wip: Troubleshoot rebar3 compile failure

./install.sh fails due to rebar3 compile failure:

$ KERL_INSTALL_DOCSH=yes KERL_BUILD_BACKEND=git ./kerl install git-19.3.6 ~/apps/erlang/git-19.3.6
Installing Erlang/OTP 19.3.6 (git-19.3.6) in /home/erszcz/apps/erlang/git-19.3.6...
Checking out docsh git repository from https://github.com/erszcz/docsh.git...
Installing docsh for git-19.3.6 from git, please wait...
+ : yes
+ ./install.sh
+ yes
+ DEBUG=1 ./install.sh

Installing docsh

This install script will make docsh globally available in your
user environment.
It will install the following files:

  /home/erszcz/.erlang
  /home/erszcz/.erlang.d/user_default.erl

To know more about these files please refer to:

  man erl - sections about 'The .erlang startup file'
            and 'user_default and shell_default'
  man shell_default - parts about user_default

===> Load global config file /home/erszcz/.config/rebar3/rebar.config
===> Expanded command sequence to be run: [{default,app_discovery},
                                                  {default,install_deps},
                                                  {default,lock},
                                                  {default,compile}]
===> Verifying dependencies...
===> Fetching parse_trans ({git,
                                   "https://github.com/uwiger/parse_trans.git",
                                   {ref,
                                    "4fadce8a5242479b4ebc0d2b5825bdfe1de0af1c"}})
===> sh info:
     cwd: "/home/erszcz/.kerl/builds/git-19.3.6/docsh"
     cmd: git --version

===>    opts: []

===> Port Cmd: git --version
Port Opts: [exit_status,{line,16384},use_stdio,stderr_to_stdout,hide,eof]

===> sh info:
     cwd: "/home/erszcz/.kerl/builds/git-19.3.6/docsh"
     cmd: git clone -n https://github.com/uwiger/parse_trans.git .tmp_dir987767996134

===>    opts: [{cd,"/tmp"}]

===> Port Cmd: git clone -n https://github.com/uwiger/parse_trans.git .tmp_dir987767996134
Port Opts: [{cd,"/tmp"},
            exit_status,
            {line,16384},
            use_stdio,stderr_to_stdout,hide,eof]

===> sh info:
     cwd: "/home/erszcz/.kerl/builds/git-19.3.6/docsh"
     cmd: git checkout -q 4fadce8a5242479b4ebc0d2b5825bdfe1de0af1c

===>    opts: [{cd,"/tmp/.tmp_dir987767996134"}]

===> Port Cmd: git checkout -q 4fadce8a5242479b4ebc0d2b5825bdfe1de0af1c
Port Opts: [{cd,"/tmp/.tmp_dir987767996134"},
            exit_status,
            {line,16384},
            use_stdio,stderr_to_stdout,hide,eof]

===> Moving checkout "/tmp/.tmp_dir987767996134" to "/home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/parse_trans"
===> sh info:
     cwd: "/home/erszcz/.kerl/builds/git-19.3.6/docsh"
     cmd: mv /tmp/.tmp_dir987767996134 /home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/parse_trans

===>    opts: [{use_stdout,false},abort_on_error]

===> Port Cmd: mv /tmp/.tmp_dir987767996134 /home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/parse_trans
Port Opts: [exit_status,{line,16384},use_stdio,stderr_to_stdout,hide,eof]

===> Fetching edown ({git,"git://github.com/uwiger/edown.git",
                                 {ref,"abd9f5bbf9265a0a25640a677824386e199e91a6"}})
===> sh info:
     cwd: "/home/erszcz/.kerl/builds/git-19.3.6/docsh"
     cmd: git clone -n git://github.com/uwiger/edown.git .tmp_dir51298746757

===>    opts: [{cd,"/tmp"}]

