Data commit

Task/Read-a-configuration-file/UNIX-Shell/read-a-configuration-file.sh

@@ -0,0 +1,44 @@
+readconfig() (
+    # redirect stdin to read from the given filename
+    exec 0<"$1"
+
+    declare -l varname
+    while IFS=$' =\t' read -ra words; do
+        # is it a comment or blank line?
+        if [[ ${#words[@]} -eq 0 || ${words[0]} == ["#;"]* ]]; then
+            continue
+        fi
+
+        # get the variable name
+        varname=${words[0]}
+
+        # split all the other words by comma
+        value="${words[*]:1}"
+        oldIFS=$IFS IFS=,
+        values=( $value )
+        IFS=$oldIFS
+
+        # assign the other words to a "scalar" variable or array
+        case ${#values[@]} in
+            0) printf '%s=true\n' "$varname" ;;
+            1) printf '%s=%q\n' "$varname" "${values[0]}" ;;
+            *) n=0
+               for value in "${values[@]}"; do
+                   value=${value# }
+                   printf '%s[%d]=%q\n' "$varname" $((n++)) "${value% }"
+               done
+               ;;
+        esac
+    done
+)
+
+# parse the config file and evaluate the output in the current shell
+source <( readconfig config.file )
+
+echo "fullname = $fullname"
+echo "favouritefruit = $favouritefruit"
+echo "needspeeling = $needspeeling"
+echo "seedsremoved = $seedsremoved"
+for i in "${!otherfamily[@]}"; do
+    echo "otherfamily[$i] = ${otherfamily[i]}"
+done