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%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
%% ex: ts=4 sw=4 et
-module(rebar_git_resource).
-behaviour(rebar_resource).
-export([lock/2
,download/3
,needs_update/2
,make_vsn/1]).
-include("rebar.hrl").
%% Regex used for parsing scp style remote url
-define(SCP_PATTERN, "\\A(?<username>[^@]+)@(?<host>[^:]+):(?<path>.+)\\z").
lock(AppDir, {git, Url, _}) ->
lock(AppDir, {git, Url});
lock(AppDir, {git, Url}) ->
AbortMsg = lists:flatten(io_lib:format("Locking of git dependency failed in ~ts", [AppDir])),
Dir = rebar_utils:escape_double_quotes(AppDir),
{ok, VsnString} =
case os:type() of
{win32, _} ->
rebar_utils:sh("git --git-dir=\"" ++ Dir ++ "/.git\" --work-tree=\"" ++ Dir ++ "\" rev-parse --verify HEAD",
[{use_stdout, false}, {debug_abort_on_error, AbortMsg}]);
_ ->
rebar_utils:sh("git --git-dir=\"" ++ Dir ++ "/.git\" rev-parse --verify HEAD",
[{use_stdout, false}, {debug_abort_on_error, AbortMsg}])
end,
Ref = rebar_string:trim(VsnString, both, "\n"),
{git, Url, {ref, Ref}}.
%% Return true if either the git url or tag/branch/ref is not the same as the currently
%% checked out git repo for the dep
needs_update(Dir, {git, Url, {tag, Tag}}) ->
{ok, Current} = rebar_utils:sh(?FMT("git describe --tags --exact-match", []),
[{cd, Dir}]),
Current1 = rebar_string:trim(rebar_string:trim(Current, both, "\n"),
both, "\r"),
?DEBUG("Comparing git tag ~ts with ~ts", [Tag, Current1]),
not ((Current1 =:= Tag) andalso compare_url(Dir, Url));
needs_update(Dir, {git, Url, {branch, Branch}}) ->
%% Fetch remote so we can check if the branch has changed
SafeBranch = rebar_utils:escape_chars(Branch),
{ok, _} = rebar_utils:sh(?FMT("git fetch origin ~ts", [SafeBranch]),
[{cd, Dir}]),
%% Check for new commits to origin/Branch
{ok, Current} = rebar_utils:sh(?FMT("git log HEAD..origin/~ts --oneline", [SafeBranch]),
[{cd, Dir}]),
?DEBUG("Checking git branch ~ts for updates", [Branch]),
not ((Current =:= []) andalso compare_url(Dir, Url));
needs_update(Dir, {git, Url, "master"}) ->
needs_update(Dir, {git, Url, {branch, "master"}});
needs_update(Dir, {git, _, Ref}) ->
{ok, Current} = rebar_utils:sh(?FMT("git rev-parse --short=7 -q HEAD", []),
[{cd, Dir}]),
Current1 = rebar_string:trim(rebar_string:trim(Current, both, "\n"),
both, "\r"),
Ref2 = case Ref of
{ref, Ref1} ->
Length = length(Current1),
case Length >= 7 of
true -> lists:sublist(Ref1, Length);
false -> Ref1
end;
_ ->
Ref
end,
?DEBUG("Comparing git ref ~ts with ~ts", [Ref2, Current1]),
(Current1 =/= Ref2).
compare_url(Dir, Url) ->
{ok, CurrentUrl} = rebar_utils:sh(?FMT("git config --get remote.origin.url", []),
[{cd, Dir}]),
CurrentUrl1 = rebar_string:trim(rebar_string:trim(CurrentUrl, both, "\n"),
both, "\r"),
{ok, ParsedUrl} = parse_git_url(Url),
{ok, ParsedCurrentUrl} = parse_git_url(CurrentUrl1),
?DEBUG("Comparing git url ~p with ~p", [ParsedUrl, ParsedCurrentUrl]),
ParsedCurrentUrl =:= ParsedUrl.
