install: add --with-logger{,-opts} configure options

Introduce the --with-logger and --with-logger-opts configure options to
choose at installation time the default logger command and its options
to use to log information. Default logger is 'logger' and its default
options are '-t modules'.

Makefile

@@ -287,6 +287,12 @@ else
   pagercmd := $(pager)
 endif
 
+ifneq ($(loggeropts),)
+  loggercmd := $(logger) $(loggeropts)
+else
+  loggercmd := $(logger)
+endif
+
 ifeq ($(color),y)
   setcolor := auto
 else
@@ -396,6 +402,7 @@ sed -e 's|@prefix@|$(prefix)|g' \
 	-e 's|@TCLSHDIR@/tclsh|$(TCLSH)|g' \
 	-e 's|@TCLSH@|$(TCLSH)|g' \
 	-e 's|@PYTHON@|$(PYTHON)|g' \
+	-e 's|@loggercmd@|$(loggercmd)|g' \
 	-e 's|@pagercmd@|$(pagercmd)|g' \
 	-e 's|@verbosity@|$(verbosity)|g' \
 	-e 's|@color@|$(setcolor)|g' \

Makefile.inc.in

@@ -62,6 +62,10 @@ builddoc := @builddoc@
 # able to use manpath cmd to get currently set manpath
 usemanpath := @usemanpath@
 
+# logger setup
+logger := @logger@
+loggeropts := @loggeropts@
+
 # pager setup
 pager := @pager@
 pageropts := @pageropts@

configure

@@ -39,11 +39,12 @@ windowssupport nearlyforbiddendays implicitrequirement tagabbrev \
 tagcolorname mcookieversioncheck availoutput availterseoutput listoutput \
 listterseoutput editor variantshortcut bashcompletiondir fishcompletiondir \
 zshcompletiondir tcllinter tcllinteropts nagelfardatadir nagelfaraddons \
-stickypurge uniquenameloaded abortonerror sourcecache"
+stickypurge uniquenameloaded abortonerror sourcecache logger loggeropts"
 libarglist=()
 
 # flags to know if argument has been specified on command-line
 defpageropts=1
+defloggeropts=1
 
 # set argument default values
 prefix=/usr/local/Modules
@@ -87,6 +88,8 @@ SED_ERE='sed -E'
 VERSION=
 RELEASE=
 initconfin=etcdir
+logger='logger'
+loggeropts='-t modules'
 pager=less
 pageropts='-eFKRX'
 verbosity=normal
@@ -316,6 +319,12 @@ Optional Packages:
                           configuration files. Either \`initdir' or \`etcdir'
                           [etcdir]
   --with-tclsh=BIN        name or full path of Tcl interpreter shell [tclsh]
+  --with-logger=BIN       name or full path of default logger program to use
+                          to log some evaluation information (can be super-
+                          seeded at run-time by environment variable) [$logger]
+  --with-logger-opts=OPTLIST
+                          settings to apply to default logger program
+                          [$loggeropts]
   --with-pager=BIN        name or full path of default pager program to use to
                           paginate informational message output (can be super-
                           seeded at run-time by environment variable) [$pager]
@@ -703,6 +712,11 @@ for arg in "$@"; do
       fi ;;
    --with-tclsh=*|--without-tclsh)
       tclshbin=$(get_package_value "$arg") ;;
+   --with-logger=*|--without-logger)
+      logger=$(get_package_value "$arg") ;;
+   --with-logger-opts=*|--without-logger-opts)
+      loggeropts=$(get_package_value "$arg")
+      defloggeropts=0 ;;
    --with-pager=*|--without-pager)
       pager=$(get_package_value "$arg") ;;
    --with-pager-opts=*|--without-pager-opts)
@@ -1025,6 +1039,18 @@ check_requirement 'basename' '' "PATH=$binsearchpath"
 # shellcheck disable=SC2034
 BASENAME=$reqpath
 
+# get logger program location from standard PATHs or /usr/local/bin
+# or validate location passed as argument
+if [ -n "$logger" ]; then
+   check_requirement "$logger" '' "PATH=$binsearchpath"
+   logger=$reqpath
+fi
+# adapt logger program settings dependings of specified args
+if [ $defloggeropts -eq 1 ] && [ "${logger##*/}" != 'logger' ]; then
+    loggeropts=''
+    echo_warning "As chosen logger is not \`logger', default logger options are cleared"
+fi
+
 # get pager program location from standard PATHs or /usr/local/bin
 # or validate location passed as argument
 if [ -n "$pager" ]; then

site.exp.in

@@ -47,6 +47,13 @@ if {$install_pageropts ne {}} {
     append install_pagercmd " $install_pageropts"
 }
 
+set install_logger "@logger@"
+set install_loggeropts "@loggeropts@"
+set install_loggercmd $install_logger
+if {$install_loggeropts ne {}} {
+    append install_loggercmd " $install_loggeropts"
+}
+
 set install_verbosity "@verbosity@"
 
 set install_color "@color@"

tcl/init.tcl.in

@@ -113,7 +113,7 @@ array set g_config_defs [list\
    ml {MODULES_ML @ml@ 0 b {0 1}}\
    nearly_forbidden_days {MODULES_NEARLY_FORBIDDEN_DAYS @nearlyforbiddendays@\
       0 i {0 365} {} {} intbe}\
-   pager {MODULES_PAGER {logger -t modules} 0 s}\
+   pager {MODULES_PAGER {@pagercmd@} 0 s}\
    protected_envvars {MODULES_PROTECTED_ENVVARS <undef> 0 l}\
    rcfile {MODULERCFILE <undef> 0 l}\
    redirect_output {MODULES_REDIRECT_OUTPUT 1 0 b {0 1}}\