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abs3nt 2023-02-27 23:37:21 -08:00
parent 5266dca432
commit b449a9026b
4 changed files with 277 additions and 36 deletions
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205
_converter Normal file
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@ -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: ${lastChar}"
# For zsh, when completing a flag with an = (e.g., converter -n=<TAB>)
# completions must be prefixed with the flag
setopt local_options BASH_REMATCH
if [[ "${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

39
cmd/root.go
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@ -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`,
}
)

69
cmd/units.go Normal file
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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)
}

BIN
converter Executable file
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