cpt-list: add operation to check package version

FossilOrigin-Name: cb29ddc4ff97a89174e0345cd0e4311eb76203a11608dfe117611be7445629ce

1 files changed, 16 insertions, 3 deletions

diff --git a/src/cpt-list b/src/cpt-list
index fcb1f49..a924091 100755
--- a/src/cpt-list
+++ b/src/cpt-list
@@ -4,25 +4,38 @@
 parser_definition() {
     setup REST help:usage -- \
         "usage: ${0##*/} [-cq] pkg..." \
-        "or:    ${0##*/} -C pkg true-statement false-statement"
+        "or:    ${0##*/} -C pkg true-statement false-statement" \
+        "or:    ${0##*/} -V pkg version release"
     msg -- '' 'Options:'
     flag CURRENT -c --current -- "Use the current directory as a package"
     flag quiet   -q --quiet   -- "Make the operation quiet"
-    param PKG    -C --check label:"    -C,--check PKG TRUE FALSE" -- \
-          "Check if PKG exists and return the string of TRUE if"\
+    param PKG    -C --check label:"-C, --check PKG TRUE FALSE" -- \
+          "Check if PKG exists and return the string of TRUE if" \
           "it exists, and the string of FALSE if it doesn't." \
           "Useful for optional packaging."
+    flag VERSIONCHECK -V --version-check label:"-V, --version-check PKG VER REL" -- \
+        "Check if given package exists in the given version" \
+        "and release numbers. Returns success or failure depending" \
+        "on the outcome."
     global_options
 }
 
 if [ -f ./cpt-lib ]; then . ./cpt-lib; else . cpt-lib; fi
 
+# There is no proper way I can think of doing this directly in the option
+# parser, so let's make sure that only one operation is selected.
+[ "$PKG" ] && [ "$VERSIONCHECK" ] &&
+    die "Only one operation between '-C' and '-V' can be selected."
+
+
 if [ "$PKG" ]; then
     if pkg_list "$PKG" >/dev/null 2>&1; then
         printf %s "$1"
     else
         printf %s "$2"
     fi
+elif [ "$VERSIONCHECK" ]; then
+    pkg_list "$1" | grep -Fq "$1 $2 $3"
 else
     [ "$CURRENT" ] && set -- "${PWD##*/}"
     [ "$quiet" ]   && exec >/dev/null 2>&1