tools/ci: enhance print_toolchain script

    - add generic command version printer
    - add cmake version
    - enhance output structure

dist/tools/ci/print_toolchain_versions.sh

 #!/bin/sh
 
-gcc_version() {
-    local cc
+get_cmd_version() {
     if [ -z "$1" ]; then
-        cc=gcc
-    else
-        cc=$1-gcc
-    fi
-    local ver=
-    if command -v "$cc" 2>&1 >/dev/null; then
-        ver=$("$cc" --version | head -n 1)
+        return
     fi
-    if [ -z "$ver" ]; then
-        ver=missing/error
+
+    local cmd="$1"
+    if command -v "$cmd" 2>&1 >/dev/null; then
+        ver=$("$cmd" --version 2> /dev/null | head -n 1)
+        if [ -z "$ver" ]; then
+            ver="error"
+        fi
+    else
+        ver="missing"
     fi
+
     printf "%s" "$ver"
 }
 
@@ -24,83 +25,52 @@ get_define() {
         line=$(echo "$3" | "$cc" -x c -include "$2" -E -o - - 2>&1 | sed -e '/^[   ]*#/d' -e '/^[  ]*$/d')
     fi
     if [ -z "$line" ]; then
-        line=missing/error
+        line=missing
     fi
     printf "%s" "$line"
 }
 
 newlib_version() {
     if [ -z "$1" ]; then
-        cc=gcc
+        printf "%s" "error"
     else
-        cc=$1-gcc
+        local cc="$1"
+        printf "%s" "$(get_define "$cc" newlib.h _NEWLIB_VERSION)"
     fi
-    printf "%s" "$(get_define "$cc" newlib.h _NEWLIB_VERSION)"
 }
 
 avr_libc_version() {
     if [ -z "$1" ]; then
-        cc=gcc
-    else
-        cc=$1-gcc
-    fi
-    printf "%s (%s)" "$(get_define "$cc" avr/version.h __AVR_LIBC_VERSION_STRING__)" "$(get_define "$cc" avr/version.h __AVR_LIBC_DATE_STRING__)"
-}
-
-cppcheck_version() {
-    local cmd="cppcheck"
-    if command -v "$cmd" 2>&1 >/dev/null; then
-        ver=$("$cmd" --version | head -n 1)
-    else
-        ver="missing"
-    fi
-
-    printf "%s" "$ver"
-}
-
-spatch_version() {
-    local cmd="spatch"
-    if command -v "$cmd" 2>&1 >/dev/null; then
-        ver=$("$cmd" --version | head -n 1)
+        printf "%s" "error"
     else
-        ver="missing"
+        local cc="$1"
+        printf "%s (%s)" "$(get_define "$cc" avr/version.h __AVR_LIBC_VERSION_STRING__)" "$(get_define "$cc" avr/version.h __AVR_LIBC_DATE_STRING__)"
     fi
-
-    printf "%s" "$ver"
 }
 
-git_version() {
-    local cmd="git"
-    if command -v "$cmd" 2>&1 >/dev/null; then
-        ver=$("$cmd" --version | head -n 1)
-    else
-        ver="missing"
-    fi
-
-    printf "%s" "$ver"
-}
-
-printf "%s\n" "Installed toolchain versions"
-printf "%s\n" "----------------------------"
-VER=$(gcc --version | head -n 1)
-if [ -n "$VER" ]; then
-    printf "%20s: %s\n" "native gcc" "$VER"
-fi
-for p in msp430 avr arm-none-eabi mips-mti-elf; do
-    printf "%20s: %s\n" "$p-gcc" "$(gcc_version "$p")"
+printf "%s\n" "Installed compiler toolchains "
+printf "%s\n" "-----------------------------"
+printf "%21s: %s\n" "native gcc" "$(get_cmd_version gcc)"
+for p in arm-none-eabi avr mips-mti-elf msp430; do
+    printf "%21s: %s\n" "$p-gcc" "$(get_cmd_version ${p}-gcc)"
 done
-VER=$(clang --version | head -n 1)
-if [ -n "$VER" ]; then
-    printf "%20s: %s\n" "clang" "$VER"
-fi
-
+printf "%21s: %s\n" "clang" "$(get_cmd_version clang)"
+printf "\n"
+printf "%s\n" "Installed compiler libs"
+printf "%s\n" "-----------------------"
+# platform specific newlib version
 for p in arm-none-eabi mips-mti-elf; do
-    printf "%20s: %s\n" "$p-newlib" "$(newlib_version "$p")"
+    printf "%21s: %s\n" "$p-newlib" "$(newlib_version ${p}-gcc)"
 done
-for p in avr; do
-    printf "%20s: %s\n" "$p-libc" "$(avr_libc_version "$p")"
+# avr libc version
+printf "%21s: %s\n" "avr-libc" "$(avr_libc_version avr-gcc)"
+# tools
+printf "\n"
+printf "%s\n" "Installed development tools"
+printf "%s\n" "---------------------------"
+for c in cmake cppcheck git; do
+    printf "%21s: %s\n" "$c" "$(get_cmd_version $c)"
 done
-printf "%20s: %s\n" "cppcheck" "$(cppcheck_version)"
-printf "%20s: %s\n" "coccinelle" "$(spatch_version)"
-printf "%20s: %s\n" "git" "$(git_version)"
+printf "%21s: %s\n" "coccinelle" "$(get_cmd_version spatch)"
+
 exit 0