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annotate rust/hg-core/src/config/plain_info.rs @ 52037:3ae7c43ad8aa

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rust: add `Progress` trait for progress bars This will be used in the next few changes to introduce a progress bar for the `hg update` fastpath.
author Rapha?l Gom?s <rgomes@octobus.net>
date Mon, 30 Sep 2024 16:02:30 +0200
parents 467d9df98c68
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
49513
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1 use crate::utils::files::get_bytes_from_os_string;
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2 use std::env;
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3
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4 /// Keeps information on whether plain mode is active.
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5 ///
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6 /// Plain mode means that all configuration variables which affect
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7 /// the behavior and output of Mercurial should be
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8 /// ignored. Additionally, the output should be stable,
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9 /// reproducible and suitable for use in scripts or applications.
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10 ///
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11 /// The only way to trigger plain mode is by setting either the
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12 /// `HGPLAIN' or `HGPLAINEXCEPT' environment variables.
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13 ///
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14 /// The return value can either be
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15 /// - False if HGPLAIN is not set, or feature is in HGPLAINEXCEPT
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16 /// - False if feature is disabled by default and not included in HGPLAIN
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17 /// - True otherwise
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18 #[derive(Clone)]
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19 pub struct PlainInfo {
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20 is_plain: bool,
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21 except: Vec<Vec<u8>>,
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22 }
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23
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24 impl PlainInfo {
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25 fn plain_except(except: Vec<Vec<u8>>) -> Self {
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26 PlainInfo {
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27 is_plain: true,
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28 except,
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29 }
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30 }
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31
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32 pub fn empty() -> PlainInfo {
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33 PlainInfo {
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34 is_plain: false,
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35 except: vec![],
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36 }
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37 }
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38
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39 pub fn from_env() -> PlainInfo {
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40 if let Some(except) = env::var_os("HGPLAINEXCEPT") {
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41 PlainInfo::plain_except(
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42 get_bytes_from_os_string(except)
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43 .split(|&byte| byte == b',')
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44 .map(|x| x.to_vec())
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45 .collect(),
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46 )
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47 } else {
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48 PlainInfo {
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49 is_plain: env::var_os("HGPLAIN").is_some(),
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50 except: vec![],
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51 }
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52 }
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53 }
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54
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55 pub fn is_feature_plain(&self, feature: &str) -> bool {
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56 return self.is_plain
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57 && !self
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58 .except
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59 .iter()
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60 .any(|exception| exception.as_slice() == feature.as_bytes());
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61 }
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62
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63 pub fn is_plain(&self) -> bool {
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64 self.is_plain
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65 }
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66
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67 pub fn plainalias(&self) -> bool {
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68 self.is_feature_plain("alias")
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69 }
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70 pub fn plainrevsetalias(&self) -> bool {
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71 self.is_feature_plain("revsetalias")
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72 }
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73 pub fn plaintemplatealias(&self) -> bool {
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74 self.is_feature_plain("templatealias")
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75 }
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76 pub fn plaintweakdefaults(&self) -> bool {
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77 self.is_feature_plain("tweakdefaults")
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78 }
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79 }