software/theia: use a wrapper for shell

To remove GIT_EXEC_PATH from environment as this can break running
buildout with slapos.recipe.build:gitclone sections using an
incompatible git version

software/theia/buildout.hash.cfg

@@ -15,7 +15,7 @@
 
 [instance]
 filename = instance.cfg.in
-md5sum = 21735765808aac82fb91d53341a3c0d6
+md5sum = 9e54a4e1ff1cd609420643ec1251f32f
 
 [yarn.lock]
 filename = yarn.lock

software/theia/instance.cfg.in

@@ -96,7 +96,7 @@ recipe = slapos.cookbook:userinfo
 recipe = slapos.cookbook:wrapper
 wrapper-path = $${directory:services}/$${:_buildout_section_name_}
 command-line =
-  env LC_ALL=C.UTF-8 TMP=$${directory:tmp} ${theia-wrapper:rendered} --hostname=$${:hostname} --port=$${:port}
+  env LC_ALL=C.UTF-8 TMP=$${directory:tmp} THEIA_SHELL=$${theia-shell:wrapper-path} ${theia-wrapper:rendered} --hostname=$${:hostname} --port=$${:port}
 
 ip =  $${instance-parameter:ipv4-random}
 hostname =  $${:ip}
@@ -106,6 +106,13 @@ hash-existing-files =
   ${yarn.lock:output}
   ${theia-wrapper:rendered}
 
+[theia-shell]
+recipe = slapos.cookbook:wrapper
+wrapper-path = $${directory:bin}/$${:_buildout_section_name_}
+command-line =
+  # reset GIT_EXEC_PATH to workaround https://github.com/eclipse-theia/theia/issues/7555
+  env GIT_EXEC_PATH= $SHELL
+
 [promises]
 recipe =
 instance-promises =

software/theia/software.cfg

@@ -267,7 +267,6 @@ template =
   export PATH=${nodejs:location}/bin/:${python-language-server:location}/bin/:${bash:location}/bin/:${git:location}/bin/:$PATH
   . ${gowork:env.sh}
   export THEIA_DEFAULT_PLUGINS="local-dir:${theia:THEIA_DEFAULT_PLUGINS}"
-  export SHELL=bash
   # reset PS1 from gowork
   export PS1='$ '
   cd ${theia:location}