Warn user when a local git or hg resource is used

Those aren't supported and so a warning should be output. Fixes #1003

2 files changed, 28 insertions, 0 deletions

diff --git a/src/rebar_git_resource.erl b/src/rebar_git_resource.erl
index a6b4d00..c63d10d 100644
--- a/src/rebar_git_resource.erl
+++ b/src/rebar_git_resource.erl
@@ -105,18 +105,32 @@ download(Dir, {git, Url, ""}, State) ->
     download(Dir, {git, Url, {branch, "master"}}, State);
 download(Dir, {git, Url, {branch, Branch}}, _State) ->
     ok = filelib:ensure_dir(Dir),
+    maybe_warn_local_url(Url),
     git_clone(branch, git_vsn(), Url, Dir, Branch);
 download(Dir, {git, Url, {tag, Tag}}, _State) ->
     ok = filelib:ensure_dir(Dir),
+    maybe_warn_local_url(Url),
     git_clone(tag, git_vsn(), Url, Dir, Tag);
 download(Dir, {git, Url, {ref, Ref}}, _State) ->
     ok = filelib:ensure_dir(Dir),
+    maybe_warn_local_url(Url),
     git_clone(ref, git_vsn(), Url, Dir, Ref);
 download(Dir, {git, Url, Rev}, _State) ->
     ?WARN("WARNING: It is recommended to use {branch, Name}, {tag, Tag} or {ref, Ref}, otherwise updating the dep may not work as expected.", []),
     ok = filelib:ensure_dir(Dir),
+    maybe_warn_local_url(Url),
     git_clone(rev, git_vsn(), Url, Dir, Rev).
 
+maybe_warn_local_url(Url) ->
+    WarnStr = "Local git resources (~ts) are unsupported and may have odd behaviour. "
+              "Use remote git resources, or a plugin for local dependencies.",
+    case parse_git_url(Url) of
+        {error, no_scheme} -> ?WARN(WarnStr, [Url]);
+        {error, {no_default_port, _, _}} -> ?WARN(WarnStr, [Url]);
+        {error, {malformed_url, _, _}} -> ?WARN(WarnStr, [Url]);
+        _ -> ok
+    end.
+
 %% Use different git clone commands depending on git --version
 git_clone(branch,Vsn,Url,Dir,Branch) when Vsn >= {1,7,10}; Vsn =:= undefined ->
     rebar_utils:sh(?FMT("git clone ~ts ~ts -b ~ts --single-branch",
diff --git a/src/rebar_hg_resource.erl b/src/rebar_hg_resource.erl
index 42e634c..0a77c1f 100644
--- a/src/rebar_hg_resource.erl
+++ b/src/rebar_hg_resource.erl
@@ -56,6 +56,7 @@ download(Dir, {hg, Url, ""}, State) ->
     download(Dir, {hg, Url, {branch, "default"}}, State);
 download(Dir, {hg, Url, {branch, Branch}}, _State) ->
     ok = filelib:ensure_dir(Dir),
+    maybe_warn_local_url(Url),
     rebar_utils:sh(?FMT("hg clone -q -b ~ts ~ts ~ts",
                        [rebar_utils:escape_chars(Branch),
                         rebar_utils:escape_chars(Url),
@@ -63,6 +64,7 @@ download(Dir, {hg, Url, {branch, Branch}}, _State) ->
                    [{cd, filename:dirname(Dir)}]);
 download(Dir, {hg, Url, {tag, Tag}}, _State) ->
     ok = filelib:ensure_dir(Dir),
+    maybe_warn_local_url(Url),
     rebar_utils:sh(?FMT("hg clone -q -u ~ts ~ts ~ts",
                         [rebar_utils:escape_chars(Tag),
                          rebar_utils:escape_chars(Url),
@@ -70,6 +72,7 @@ download(Dir, {hg, Url, {tag, Tag}}, _State) ->
                    [{cd, filename:dirname(Dir)}]);
 download(Dir, {hg, Url, {ref, Ref}}, _State) ->
     ok = filelib:ensure_dir(Dir),
+    maybe_warn_local_url(Url),
     rebar_utils:sh(?FMT("hg clone -q -r ~ts ~ts ~ts",
                         [rebar_utils:escape_chars(Ref),
                          rebar_utils:escape_chars(Url),
@@ -77,6 +80,7 @@ download(Dir, {hg, Url, {ref, Ref}}, _State) ->
                    [{cd, filename:dirname(Dir)}]);
 download(Dir, {hg, Url, Rev}, _State) ->
     ok = filelib:ensure_dir(Dir),
+    maybe_warn_local_url(Url),
     rebar_utils:sh(?FMT("hg clone -q -r ~ts ~ts ~ts",
                         [rebar_utils:escape_chars(Rev),
                          rebar_utils:escape_chars(Url),
@@ -135,6 +139,16 @@ get_branch_ref(Dir, Branch) ->
                        [{use_stdout, false}, {debug_abort_on_error, AbortMsg}]),
     string:strip(BranchRefString, both, $\n).
 
+
+maybe_warn_local_url(Url) ->
+    try
+        _ = parse_hg_url(Url),
+        ok
+    catch
+        _:_ ->
+            ?WARN("URL format (~ts) unsupported.", [])
+    end.
+
 parse_hg_url("ssh://" ++ HostPath) ->
     [Host | Path] = string:tokens(HostPath, "/"),
     {Host, filename:rootname(filename:join(Path), ".hg")};