> String {
        let hunk = &self.file_diffs[file_i].hunks[hunk_i];
        let file_header = &self.text[self.file_diffs[file_i].header.range.clone()];
        let hunk_header = &self.text[hunk.header.range.clone()];
        let hunk_content = &self.text[hunk.content.range.clone()];

        let modified_content = hunk_content
            .split_inclusive('\n')
            .enumerate()
            .filter_map(|(i, line)| {
                let add = match mode {
                    PatchMode::Normal => '+',
                    PatchMode::Reverse => '-',
                };

                let remove = match mode {
                    PatchMode::Normal => '-',
                    PatchMode::Reverse => '+',
                };

                if line_range.contains(&i) {
                    Some(line.to_string())
                } else if line.starts_with(add) {
                    None
                } else if let Some(stripped) = line.strip_prefix(remove) {
                    Some(format!(" {stripped}"))
                } else {
                    Some(line.to_string())
                }
            })
            .collect::<String>();

        format!("{file_header}{hunk_header}{modified_content}")
    }

    pub(crate) fn file_line_of_first_diff(&self, file_i: usize, hunk_i: usize) -> usize {
        let hunk = &self.file_diffs[file_i].hunks[hunk_i];
        let line = hunk.header.new_line_start as usize;

        let hunk_content = &self.text[hunk.content.range.clone()];
        for (i, content_line) in hunk_content.lines().enumerate() {
            if content_line.starts_with('+') || content_line.starts_with('-') {
                return line + i;
            }
        }
        line
    }
}

fn mask_hunk_content(content: &str, keep: char, mask: char) -> String {
    let mut result = String::new();

    content.split_inclusive('\n').for_each(|line| {
        if line.starts_with(mask) {
            if line.ends_with("\r\n") {
                for _ in 0..(line.len() - 2) {
                    result.push(' ');
                }
                result.push_str("\r\n");
            } else if line.ends_with('\n') {
                for _ in 0..(line.len() - 1) {
                    result.push(' ');
                }
                result.push('\n');
            }
        } else if line.starts_with(keep) {
            result.push(' ');
            result.push_str(&line[1..]);
        } else if !line.starts_with('\\') {
            result.push_str(line);
        }
    });

    result
}