envmodules · xdelaruelle · Jun 2, 2026
diff --git a/NEWS.rst b/NEWS.rst
@@ -73,6 +73,10 @@ Modules 5.7.0 (not yet released)
 * Improve the performance of the module’s column output by removing the costly
   optimization that attempts to fit more columns within the available screen
   width. (fix issue #622)
+* Report the full *via* path for modules on :subcmd:`avail` and
+  :subcmd:`spider` sub-commands rather the last part of this via information.
+  JSON output is updated to report the ``via`` key as an array rather as a
+  string. (fix issue #586)
 
 
 .. _5.6 release notes:

diff --git a/tcl/modfind.tcl.in b/tcl/modfind.tcl.in
@@ -2009,6 +2009,15 @@ proc getLoadedUse {mod} {
    }
 }
 
+proc getViaListModuleForModulepath {modpath} {
+   set via_list {}
+   while {[string length [set via [getViaModuleForModulepath $modpath]]]} {
+      lappend via_list $via
+      set modpath [getViaModuleModulepath $via]
+   }
+   return [lreverse $via_list]
+}
+
 proc getViaModuleForModulepath {modpath} {
    lassign [getAllLoadedModuleUsingModulepath $modpath] via
    if {![string length $via] && $modpath ni [getModulePathList]} {
@@ -2029,6 +2038,23 @@ proc getModuleUsingModulepath {modpath} {
    }
 }
 
+proc setViaModuleModulepath {mod modpath} {
+   # global array only used during spider, no need to integrate into push/pop
+   # restore mechanisms
+   set ::g_viaModuleModulepath($mod) $modpath
+}
+
+proc getViaModuleModulepath {mod} {
+   # get modulepath of via module if loaded
+   if {[isModuleLoaded $mod]} {
+      return [getModulepathFromLoadedOrLoadingModule $mod]
+   }
+   # otherwise return via modulepath collected during spider processing
+   if {[info exists ::g_viaModuleModulepath($mod)]} {
+      return $::g_viaModuleModulepath($mod)
+   }
+}
+
 # Return all loaded module that enables given modulepath. Reference counter
 # is checked to detect if modulepath was enabled prior loading the modules in
 # which case modulepath is considered not enabled by loaded modules. modpath

diff --git a/tcl/report.tcl.in b/tcl/report.tcl.in
@@ -1483,8 +1483,8 @@ proc reportModules {search_queries header hsgrkey hstyle show_mtime show_idx\
       himatcharrvrmap himatcharrvrvalmap
    set clean_list {}
    set vr_list {}
-   set via [expr {[isEltInReport via] ? [getViaModuleForModulepath $header] :\
-      {}}]
+   set via_list [expr {[isEltInReport via] ? [getViaListModuleForModulepath\
+      $header] : {}}]
 
    # treat elements in specified order if any
    ##nagelfar ignore #2 Badly formed if statement
@@ -1510,7 +1510,7 @@ proc reportModules {search_queries header hsgrkey hstyle show_mtime show_idx\
             if {$json} {
                ##nagelfar ignore +2 Found constant
                set dispsgr [formatListEltToJsonDisplay $elt type s directory\
-                  1 symbols a $sym_list 1 via s $via 1]
+                  1 symbols a $sym_list 1 via a $via_list 1]
             } elseif {$show_mtime} {
                # append / char after name to clearly indicate this is a dir
                lassign [formatListEltToLongDisplay $elt di / $sym_list sy {}\
@@ -1527,7 +1527,7 @@ proc reportModules {search_queries header hsgrkey hstyle show_mtime show_idx\
                set dispsgr [formatListEltToJsonDisplay $elt type s modulefile\
                   1 variants o $vr_list $report_variant symbols a $sym_list 1\
                   tags a $tag_list 1 pathname s [lindex $mod_list($elt) 2] 1\
-                  via s $via 1]
+                  via a $via_list 1]
             } elseif {$show_mtime} {
                set clock_mtime [expr {[lindex $mod_list($elt) 1] ne {} ?\
                   [clock format [lindex $mod_list($elt) 1] -format {%Y/%m/%d\
@@ -1549,7 +1549,7 @@ proc reportModules {search_queries header hsgrkey hstyle show_mtime show_idx\
                ##nagelfar ignore +3 Found constant
                set dispsgr [formatListEltToJsonDisplay $elt type s alias 1\
                   symbols a $sym_list 1 tags a $tag_list 1 target s [lindex\
-                  $mod_list($elt) 1] 1 via s $via 1]
+                  $mod_list($elt) 1] 1 via a $via_list 1]
             } elseif {$show_mtime} {
                lassign [formatListEltToLongDisplay $elt al " -> [lindex\
                   $mod_list($elt) 1]" $sym_list sy {} $default_colored\
@@ -1618,7 +1618,7 @@ proc reportModules {search_queries header hsgrkey hstyle show_mtime show_idx\
 
