mirror of
https://github.com/NixOS/nix
synced 2024-09-19 23:03:53 -04:00
e68676e6c8
Since a26be9f3b8, the same parser is used
to parse the result of sourcehut’s `HEAD` endpoint (coming from [git
dumb protocol]) and the output of `git ls-remote`. However, they are very
slightly different (the former doesn’t specify the current reference
since it’s implied to be `HEAD`).
Unify both, and make the parser a bit more robust and understandable (by
making it more typed and adding tests for it)
[git dumb protocol]: https://git-scm.com/book/en/v2/Git-Internals-Transfer-Protocols#_the_dumb_protocol
26 lines
690 B
C++
26 lines
690 B
C++
#include "git.hh"
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#include <regex>
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namespace nix {
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namespace git {
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std::optional<LsRemoteRefLine> parseLsRemoteLine(std::string_view line)
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{
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const static std::regex line_regex("^(ref: *)?([^\\s]+)(?:\\t+(.*))?$");
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std::match_results<std::string_view::const_iterator> match;
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if (!std::regex_match(line.cbegin(), line.cend(), match, line_regex))
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return std::nullopt;
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return LsRemoteRefLine {
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.kind = match[1].length() == 0
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? LsRemoteRefLine::Kind::Object
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: LsRemoteRefLine::Kind::Symbolic,
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.target = match[2],
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.reference = match[3].length() == 0 ? std::nullopt : std::optional<std::string>{ match[3] }
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};
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}
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}
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}
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