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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174

use nu_errors::ShellError;
use nu_protocol::{did_you_mean, ColumnPath, Primitive, ShellTypeName, UntaggedValue, Value};
use nu_source::{span_for_spanned_list, HasSpan, SpannedItem, Tagged};
use nu_value_ext::{get_data_by_column_path, ValueExt};

#[derive(Debug, Eq, PartialEq)]
pub enum Action {
    SemVerAction(SemVerAction),
    Default,
}

#[derive(Debug, Eq, PartialEq)]
pub enum SemVerAction {
    Major,
    Minor,
    Patch,
}

#[derive(Default)]
pub struct Inc {
    pub field: Option<Tagged<ColumnPath>>,
    pub error: Option<String>,
    pub action: Option<Action>,
}

impl Inc {
    pub fn new() -> Self {
        Default::default()
    }

    fn apply(&self, input: &str) -> UntaggedValue {
        match &self.action {
            Some(Action::SemVerAction(act_on)) => {
                let mut ver = match semver::Version::parse(input) {
                    Ok(parsed_ver) => parsed_ver,
                    Err(_) => return UntaggedValue::string(input.to_string()),
                };

                match act_on {
                    SemVerAction::Major => ver.increment_major(),
                    SemVerAction::Minor => ver.increment_minor(),
                    SemVerAction::Patch => ver.increment_patch(),
                }

                UntaggedValue::string(ver.to_string())
            }
            Some(Action::Default) | None => match input.parse::<u64>() {
                Ok(v) => UntaggedValue::string((v + 1).to_string()),
                Err(_) => UntaggedValue::string(input),
            },
        }
    }

    pub fn for_semver(&mut self, part: SemVerAction) {
        if self.permit() {
            self.action = Some(Action::SemVerAction(part));
        } else {
            self.log_error("can only apply one");
        }
    }

    fn permit(&mut self) -> bool {
        self.action.is_none()
    }

    fn log_error(&mut self, message: &str) {
        self.error = Some(message.to_string());
    }

    pub fn usage() -> &'static str {
        "Usage: inc field [--major|--minor|--patch]"
    }

    pub fn inc(&self, value: Value) -> Result<Value, ShellError> {
        match &value.value {
            UntaggedValue::Primitive(Primitive::Int(i)) => {
                Ok(UntaggedValue::int(i + 1).into_value(value.tag()))
            }
            UntaggedValue::Primitive(Primitive::Filesize(b)) => {
                Ok(UntaggedValue::filesize(b + 1_u64).into_value(value.tag()))
            }
            UntaggedValue::Primitive(Primitive::String(ref s)) => {
                Ok(self.apply(s).into_value(value.tag()))
            }
            UntaggedValue::Table(values) => {
                if values.len() == 1 {
                    Ok(UntaggedValue::Table(vec![self.inc(values[0].clone())?])
                        .into_value(value.tag()))
                } else {
                    Err(ShellError::type_error(
                        "incrementable value",
                        value.type_name().spanned(value.span()),
                    ))
                }
            }

            UntaggedValue::Row(_) => match self.field {
                Some(ref f) => {
                    let fields = f.clone();

                    let replace_for = get_data_by_column_path(
                        &value,
                        f,
                        move |obj_source, column_path_tried, _| match did_you_mean(
                            obj_source,
                            column_path_tried.as_string(),
                        ) {
                            Some(suggestions) => ShellError::labeled_error(
                                "Unknown column",
                                format!("did you mean '{}'?", suggestions[0]),
                                span_for_spanned_list(fields.iter().map(|p| p.span)),
                            ),
                            None => ShellError::labeled_error(
                                "Unknown column",
                                "row does not contain this column",
                                span_for_spanned_list(fields.iter().map(|p| p.span)),
                            ),
                        },
                    );

                    let got = replace_for?;
                    let replacement = self.inc(got)?;

                    value
                        .replace_data_at_column_path(f, replacement.value.into_untagged_value())
                        .ok_or_else(|| {
                            ShellError::labeled_error(
                                "inc could not find field to replace",
                                "column name",
                                value.tag(),
                            )
                        })
                }
                None => Err(ShellError::untagged_runtime_error(
                    "inc needs a field when incrementing a column in a table",
                )),
            },
            _ => Err(ShellError::type_error(
                "incrementable value",
                value.type_name().spanned(value.span()),
            )),
        }
    }
}

#[cfg(test)]
mod tests {
    mod semver {
        use crate::inc::SemVerAction;
        use crate::Inc;
        use nu_test_support::value::string;

        #[test]
        fn major() {
            let mut inc = Inc::new();
            inc.for_semver(SemVerAction::Major);
            assert_eq!(inc.apply("0.1.3"), string("1.0.0").value);
        }

        #[test]
        fn minor() {
            let mut inc = Inc::new();
            inc.for_semver(SemVerAction::Minor);
            assert_eq!(inc.apply("0.1.3"), string("0.2.0").value);
        }

        #[test]
        fn patch() {
            let mut inc = Inc::new();
            inc.for_semver(SemVerAction::Patch);
            assert_eq!(inc.apply("0.1.3"), string("0.1.4").value);
        }
    }
}