diff options
Diffstat (limited to 'src/libfetchers/fetchers.hh')
| -rw-r--r-- | src/libfetchers/fetchers.hh | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/libfetchers/fetchers.hh b/src/libfetchers/fetchers.hh index e8ae59143..a72cfafa4 100644 --- a/src/libfetchers/fetchers.hh +++ b/src/libfetchers/fetchers.hh @@ -21,6 +21,14 @@ struct Tree struct InputScheme; +/* The Input object is generated by a specific fetcher, based on the + * user-supplied input attribute in the flake.nix file, and contains + * the information that the specific fetcher needs to perform the + * actual fetch. The Input object is most commonly created via the + * "fromURL()" or "fromAttrs()" static functions which are provided + * the url or attrset specified in the flake file. + */ + struct Input { friend struct InputScheme; @@ -84,6 +92,16 @@ public: std::optional<time_t> getLastModified() const; }; + +/* The InputScheme represents a type of fetcher. Each fetcher + * registers with nix at startup time. When processing an input for a + * flake, each scheme is given an opportunity to "recognize" that + * input from the url or attributes in the flake file's specification + * and return an Input object to represent the input if it is + * recognized. The Input object contains the information the fetcher + * needs to actually perform the "fetch()" when called. + */ + struct InputScheme { virtual ~InputScheme() |