parse_git_url(Url) ->
%% Checks for standard scp style git remote
case re:run(Url, ?SCP_PATTERN, [{capture, [host, path], list}, unicode]) of
{match, [Host, Path]} ->
{ok, {Host, filename:rootname(Path, ".git")}};
nomatch ->
parse_git_url(not_scp, Url)
end.
parse_git_url(not_scp, Url) ->
UriOpts = [{scheme_defaults, [{git, 9418} | http_uri:scheme_defaults()]}],
case http_uri:parse(Url, UriOpts) of
{ok, {_Scheme, _User, Host, _Port, Path, _Query}} ->
{ok, {Host, filename:rootname(Path, ".git")}};
{error, Reason} ->
{error, Reason}
end.
download(Dir, {git, Url}, State) ->
?WARN("WARNING: It is recommended to use {branch, Name}, {tag, Tag} or {ref, Ref}, otherwise updating the dep may not work as expected.", []),
download(Dir, {git, Url, {branch, "master"}}, State);
download(Dir, {git, Url, ""}, State) ->
?WARN("WARNING: It is recommended to use {branch, Name}, {tag, Tag} or {ref, Ref}, otherwise updating the dep may not work as expected.", []),
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",
[rebar_utils:escape_chars(Url),
rebar_utils:escape_chars(filename:basename(Dir)),
rebar_utils:escape_chars(Branch)]),
[{cd, filename:dirname(Dir)}]);
git_clone(branch,_Vsn,Url,Dir,Branch) ->
rebar_utils:sh(?FMT("git clone ~ts ~ts -b ~ts",
[rebar_utils:escape_chars(Url),
rebar_utils:escape_chars(filename:basename(Dir)),
rebar_utils:escape_chars(Branch)]),
[{cd, filename:dirname(Dir)}]);
git_clone(tag,Vsn,Url,Dir,Tag) when Vsn >= {1,7,10}; Vsn =:= undefined ->
rebar_utils:sh(?FMT("git clone ~ts ~ts -b ~ts --single-branch",
[rebar_utils:escape_chars(Url),
rebar_utils:escape_chars(filename:basename(Dir)),
rebar_utils:escape_chars(Tag)]),
[{cd, filename:dirname(Dir)}]);
git_clone(tag,_Vsn,Url,Dir,Tag) ->
rebar_utils:sh(?FMT("git clone ~ts ~ts -b ~ts",
[rebar_utils:escape_chars(Url),
rebar_utils:escape_chars(filename:basename(Dir)),
rebar_utils:escape_chars(Tag)]),
[{cd, filename:dirname(Dir)}]);
git_clone(ref,_Vsn,Url,Dir,Ref) ->
rebar_utils:sh(?FMT("git clone -n ~ts ~ts",
[rebar_utils:escape_chars(Url),
rebar_utils:escape_chars(filename:basename(Dir))]),
[{cd, filename:dirname(Dir)}]),
rebar_utils:sh(?FMT("git checkout -q ~ts", [Ref]), [{cd, Dir}]);
git_clone(rev,_Vsn,Url,Dir,Rev) ->
rebar_utils:sh(?FMT("git clone -n ~ts ~ts",
[rebar_utils:escape_chars(Url),
rebar_utils:escape_chars(filename:basename(Dir))]),
[{cd, filename:dirname(Dir)}]),
rebar_utils:sh(?FMT("git checkout -q ~ts", [rebar_utils:escape_chars(Rev)]),
[{cd, Dir}]).
git_vsn() ->
case application:get_env(rebar, git_vsn) of
{ok, Vsn} -> Vsn;
undefined ->
Vsn = git_vsn_fetch(),
application:set_env(rebar, git_vsn, Vsn),
Vsn
end.
