#![allow(clippy::disallowed_methods, reason = "This is only used in xtasks")]use std::{    fmt::{self, Debug},    ops::Not,    process::Command,    str::FromStr,    sync::LazyLock,}; use anyhow::{Context, Result, anyhow};use derive_more::{Deref, DerefMut, FromStr}; use itertools::Itertools;use regex::Regex;use semver::Version;use serde::Deserialize; pub trait Subcommand {    type ParsedOutput: FromStr<Err = anyhow::Error>;     fn args(&self) -> impl IntoIterator<Item = String>;} #[derive(Deref, DerefMut)]pub struct GitCommand<G: Subcommand> {    #[deref]    #[deref_mut]    subcommand: G,} impl<G: Subcommand> GitCommand<G> {    #[must_use]    pub fn run(subcommand: G) -> Result<G::ParsedOutput> {        Self { subcommand }.run_impl()    }     fn run_impl(self) -> Result<G::ParsedOutput> {        let command_output = Command::new("git")            .args(self.subcommand.args())            .output()            .context("Failed to spawn command")?;         if command_output.status.success() {            String::from_utf8(command_output.stdout)                .map_err(|_| anyhow!("Invalid UTF8"))                .and_then(|s| {                    G::ParsedOutput::from_str(s.trim())                        .map_err(|e| anyhow!("Failed to parse from string: {e:?}"))                })        } else {            anyhow::bail!(                "Command failed with exit code {}, stderr: {}",                command_output.status.code().unwrap_or_default(),                String::from_utf8(command_output.stderr).unwrap_or_default()            )        }    }} #[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]pub enum ReleaseChannel {    Stable,    Preview,} impl ReleaseChannel {    pub(crate) fn tag_suffix(&self) -> &'static str {        match self {            ReleaseChannel::Stable => "",            ReleaseChannel::Preview => "-pre",        }    }} #[derive(Debug, Clone)]pub struct VersionTag(Version, ReleaseChannel); impl VersionTag {    pub fn parse(input: &str) -> Result<Self, anyhow::Error> {        // Being a bit more lenient for human inputs        let version = input.strip_prefix('v').unwrap_or(input);         let (version_str, channel) = version            .strip_suffix("-pre")            .map_or((version, ReleaseChannel::Stable), |version_str| {                (version_str, ReleaseChannel::Preview)            });         Version::parse(version_str)            .map(|version| Self(version, channel))            .map_err(|_| anyhow::anyhow!("Failed to parse version from tag!"))    }     pub fn version(&self) -> &Version {        &self.0    }} impl ToString for VersionTag {    fn to_string(&self) -> String {        format!(            "v{version}{channel_suffix}",            version = self.0,            channel_suffix = self.1.tag_suffix()        )    }} #[derive(Debug, Deref, FromStr, PartialEq, Eq, Hash, Deserialize)]pub struct CommitSha(pub(crate) String); impl CommitSha {    pub fn new(sha: String) -> Self {        Self(sha)    }     pub fn short(&self) -> &str {        self.0.as_str().split_at(8).0    }} #[derive(Debug)]pub struct CommitDetails {    sha: CommitSha,    author: Committer,    title: String,    body: String,} #[derive(Debug, Clone, PartialEq, Eq)]pub struct Committer {    name: String,    email: String,} impl Committer {    pub fn new(name: &str, email: &str) -> Self {        Self {            name: name.to_owned(),            email: email.to_owned(),        }    }} impl fmt::Display for Committer {    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {        write!(formatter, "{} ({})", self.name, self.email)    }} impl CommitDetails {    const BODY_DELIMITER: &str = "|body-delimiter|";    const COMMIT_DELIMITER: &str = "|commit-delimiter|";    const FIELD_DELIMITER: &str = "|field-delimiter|";    const FORMAT_STRING: &str = "%H|field-delimiter|%an|field-delimiter|%ae|field-delimiter|%s|body-delimiter|%b|commit-delimiter|";     fn parse(line: &str, body: &str) -> Result<Self, anyhow::Error> {        let Some([sha, author_name, author_email, title]) =            line.splitn(4, Self::FIELD_DELIMITER).collect_array()        else {            return Err(anyhow!("Failed to parse commit fields from input {line}"));        };         Ok(CommitDetails {            sha: CommitSha(sha.to_owned()),            author: Committer::new(author_name, author_email),            title: title.to_owned(),            body: body.to_owned(),        })    }     pub fn pr_number(&self) -> Option<u64> {        // Since we use squash merge, all commit titles end with the '(#12345)' pattern.        // While we could strictly speaking index into this directly, go for a slightly        // less prone approach to errors        const PATTERN: &str = " (#";        self.title            .rfind(PATTERN)            .and_then(|location| {                self.title[location..]                    .find(')')                    .map(|relative_end| location + PATTERN.len()..location + relative_end)            })            .and_then(|range| self.title[range].parse().ok())    }     pub(crate) fn co_authors(&self) -> Option<Vec<Committer>> {        static CO_AUTHOR_REGEX: LazyLock<Regex> =            LazyLock::new(|| Regex::new(r"Co-authored-by: (.+) <(.+)>").unwrap());         let mut co_authors = Vec::new();         for cap in CO_AUTHOR_REGEX.captures_iter(&self.body.as_ref()) {            let Some((name, email)) = cap                .get(1)                .map(|m| m.as_str())                .zip(cap.get(2).map(|m| m.as_str()))            else {                continue;            };            co_authors.push(Committer::new(name, email));        }         co_authors.is_empty().not().then_some(co_authors)    }     pub(crate) fn author(&self) -> &Committer {        &self.author    }     pub(crate) fn title(&self) -> &str {        &self.title    }     pub(crate) fn sha(&self) -> &CommitSha {        &self.sha    }} #[derive(Debug, Deref, Default, DerefMut)]pub struct CommitList(Vec<CommitDetails>); impl CommitList {    pub fn range(&self) -> Option<String> {        self.0            .first()            .zip(self.0.last())            .map(|(first, last)| format!("{}..{}", last.sha().0, first.sha().0))    }} impl IntoIterator for CommitList {    type IntoIter = std::vec::IntoIter<CommitDetails>;    type Item = CommitDetails;     fn into_iter(self) -> std::vec::IntoIter<Self::Item> {        self.0.into_iter()    }} impl FromStr for CommitList {    type Err = anyhow::Error;     fn from_str(input: &str) -> Result<Self, Self::Err> {        Ok(CommitList(            input                .split(CommitDetails::COMMIT_DELIMITER)                .filter(|commit_details| !commit_details.is_empty())                .map(|commit_details| {                    let (line, body) = commit_details                        .trim()                        .split_once(CommitDetails::BODY_DELIMITER)                        .expect("Missing body delimiter");                    CommitDetails::parse(line, body)                        .expect("Parsing from the output should succeed")                })                .collect(),        ))    }} pub struct GetVersionTags; impl Subcommand for GetVersionTags {    type ParsedOutput = VersionTagList;     fn args(&self) -> impl IntoIterator<Item = String> {        ["tag", "-l", "v*"].map(ToOwned::to_owned)    }} pub struct VersionTagList(Vec<VersionTag>); impl VersionTagList {    pub fn sorted(mut self) -> Self {        self.0.sort_by(|a, b| a.version().cmp(b.version()));        self    }     pub fn find_previous_minor_version(&self, version_tag: &VersionTag) -> Option<&VersionTag> {        self.0            .iter()            .take_while(|tag| tag.version() < version_tag.version())            .collect_vec()            .into_iter()            .rev()            .find(|tag| {                (tag.version().major < version_tag.version().major                    || (tag.version().major == version_tag.version().major                        && tag.version().minor < version_tag.version().minor))                    && tag.version().patch == 0            })    }} impl FromStr for VersionTagList {    type Err = anyhow::Error;     fn from_str(s: &str) -> Result<Self, Self::Err> {        let version_tags = s.lines().flat_map(VersionTag::parse).collect_vec();         version_tags            .is_empty()            .not()            .then_some(Self(version_tags))            .ok_or_else(|| anyhow::anyhow!("No version tags found"))    }} pub struct CommitsFromVersionToVersion {    version_tag: VersionTag,    branch: String,} impl CommitsFromVersionToVersion {    pub fn new(version_tag: VersionTag, branch: String) -> Self {        Self {            version_tag,            branch,        }    }} impl Subcommand for CommitsFromVersionToVersion {    type ParsedOutput = CommitList;     fn args(&self) -> impl IntoIterator<Item = String> {        [            "log".to_string(),            format!("--pretty=format:{}", CommitDetails::FORMAT_STRING),            format!(                "{version}..