Try to ignore environment modules absence.

remove-duplicates-from-sorted-fastq/Haskell/install.sh

@@ -14,6 +14,11 @@ function error_exit
     exit 1
 }
 
+function try_load_gmp_module
+{
+    (module --version 2> /dev/null && module load gmp) || :
+}
+
 config_file="${HOME}/.stack/config.yaml"
 
 stack --version 2> /dev/null \
@@ -22,7 +27,7 @@ stack --version 2> /dev/null \
 if [ "${config_file}" ]
 then
     stack exec -- ghc --version > /dev/null \
-        || (module load gmp \
+        || (try_load_gmp_module \
             && stack setup \
             && INCLUDE_PATH=$(echo ${CMAKE_INCLUDE_PATH} | tr ":" ",") \
             && LIBRARY_PATH=$(echo ${CMAKE_LIBRARY_PATH} | tr ":" ",") \
@@ -37,7 +42,7 @@ then
     }
 else
     stack exec -- ghc --version > /dev/null \
-        || (module load gmp && stack setup) \
+        || (try_load_gmp_module && stack setup) \
         || error_exit "stack setup failed"
     # https://unix.stackexchange.com/a/60690/55127
     # Delay variable evaluation in order to adapt to loaded libraries
@@ -50,13 +55,13 @@ fi
 
 # cd ${HOME} to ignore local project stack config
 hlint --version 2> /dev/null \
-    || (module load gmp && (cd ${HOME} && make_stack_options && stack ${stack_options} install hlint)) \
+    || (try_load_gmp_module && (cd ${HOME} && make_stack_options && stack ${stack_options} install hlint)) \
     || error_exit "hlint install failed"
 scan --version 2> /dev/null \
-    || (module load gmp && (cd ${HOME} && make_stack_options && stack ${stack_options} install scan)) \
+    || (try_load_gmp_module && (cd ${HOME} && make_stack_options && stack ${stack_options} install scan)) \
     || error_exit "scan install failed"
 doctest --version 2> /dev/null \
-    || (module load gmp && (cd ${HOME} && make_stack_options && stack ${stack_options} install doctest)) \
+    || (try_load_gmp_module && (cd ${HOME} && make_stack_options && stack ${stack_options} install doctest)) \
     || error_exit "doctest install failed"
 
 make_stack_options