Fetch commits from github/gitlab using Auth header

`nix flake info` calls the github 'commits' API, which requires
authorization when the repository is private. Currently this request
fails with a 404.

This commit adds an authorization header when calling the 'commits' API.
It also changes the way that the 'tarball' API authenticates, moving the
user's token from a query parameter into the Authorization header.

The query parameter method is recently deprecated and will be disallowed
in November 2020. Using them today triggers a warning email.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/nix-channel/nix-channel.cc b/src/nix-channel/nix-channel.cc
index 3ccf620c9..94d33a75c 100755
--- a/src/nix-channel/nix-channel.cc
+++ b/src/nix-channel/nix-channel.cc
@@ -87,7 +87,7 @@ static void update(const StringSet & channelNames)
         // We want to download the url to a file to see if it's a tarball while also checking if we
         // got redirected in the process, so that we can grab the various parts of a nix channel
         // definition from a consistent location if the redirect changes mid-download.
-        auto result = fetchers::downloadFile(store, url, std::string(baseNameOf(url)), false);
+        auto result = fetchers::downloadFile(store, url, Headers {}, std::string(baseNameOf(url)), false);
         auto filename = store->toRealPath(result.storePath);
         url = result.effectiveUrl;
 
@@ -112,9 +112,9 @@ static void update(const StringSet & channelNames)
         if (!unpacked) {
             // Download the channel tarball.
             try {
-                filename = store->toRealPath(fetchers::downloadFile(store, url + "/nixexprs.tar.xz", "nixexprs.tar.xz", false).storePath);
+                filename = store->toRealPath(fetchers::downloadFile(store, url + "/nixexprs.tar.xz", Headers {}, "nixexprs.tar.xz", false).storePath);
             } catch (FileTransferError & e) {
-                filename = store->toRealPath(fetchers::downloadFile(store, url + "/nixexprs.tar.bz2", "nixexprs.tar.bz2", false).storePath);
+                filename = store->toRealPath(fetchers::downloadFile(store, url + "/nixexprs.tar.bz2", Headers {}, "nixexprs.tar.bz2", false).storePath);
             }
         }