    # output formatted elements
    displayElementList $header $hsgrkey $hstyle $one_per_line $show_idx 1\
-      $display_list $len_list $via
+      $display_list $len_list $via_list
 }
 
 proc showModulePath {} {
@@ -1663,11 +1663,11 @@ proc displaySeparatorLine {{title {}} {sgrkey {}} {extra {}}} {
 # get a list of elements and print them in a column or in a
 # one-per-line fashion
 proc displayElementList {header sgrkey hstyle one_per_line display_idx\
-   start_idx display_list {len_list {}} {via {}}} {
+   start_idx display_list {len_list {}} {via_list {}}} {
    set elt_cnt [llength $display_list]
    reportDebug "header=$header, sgrkey=$sgrkey, hstyle=$hstyle,\
       elt_cnt=$elt_cnt, one_per_line=$one_per_line,\
-      display_idx=$display_idx, start_idx=$start_idx, via=$via"
+      display_idx=$display_idx, start_idx=$start_idx, via=$via_list"
 
    # end proc if no element are to print
    if {$elt_cnt == 0} {
@@ -1682,7 +1682,8 @@ proc displayElementList {header sgrkey hstyle one_per_line display_idx\
       if {$json} {
          report "\"$header\": \{"
       } elseif {$hstyle eq {sepline}} {
-         set extra [expr {[string length $via] ? " (via $via)" : {}}]
+         set extra [expr {[string length $via_list] ? " (via [join $via_list\
+            { > }])" : {}}]
          displaySeparatorLine $header $sgrkey $extra
       } else {
          report [sgr $sgrkey $header]:

diff --git a/tcl/subcmd.tcl.in b/tcl/subcmd.tcl.in
@@ -3137,7 +3137,9 @@ proc cmdModuleSpider {show_oneperline show_mtime show_filter search_filter\
       foreach {new_modpath from_mod_list} [getScanModuleElt $modpath use] {
          if {[string length $new_modpath] && $new_modpath ni $modpath_list} {
             lappend modpath_list $new_modpath
-            setLoadedUse [lindex $from_mod_list 0] $new_modpath
+            set via_mod [lindex $from_mod_list 0]
+            setLoadedUse $via_mod $new_modpath
+            setViaModuleModulepath $via_mod $modpath
          }
       }
    }

diff --git a/testsuite/example/siteconfig.tcl-1 b/testsuite/example/siteconfig.tcl-1
@@ -707,4 +707,8 @@ if {[info exists env(TESTSUITE_ENABLE_SITECONFIG_COMPUTEOUTPUTGRID)]} {
     report [compute_output_grid 80 {} 3]
 }
 
+if {[info exists env(TESTSUITE_ENABLE_SITECONFIG_GETVIAMODULEMODULEPATH)]} {
+    report [string length [getViaModuleModulepath unk]]
+}
+
 }
diff --git a/testsuite/modules.00-init/120-siteconfig.exp b/testsuite/modules.00-init/120-siteconfig.exp
@@ -822,6 +822,13 @@ lappend ans $vers_reportre
 testouterr_cmd_re sh -V OK [join $ans \n]
 unsetenv_var TESTSUITE_ENABLE_SITECONFIG_COMPUTEOUTPUTGRID
 
