fetchbzr, fetchdarcs, fetchhg: use `rev` attr

This makes it match the behaviour of fetchgit and fetchsvn, so it's
easier to write scripts that support all of them.

2 files changed, 4 insertions, 4 deletions

diff --git a/pkgs/build-support/fetchhg/builder.sh b/pkgs/build-support/fetchhg/builder.sh
index 9699fb69b7f..0b51ef79b23 100644
--- a/pkgs/build-support/fetchhg/builder.sh
+++ b/pkgs/build-support/fetchhg/builder.sh
@@ -1,9 +1,9 @@
 source $stdenv/setup
-header "getting $url${tag:+ ($tag)} into $out"
+header "getting $url${rev:+ ($rev)} into $out"
 
 hg clone --insecure "$url" hg-clone
 
-hg archive -q -y ${tag:+-r "$tag"} --cwd hg-clone $out
+hg archive -q -y ${rev:+-r "$rev"} --cwd hg-clone $out
 rm -f $out/.hg_archival.txt
 
 stopNest
diff --git a/pkgs/build-support/fetchhg/default.nix b/pkgs/build-support/fetchhg/default.nix
index 1aebb7ecc87..4675cbe6ec8 100644
--- a/pkgs/build-support/fetchhg/default.nix
+++ b/pkgs/build-support/fetchhg/default.nix
@@ -1,4 +1,4 @@
-{stdenv, mercurial, nix}: {name ? null, url, tag ? null, md5 ? null, sha256 ? null}:
+{stdenv, mercurial, nix}: {name ? null, url, rev ? null, md5 ? null, sha256 ? null}:
 
 # TODO: statically check if mercurial as the https support if the url starts woth https.
 stdenv.mkDerivation {
@@ -13,6 +13,6 @@ stdenv.mkDerivation {
   outputHashMode = "recursive";
   outputHash = if md5 != null then md5 else sha256;
   
-  inherit url tag;
+  inherit url rev;
   preferLocalBuild = true;
 }