Document git read-tree --trivial

diff --git a/git-submodule.sh b/git-submodule.sh
index 8bdd99a2f37a8c76fd4b08e6736d7a67da47be1e..89a388535026258d65ecba3c0dd6de68e2b06cb4 100755 (executable)
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -25,6 +25,19 @@ say()
        fi
 }
 
+#
+# Map submodule path to submodule name
+#
+# $1 = path
+#
+module_name()
+{
+       name=$(GIT_CONFIG=.gitmodules git-config --get-regexp '^submodule\..*\.path$' "$1" |
+       sed -nre 's/^submodule\.(.+)\.path .+$/\1/p')
+       test -z "$name" &&
+       die "No submodule mapping found in .gitmodules for path '$path'"
+       echo "$name"
+}
 
 #
 # Clone a submodule
@@ -49,7 +62,7 @@ module_clone()
        die "A file already exist at path '$path'"
 
        git-clone -n "$url" "$path" ||
-       die "Clone of submodule '$path' failed"
+       die "Clone of '$url' into submodule path '$path' failed"
 }
 
 #
@@ -63,17 +76,18 @@ modules_init()
        while read mode sha1 stage path
        do
                # Skip already registered paths
-               url=$(git-config submodule."$path".url)
+               name=$(module_name "$path") || exit
+               url=$(git-config submodule."$name".url)
                test -z "$url" || continue
 
-               url=$(GIT_CONFIG=.gitmodules git-config module."$path".url)
+               url=$(GIT_CONFIG=.gitmodules git-config submodule."$name".url)
                test -z "$url" &&
-               die "No url found for submodule '$path' in .gitmodules"
+               die "No url found for submodule path '$path' in .gitmodules"
 
-               git-config submodule."$path".url "$url" ||
-               die "Failed to register url for submodule '$path'"
+               git-config submodule."$name".url "$url" ||
+               die "Failed to register url for submodule path '$path'"
 
-               say "Submodule '$path' registered with url '$url'"
+               say "Submodule '$name' ($url) registered for path '$path'"
        done
 }
 
@@ -87,38 +101,40 @@ modules_update()
        git ls-files --stage -- "$@" | grep -e '^160000 ' |
        while read mode sha1 stage path
        do
-               url=$(git-config submodule."$path".url)
+               name=$(module_name "$path") || exit
+               url=$(git-config submodule."$name".url)
                if test -z "$url"
                then
                        # Only mention uninitialized submodules when its
                        # path have been specified
                        test "$#" != "0" &&
-                       say "Submodule '$path' not initialized"
+                       say "Submodule path '$path' not initialized"
                        continue
                fi
 
                if ! test -d "$path"/.git
                then
                        module_clone "$path" "$url" || exit
+                       subsha1=
+               else
+                       subsha1=$(unset GIT_DIR && cd "$path" &&
+                               git-rev-parse --verify HEAD) ||
+                       die "Unable to find current revision in submodule path '$path'"
                fi
 
-               subsha1=$(unset GIT_DIR && cd "$path" &&
-                       git-rev-parse --verify HEAD) ||
-               die "Unable to find current revision of submodule '$path'"
-
                if test "$subsha1" != "$sha1"
                then
                        (unset GIT_DIR && cd "$path" && git-fetch &&
                                git-checkout -q "$sha1") ||
-                       die "Unable to checkout '$sha1' in submodule '$path'"
+                       die "Unable to checkout '$sha1' in submodule path '$path'"
 
-                       say "Submodule '$path': checked out '$sha1'"
+                       say "Submodule path '$path': checked out '$sha1'"
                fi
        done
 }
 
 #
-# List all registered submodules, prefixed with:
+# List all submodules, prefixed with:
 #  - submodule not initialized
 #  + different revision checked out
 #
@@ -132,7 +148,9 @@ modules_list()
        git ls-files --stage -- "$@" | grep -e '^160000 ' |
        while read mode sha1 stage path
        do
-               if ! test -d "$path"/.git
+               name=$(module_name "$path") || exit
+               url=$(git-config submodule."$name".url)
+               if test -z "url" || ! test -d "$path"/.git
                then
                        say "-$sha1 $path"
                        continue;