git_vsn_fetch() ->
case rebar_utils:sh("git --version",[]) of
{ok, VsnStr} ->
case re:run(VsnStr, "git version\\h+(\\d)\\.(\\d)\\.(\\d).*", [{capture,[1,2,3],list}, unicode]) of
{match,[Maj,Min,Patch]} ->
{list_to_integer(Maj),
list_to_integer(Min),
list_to_integer(Patch)};
nomatch ->
undefined
end;
{error, _} ->
undefined
end.
make_vsn(Dir) ->
case collect_default_refcount(Dir) of
Vsn={plain, _} ->
Vsn;
{Vsn, RawRef, RawCount} ->
{plain, build_vsn_string(Vsn, RawRef, RawCount)}
end.
%% Internal functions
collect_default_refcount(Dir) ->
%% Get the tag timestamp and minimal ref from the system. The
%% timestamp is really important from an ordering perspective.
case rebar_utils:sh("git log -n 1 --pretty=format:\"%h\n\" ",
[{use_stdout, false},
return_on_error,
{cd, Dir}]) of
{error, _} ->
?WARN("Getting log of git dependency failed in ~ts. Falling back to version 0.0.0", [rebar_dir:get_cwd()]),
{plain, "0.0.0"};
{ok, String} ->
RawRef = rebar_string:trim(String, both, "\n"),
{Tag, TagVsn} = parse_tags(Dir),
{ok, RawCount} =
case Tag of
undefined ->
AbortMsg2 = "Getting rev-list of git depedency failed in " ++ Dir,
{ok, PatchLines} = rebar_utils:sh("git rev-list HEAD",
[{use_stdout, false},
{cd, Dir},
{debug_abort_on_error, AbortMsg2}]),
rebar_utils:line_count(PatchLines);
_ ->
get_patch_count(Dir, Tag)
end,
{TagVsn, RawRef, RawCount}
end.
build_vsn_string(Vsn, RawRef, Count) ->
%% Cleanup the tag and the Ref information. Basically leading 'v's and
%% whitespace needs to go away.
RefTag = [".ref", re:replace(RawRef, "\\s", "", [global, unicode])],
%% Create the valid [semver](http://semver.org) version from the tag
case Count of
0 ->
rebar_utils:to_list(Vsn);
_ ->
rebar_utils:to_list([Vsn, "+build.", integer_to_list(Count), RefTag])
end.
get_patch_count(Dir, RawRef) ->
AbortMsg = "Getting rev-list of git dep failed in " ++ Dir,
Ref = re:replace(RawRef, "\\s", "", [global, unicode]),
Cmd = io_lib:format("git rev-list ~ts..HEAD",
[rebar_utils:escape_chars(Ref)]),
{ok, PatchLines} = rebar_utils:sh(Cmd,
[{use_stdout, false},
{cd, Dir},
{debug_abort_on_error, AbortMsg}]),
rebar_utils:line_count(PatchLines).
parse_tags(Dir) ->
%% Don't abort on error, we want the bad return to be turned into 0.0.0
case rebar_utils:sh("git -c color.ui=false log --oneline --no-walk --tags --decorate",
[{use_stdout, false}, return_on_error, {cd, Dir}]) of
{error, _} ->
{undefined, "0.0.0"};
{ok, Line} ->
case re:run(Line, "(\\(|\\s)(HEAD[^,]*,\\s)tag:\\s(v?([^,\\)]+))", [{capture, [3, 4], list}, unicode]) of
{match,[Tag, Vsn]} ->
{Tag, Vsn};
nomatch ->
case rebar_utils:sh("git describe --tags --abbrev=0",
[{use_stdout, false}, return_on_error, {cd, Dir}]) of
{error, _} ->
{undefined, "0.0.0"};
%% strip the v prefix if it exists like is done in the above match
{ok, [$v | LatestVsn]} ->
{undefined, rebar_string:trim(LatestVsn, both, "\n")};
{ok, LatestVsn} ->
{undefined, rebar_string:trim(LatestVsn,both, "\n")}
end
end
end.