diff --git a/_converter b/_converter new file mode 100644 index 0000000..e21d7fb --- /dev/null +++ b/_converter @@ -0,0 +1,205 @@ +#compdef converter + +# zsh completion for converter -*- shell-script -*- + +__converter_debug() +{ + local file="$BASH_COMP_DEBUG_FILE" + if [[ -n ${file} ]]; then + echo "$*" >> "${file}" + fi +} + +_converter() +{ + local shellCompDirectiveError=1 + local shellCompDirectiveNoSpace=2 + local shellCompDirectiveNoFileComp=4 + local shellCompDirectiveFilterFileExt=8 + local shellCompDirectiveFilterDirs=16 + + local lastParam lastChar flagPrefix requestComp out directive comp lastComp noSpace + local -a completions + + __converter_debug "\n========= starting completion logic ==========" + __converter_debug "CURRENT: ${CURRENT}, words[*]: ${words[*]}" + + # The user could have moved the cursor backwards on the command-line. + # We need to trigger completion from the $CURRENT location, so we need + # to truncate the command-line ($words) up to the $CURRENT location. + # (We cannot use $CURSOR as its value does not work when a command is an alias.) + words=("${=words[1,CURRENT]}") + __converter_debug "Truncated words[*]: ${words[*]}," + + lastParam=${words[-1]} + lastChar=${lastParam[-1]} + __converter_debug "lastParam: ${lastParam}, lastChar: ${lastChar}" + + # For zsh, when completing a flag with an = (e.g., converter -n=) + # completions must be prefixed with the flag + setopt local_options BASH_REMATCH + if [[ "${lastParam}" =~ '-.*=' ]]; then + # We are dealing with a flag with an = + flagPrefix="-P ${BASH_REMATCH}" + fi + + # Prepare the command to obtain completions + requestComp="${words[1]} __complete ${words[2,-1]}" + if [ "${lastChar}" = "" ]; then + # If the last parameter is complete (there is a space following it) + # We add an extra empty parameter so we can indicate this to the go completion code. + __converter_debug "Adding extra empty parameter" + requestComp="${requestComp} \"\"" + fi + + __converter_debug "About to call: eval ${requestComp}" + + # Use eval to handle any environment variables and such + out=$(eval ${requestComp} 2>/dev/null) + __converter_debug "completion output: ${out}" + + # Extract the directive integer following a : from the last line + local lastLine + while IFS='\n' read -r line; do + lastLine=${line} + done < <(printf "%s\n" "${out[@]}") + __converter_debug "last line: ${lastLine}" + + if [ "${lastLine[1]}" = : ]; then + directive=${lastLine[2,-1]} + # Remove the directive including the : and the newline + local suffix + (( suffix=${#lastLine}+2)) + out=${out[1,-$suffix]} + else + # There is no directive specified. Leave $out as is. + __converter_debug "No directive found. Setting do default" + directive=0 + fi + + __converter_debug "directive: ${directive}" + __converter_debug "completions: ${out}" + __converter_debug "flagPrefix: ${flagPrefix}" + + if [ $((directive & shellCompDirectiveError)) -ne 0 ]; then + __converter_debug "Completion received error. Ignoring completions." + return + fi + + local activeHelpMarker="_activeHelp_ " + local endIndex=${#activeHelpMarker} + local startIndex=$((${#activeHelpMarker}+1)) + local hasActiveHelp=0 + while IFS='\n' read -r comp; do + # Check if this is an activeHelp statement (i.e., prefixed with $activeHelpMarker) + if [ "${comp[1,$endIndex]}" = "$activeHelpMarker" ];then + __converter_debug "ActiveHelp found: $comp" + comp="${comp[$startIndex,-1]}" + if [ -n "$comp" ]; then + compadd -x "${comp}" + __converter_debug "ActiveHelp will need delimiter" + hasActiveHelp=1 + fi + + continue + fi + + if [ -n "$comp" ]; then + # If requested, completions are returned with a description. + # The description is preceded by a TAB character. + # For zsh's _describe, we need to use a : instead of a TAB. + # We first need to escape any : as part of the completion itself. + comp=${comp//:/\\:} + + local tab="$(printf '\t')" + comp=${comp//$tab/:} + + __converter_debug "Adding completion: ${comp}" + completions+=${comp} + lastComp=$comp + fi + done < <(printf "%s\n" "${out[@]}") + + # Add a delimiter after the activeHelp statements, but only if: + # - there are completions following the activeHelp statements, or + # - file completion will be performed (so there will be choices after the activeHelp) + if [ $hasActiveHelp -eq 1 ]; then + if [ ${#completions} -ne 0 ] || [ $((directive & shellCompDirectiveNoFileComp)) -eq 0 ]; then + __converter_debug "Adding activeHelp delimiter" + compadd -x "--" + hasActiveHelp=0 + fi + fi + + if [ $((directive & shellCompDirectiveNoSpace)) -ne 0 ]; then + __converter_debug "Activating nospace." + noSpace="-S ''" + fi + + if [ $((directive & shellCompDirectiveFilterFileExt)) -ne 0 ]; then + # File extension filtering + local filteringCmd + filteringCmd='_files' + for filter in ${completions[@]}; do + if [ ${filter[1]} != '*' ]; then + # zsh requires a glob pattern to do file filtering + filter="\*.