gamepack-manager: use GNU sed on macOS and avoid GNU cp option

diff --git a/gamepack-manager b/gamepack-manager
index f06ccf7af54becd74d309e7249160761527a3487..14d8ceb23d057da8e1a791a6210bdd0db44497b4 100755 (executable)
--- a/gamepack-manager
+++ b/gamepack-manager
@@ -3,8 +3,8 @@
 # get usage help this way:
 # ./gamepack_manager -h
 
-: "${CP:=cp -v}"
-: "${CP_R:=cp -r --preserve=timestamps}"
+: "${CP:=cp -va}"
+: "${CP_R:=cp -Rva}"
 : "${GIT:=git}"
 : "${SVN:=svn}"
 : "${WGET:=wget}"
@@ -81,6 +81,17 @@ Xonotic         GPL          git     https://gitlab.com/xonotic/netradiant-xonot
 EOF
 }
 
+if command -v gsed >/dev/null
+then
+       SED=gsed
+elif sed --help >/dev/null 2>&1
+then
+       SED=sed
+else
+       printf 'ERROR: GNU sed is missing\n' >&2
+       exit 1
+fi
+
 printRealPath ()
 {
        if command -v grealpath >/dev/null
@@ -105,21 +116,15 @@ printRealPath ()
                else
                        if ! python -c "import os; print(os.path.realpath('${1}'))"
                        then
-                               printf 'ERROR: no known way to compute real path of a file' >&2
-                               return 1
+                               printf 'ERROR: GNU realpath or other way to compute real path of a file is missing\n' >&2
+                               exit 1
                        fi
                fi
        fi
 }
 
-if "${mkdir_download}"
-then
-       ${MKDIR_P} "${download_dir}"
-       real_download_dir="$(printRealPath "${download_dir}")"
-fi
-
 sanitizeDB () {
-       sed -e 's/#.*//;s/[ \t][ \t][ \t]*/\t/g;s/^[ \t]*//;s/[ \t]*$//' \
+       ${SED} -e 's/#.*//;s/[ \t][ \t][ \t]*/\t/g;s/^[ \t]*//;s/[ \t]*$//' \
        | grep -v '^$'
 }
 
@@ -137,7 +142,7 @@ printList () {
 dedupeList () {
        printList "${1}" \
        | tr '\n' ' ' \
-       | sed -e 's/ $//'
+       | ${SED} -e 's/ $//'
 }
 
 printGamePackDB () {
@@ -499,13 +504,13 @@ printHelp () {
        ${tab}${tab}select games by name (default: none)
        ${tab}${tab}special keyword: all, none
        ${tab}${tab}available games:
-       $(printNameList | sed -e 's/^/\t\t\t/')
+       $(printNameList | ${SED} -e 's/^/\t\t\t/')
 
        ${tab}-l, --license LICENSES…
        ${tab}${tab}select games by license (default: none)
        ${tab}${tab}special keyword: free, all, none
        ${tab}${tab}available licenses:
-       $(printLicenseList | sed -e 's/^/\t\t\t/')
+       $(printLicenseList | ${SED} -e 's/^/\t\t\t/')
 
        ACTIONS:
        ${tab}-ln, --list-names
@@ -700,6 +705,12 @@ fi
 
 selected_list="$(dedupeList "${selected_list}")"
 
+if "${mkdir_download}"
+then
+       ${MKDIR_P} "${download_dir}"
+       real_download_dir="$(printRealPath "${download_dir}")"
+fi
+
 if "${mkdir_install}"
 then
        ${MKDIR_P} "${install_dir}"