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fetchTree: Support applying patches

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You can now write

  fetchTree {
    type = "github";
    owner = "NixOS";
    repo = "nixpkgs";
    rev = "0f316e4d72daed659233817ffe52bf08e081b5de";
    patches = [ ./thunderbird-1.patch ./thunderbird-2.patch ];
  };

to apply a list of patches to a tree. These are applied lazily - the
patched tree is not materialized unless you do something that causes
the entire tree to be copied to the store (like 'src = fetchTree {
... }'). The equivalent of '-p1' is implied.

File additions/deletions/renames are not yet handled.

Issue #3920.
This commit is contained in:
Eelco Dolstra 2022-02-23 14:39:07 +01:00
parent 9075644631
commit 4b313ceb9e
6 changed files with 195 additions and 0 deletions
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15
src/libutil/util.cc
View file

@ -1564,6 +1564,21 @@ std::string stripIndentation(std::string_view s)
}
std::pair<std::string_view, std::string_view> getLine(std::string_view s)
{
auto newline = s.find('\n');
if (newline == s.npos) {
return {s, ""};
} else {
auto line = s.substr(0, newline);
if (!line.empty() && line[line.size() - 1] == '\r')
line = line.substr(0, line.size() - 1);
return {line, s.substr(newline + 1)};
}
}
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