$filter" + fi + filteringCmd+=" -g $filter" + done + filteringCmd+=" ${flagPrefix}" + + __converter_debug "File filtering command: $filteringCmd" + _arguments '*:filename:'"$filteringCmd" + elif [ $((directive & shellCompDirectiveFilterDirs)) -ne 0 ]; then + # File completion for directories only + local subdir + subdir="${completions[1]}" + if [ -n "$subdir" ]; then + __converter_debug "Listing directories in $subdir" + pushd "${subdir}" >/dev/null 2>&1 + else + __converter_debug "Listing directories in ." + fi + + local result + _arguments '*:dirname:_files -/'" ${flagPrefix}" + result=$? + if [ -n "$subdir" ]; then + popd >/dev/null 2>&1 + fi + return $result + else + __converter_debug "Calling _describe" + if eval _describe "completions" completions $flagPrefix $noSpace; then + __converter_debug "_describe found some completions" + + # Return the success of having called _describe + return 0 + else + __converter_debug "_describe did not find completions." + __converter_debug "Checking if we should do file completion." + if [ $((directive & shellCompDirectiveNoFileComp)) -ne 0 ]; then + __converter_debug "deactivating file completion" + + # We must return an error code here to let zsh know that there were no + # completions found by _describe; this is what will trigger other + # matching algorithms to attempt to find completions. + # For example zsh can match letters in the middle of words. + return 1 + else + # Perform file completion + __converter_debug "Activating file completion" + + # We must return the result of this command, so it must be the + # last command, or else we must store its result to return it. + _arguments '*:filename:_files'" ${flagPrefix}" + fi + fi + fi +} + +# don't run the completion function when being source-ed or eval-ed +if [ "$funcstack[1]" = "_converter" ]; then + _converter +fi diff --git a/cmd/root.go b/cmd/root.go index fa3e205..556e5be 100644 --- a/cmd/root.go +++ b/cmd/root.go @@ -1,11 +1,8 @@ package cmd import ( - "fmt" "os" - "strconv" - u "github.com/bcicen/go-units" "github.com/spf13/cobra" ) @@ -13,39 +10,9 @@ var ( from string to string rootCmd = &cobra.Command{ - Use: "converter FROM TO VALUE", - Short: "A brief description of your application", - Long: `A longer description that spans multiple lines and likely contains -examples and usage of using your application. For example: - -Cobra is a CLI library for Go that empowers applications. -This application is a tool to generate the needed files -to quickly create a Cobra application.`, - Args: cobra.MatchAll(cobra.ExactArgs(3)), - Run: func(cmd *cobra.Command, args []string) { - in, err := strconv.ParseFloat(args[2], 64) - if err != nil { - fmt.Println(err.Error()) - return - } - fromVal, err := u.Find(args[0]) - if err != nil { - fmt.Println(err.Error()) - return - } - toVal, err := u.Find(args[1]) - if err != nil { - fmt.Println(err.Error()) - return - } - val := u.NewValue(in, fromVal) - out, err := val.Convert(toVal) - if err != nil { - fmt.Println(err.Error()) - return - } - fmt.Println(out.String()) - }, + Use: "converter", + Short: "converts your value from and to your given units", + Long: `will search for units matching from and to and convert your value accordingly`, } ) diff --git a/cmd/units.go b/cmd/units.go new file mode 100644 index 0000000..3cb935c --- /dev/null +++ b/cmd/units.go @@ -0,0 +1,69 @@ +package cmd + +import ( + "fmt" + "strconv" + "strings" + + u "github.com/bcicen/go-units" + "github.com/spf13/cobra" +) + +// unitsCmd represents the units command +var unitsCmd = &cobra.Command{ + Use: "units FROM TO VALUE", + Aliases: []string{"u", "unit"}, + Short: "converts your value from and to your given units", + Long: `will search for units matching from and to and convert your value accordingly`, + Args: cobra.MatchAll(cobra.ExactArgs(3), cobra.OnlyValidArgs), + ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) { + if len(args) >= 2 { + return nil, cobra.ShellCompDirectiveNoFileComp + } + return getUnitNames(toComplete), cobra.ShellCompDirectiveNoFileComp + }, + Run: func(cmd *cobra.Command, args []string) { + in, err := strconv.ParseFloat(args[2], 64) + if err != nil { + fmt.Println(err.Error()) + return + } + fromVal, err := u.Find(args[0]) + if err != nil { + fmt.Println(err.Error()) + return + } + toVal, err := u.Find(args[1]) + if err != nil { + fmt.Println(err.Error()) + return + } + val := u.NewValue(in, fromVal) + out, err := val.Convert(toVal) + if err != nil { + fmt.Println(err.Error()) + return + } + fmt.Println(out.String()) + }, +} + +func getUnitNames(in string) []string { + out := []string{} + for _, name := range u.All() { + if in == "" { + out = append(out, name.Names()...) + } else { + for _, n := range name.Names() { + if strings.HasPrefix(n, in) { + out = append(out, n) + } + } + } + } + return out +} + +func init() { + rootCmd.AddCommand(unitsCmd) +} diff --git a/converter b/converter new file mode 100755 index 0000000..fac2b2a Binary files /dev/null and b/converter differ