===> Port Cmd: git clone -n git://github.com/uwiger/edown.git .tmp_dir51298746757
Port Opts: [{cd,"/tmp"},
            exit_status,
            {line,16384},
            use_stdio,stderr_to_stdout,hide,eof]

===> sh info:
     cwd: "/home/erszcz/.kerl/builds/git-19.3.6/docsh"
     cmd: git checkout -q abd9f5bbf9265a0a25640a677824386e199e91a6

===> Port Cmd: git checkout -q abd9f5bbf9265a0a25640a677824386e199e91a6
Port Opts: [{cd,"/tmp/.tmp_dir51298746757"},
            exit_status,
            {line,16384},
            use_stdio,stderr_to_stdout,hide,eof]

===> Moving checkout "/tmp/.tmp_dir51298746757" to "/home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/edown"
===> sh info:
     cwd: "/home/erszcz/.kerl/builds/git-19.3.6/docsh"
     cmd: mv /tmp/.tmp_dir51298746757 /home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/edown

===>    opts: [{use_stdout,false},abort_on_error]

===> Port Cmd: mv /tmp/.tmp_dir51298746757 /home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/edown
Port Opts: [exit_status,{line,16384},use_stdio,stderr_to_stdout,hide,eof]

===> sh info:
     cwd: "/home/erszcz/.kerl/builds/git-19.3.6/docsh"
     cmd: git --git-dir="/home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/edown/.git" rev-parse --verify HEAD

===>    opts: [{use_stdout,false},
                       {debug_abort_on_error,
                           "Locking of git dependency failed in /home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/edown"}]

===> Port Cmd: git --git-dir="/home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/edown/.git" rev-parse --verify HEAD
Port Opts: [exit_status,{line,16384},use_stdio,stderr_to_stdout,hide,eof]

===> sh info:
     cwd: "/home/erszcz/.kerl/builds/git-19.3.6/docsh"
     cmd: git --git-dir="/home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/parse_trans/.git" rev-parse --verify HEAD

===>    opts: [{use_stdout,false},
                       {debug_abort_on_error,
                           "Locking of git dependency failed in /home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/parse_trans"}]

===> Port Cmd: git --git-dir="/home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/parse_trans/.git" rev-parse --verify HEAD
Port Opts: [exit_status,{line,16384},use_stdio,stderr_to_stdout,hide,eof]

===> Compiling edown
===> run_hooks("/home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/edown", pre_hooks, compile) -> no hooks defined

===> run_hooks("/home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/edown", pre_hooks, erlc_compile) -> no hooks defined

===> erlopts [debug_info,debug_info]
===> files to compile ["/home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/edown/src/edown_lib.erl",
                              "/home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/edown/src/edown_layout.erl",
                              "/home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/edown/src/edown_xmerl.erl",
                              "/home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/edown/src/edown_doclet.erl",
                              "/home/erszcz/.kerl/builds/git-19.3.6/docsh/_build/default/lib/edown/src/edown_make.erl"]
./install.sh: line 57: 25278 Killed                  ./rebar3 compile
Couldn't compile docsh
+ [ 1 -ne 0 ]
+ echo Couldn't install docsh
Couldn't install docsh
+ exit 1

1 files changed, 6 insertions, 2 deletions

diff --git a/kerl b/kerl
index 20f4b04..44b9574 100755
--- a/kerl
+++ b/kerl
@@ -1135,10 +1135,14 @@ install_docsh() {
     fi
 
     echo "Installing docsh for $BUILDNAME from git, please wait..."
-    yes | ./install.sh > /dev/null 2>&1
+    # TODO: MUST troubleshoot the install script failure
+    set -x
+    : yes | ./install.sh > /dev/null 2>&1
+    : yes | DEBUG=1 ./install.sh
+    yes | ./install.sh
     if [ $? -ne 0 ]; then
         echo "Couldn't install docsh"
-        rm -Rf "$DOCSH_DIR"
+        #rm -Rf "$DOCSH_DIR"
         exit 1
     fi
 }