+setenv_var TESTSUITE_ENABLE_SITECONFIG_GETVIAMODULEMODULEPATH 1
+set ans [list]
+lappend ans 0
+lappend ans $vers_reportre
+testouterr_cmd_re sh -V OK [join $ans \n]
+unsetenv_var TESTSUITE_ENABLE_SITECONFIG_GETVIAMODULEMODULEPATH
+
 } elseif {$verbose} {
     send_user "\tSkip tests relying on an excepted siteconfig file installed\n"
 }

diff --git a/testsuite/modules.50-cmds/570-modulepath-label.exp b/testsuite/modules.50-cmds/570-modulepath-label.exp
@@ -55,7 +55,7 @@ label/1.0                                                   \[0-9\/]{10} \[0-9:]
 testouterr_cmd_re sh {avail -l label} OK $tserr
 
 set tserr "{\"My label\": {
-\"label/1.0\": { \"name\": \"label/1.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$modpath.4/label/1.0\", \"via\": \"\"}
+\"label/1.0\": { \"name\": \"label/1.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$modpath.4/label/1.0\", \"via\": \[\]}
 }}"
 testouterr_cmd sh {avail -j label} OK $tserr
 

diff --git a/testsuite/modules.51-scan/020-avail_output-variant.exp b/testsuite/modules.51-scan/020-avail_output-variant.exp
@@ -377,18 +377,18 @@ testouterr_cmd sh {avail -t --no-indepth variant/} OK $tserr
 setenv_var TESTSUITE_VARIANT 13
 
 set tserr "{\"$mp\": {
-\"variant/1.0\": { \"name\": \"variant/1.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/1.0\", \"via\": \"\"},
-\"variant/2.0\": { \"name\": \"variant/2.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/2.0\", \"via\": \"\"},
-\"variant/2.1/2/1\": { \"name\": \"variant/2.1/2/1\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/2.1/2/1\", \"via\": \"\"},
-\"variant/3.0\": { \"name\": \"variant/3.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/3.0\", \"via\": \"\"},
-\"variant/4.0\": { \"name\": \"variant/4.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/4.0\", \"via\": \"\"},
-\"variant/5.0\": { \"name\": \"variant/5.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/5.0\", \"via\": \"\"},
-\"variant/5.1\": { \"name\": \"variant/5.1\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/5.1\", \"via\": \"\"},
-\"variant/6.0\": { \"name\": \"variant/6.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/6.0\", \"via\": \"\"},
-\"variant/7.0\": { \"name\": \"variant/7.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/7.0\", \"via\": \"\"},
-\"variant/7.1\": { \"name\": \"variant/7.1\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/7.1\", \"via\": \"\"},
-\"variant/8.0\": { \"name\": \"variant/8.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/8.0\", \"via\": \"\"},
-\"variant/w s\": { \"name\": \"variant/w s\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/w s\", \"via\": \"\"}
+\"variant/1.0\": { \"name\": \"variant/1.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/1.0\", \"via\": \[\]},
+\"variant/2.0\": { \"name\": \"variant/2.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/2.0\", \"via\": \[\]},
+\"variant/2.1/2/1\": { \"name\": \"variant/2.1/2/1\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/2.1/2/1\", \"via\": \[\]},
+\"variant/3.0\": { \"name\": \"variant/3.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/3.0\", \"via\": \[\]},
+\"variant/4.0\": { \"name\": \"variant/4.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/4.0\", \"via\": \[\]},
+\"variant/5.0\": { \"name\": \"variant/5.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/5.0\", \"via\": \[\]},
+\"variant/5.1\": { \"name\": \"variant/5.1\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/5.1\", \"via\": \[\]},
+\"variant/6.0\": { \"name\": \"variant/6.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/6.0\", \"via\": \[\]},
+\"variant/7.0\": { \"name\": \"variant/7.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/7.0\", \"via\": \[\]},
+\"variant/7.1\": { \"name\": \"variant/7.1\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/7.1\", \"via\": \[\]},
+\"variant/8.0\": { \"name\": \"variant/8.0\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/8.0\", \"via\": \[\]},
+\"variant/w s\": { \"name\": \"variant/w s\", \"type\": \"modulefile\", \"symbols\": \[\], \"tags\": \[\], \"pathname\": \"$mp/variant/w s\", \"via\": \[\]}
 }}"
 testouterr_cmd sh {avail -j variant} OK $tserr