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Improve ref validity checking in fetchGit

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The previous regex was too strict and did not match what git was allowing. It
could lead to `fetchGit` not accepting valid branch names, even though they
exist in a repository (for example, branch names containing `/`, which are
pretty standard, like `release/1.0` branches).

The new regex defines what a branch name should **NOT** contain. It takes the
definitions from `refs.c` in https://github.com/git/git and `git help
check-ref-format` pages.

This change also introduces a test for ref name validity checking, which
compares the result from Nix with the result of `git check-ref-format --branch`.
This commit is contained in:
Nikola Knezevic 2020-05-30 12:29:35 +02:00
parent f60ce4fa20
commit 77007d4eab
5 changed files with 120 additions and 1 deletions
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1
src/libutil/url.cc
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@ -4,6 +4,7 @@
namespace nix {
std::regex refRegex(refRegexS, std::regex::ECMAScript);
std::regex badGitRefRegex(badGitRefRegexS, std::regex::ECMAScript);
std::regex revRegex(revRegexS, std::regex::ECMAScript);
std::regex flakeIdRegex(flakeIdRegexS, std::regex::ECMAScript);