{branch}",                version = self.version_tag.to_string(),                branch = self.branch            ),        ]    }} pub struct NoOutput; impl FromStr for NoOutput {    type Err = anyhow::Error;     fn from_str(_: &str) -> Result<Self, Self::Err> {        Ok(NoOutput)    }} #[cfg(test)]mod tests {    use super::*;    use indoc::indoc;     #[test]    fn parse_stable_version_tag() {        let tag = VersionTag::parse("v0.172.8").unwrap();        assert_eq!(tag.version().major, 0);        assert_eq!(tag.version().minor, 172);        assert_eq!(tag.version().patch, 8);        assert_eq!(tag.1, ReleaseChannel::Stable);    }     #[test]    fn parse_preview_version_tag() {        let tag = VersionTag::parse("v0.172.1-pre").unwrap();        assert_eq!(tag.version().major, 0);        assert_eq!(tag.version().minor, 172);        assert_eq!(tag.version().patch, 1);        assert_eq!(tag.1, ReleaseChannel::Preview);    }     #[test]    fn parse_version_tag_without_v_prefix() {        let tag = VersionTag::parse("0.172.8").unwrap();        assert_eq!(tag.version().major, 0);        assert_eq!(tag.version().minor, 172);        assert_eq!(tag.version().patch, 8);    }     #[test]    fn parse_invalid_version_tag() {        let result = VersionTag::parse("vConradTest");        assert!(result.is_err());    }     #[test]    fn version_tag_stable_roundtrip() {        let tag = VersionTag::parse("v0.172.8").unwrap();        assert_eq!(tag.to_string(), "v0.172.8");    }     #[test]    fn version_tag_preview_roundtrip() {        let tag = VersionTag::parse("v0.172.1-pre").unwrap();        assert_eq!(tag.to_string(), "v0.172.1-pre");    }     #[test]    fn sorted_orders_by_semver() {        let input = indoc! {"            v0.172.8            v0.170.1            v0.171.4            v0.170.2            v0.172.11            v0.171.3            v0.172.9        "};        let list = VersionTagList::from_str(input).unwrap().sorted();        for window in list.0.windows(2) {            assert!(                window[0].version() <= window[1].version(),                "{} should come before {}",                window[0].to_string(),                window[1].to_string()            );        }        assert_eq!(list.0[0].to_string(), "v0.170.1");        assert_eq!(list.0[list.0.len() - 1].to_string(), "v0.172.11");    }     #[test]    fn find_previous_minor_for_173_returns_172() {        let input = indoc! {"            v0.170.1            v0.170.2            v0.171.3            v0.171.4            v0.172.0            v0.172.8            v0.172.9            v0.172.11        "};        let list = VersionTagList::from_str(input).unwrap().sorted();        let target = VersionTag::parse("v0.173.0").unwrap();        let previous = list.find_previous_minor_version(&target).unwrap();        assert_eq!(previous.version().major, 0);        assert_eq!(previous.version().minor, 172);        assert_eq!(previous.version().patch, 0);    }     #[test]    fn find_previous_minor_skips_same_minor() {        let input = indoc! {"            v0.172.8            v0.172.9            v0.172.11        "};        let list = VersionTagList::from_str(input).unwrap().sorted();        let target = VersionTag::parse("v0.172.8").unwrap();        assert!(list.find_previous_minor_version(&target).is_none());    }     #[test]    fn find_previous_minor_with_major_version_gap() {        let input = indoc! {"            v0.172.0            v0.172.9            v0.172.11        "};        let list = VersionTagList::from_str(input).unwrap().sorted();        let target = VersionTag::parse("v1.0.0").unwrap();        let previous = list.find_previous_minor_version(&target).unwrap();        assert_eq!(previous.to_string(), "v0.172.0");    }     #[test]    fn find_previous_minor_requires_zero_patch_version() {        let input = indoc! {"            v0.172.1            v0.172.9            v0.172.11        "};        let list = VersionTagList::from_str(input).unwrap().sorted();        let target = VersionTag::parse("v1.0.0").unwrap();        assert!(list.find_previous_minor_version(&target).is_none());    }     #[test]    fn parse_tag_list_from_real_tags() {        let input = indoc! {"            v0.9999-temporary            vConradTest            v0.172.8        "};        let list = VersionTagList::from_str(input).unwrap();        assert_eq!(list.0.len(), 1);        assert_eq!(list.0[0].to_string(), "v0.172.8");    }     #[test]    fn parse_empty_tag_list_fails() {        let result = VersionTagList::from_str("");        assert!(result.is_err());    }     #[test]    fn pr_number_from_squash_merge_title() {        let line = format!(

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