mirror of
https://github.com/alexanderepstein/Bash-Snippets
synced 2018-11-08 02:59:35 +01:00
215 lines
8.7 KiB
Bash
Executable File
215 lines
8.7 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
# Author: Alexander Epstein https://github.com/alexanderepstein
|
|
|
|
currentVersion="1.18.0"
|
|
configuredClient=""
|
|
flagCount="0"
|
|
declare -a simpleOperations=(simplify factor derive integrate zeroes roots tangent area cos sin tan arccos arcsin arctan abs log)
|
|
|
|
## This function determines which http get tool the system has installed and returns an error if there isnt one
|
|
getConfiguredClient()
|
|
{
|
|
if command -v curl &>/dev/null; then
|
|
configuredClient="curl"
|
|
elif command -v wget &>/dev/null; then
|
|
configuredClient="wget"
|
|
elif command -v http &>/dev/null; then
|
|
configuredClient="httpie"
|
|
elif command -v fetch &>/dev/null; then
|
|
configuredClient="fetch"
|
|
else
|
|
echo "Error: This tool reqires either curl, wget, httpie or fetch to be installed." >&2
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
## Allows to call the users configured client without if statements everywhere
|
|
httpGet()
|
|
{
|
|
case "$configuredClient" in
|
|
curl) curl -A curl -s "$@" ;;
|
|
wget) wget -qO- "$@" ;;
|
|
httpie) http -b GET "$@" ;;
|
|
fetch) fetch -q "$@" ;;
|
|
esac
|
|
}
|
|
|
|
|
|
checkInternet()
|
|
{
|
|
httpGet github.com > /dev/null 2>&1 || { echo "Error: no active internet connection" >&2; return 1; } # query github with a get request
|
|
}
|
|
|
|
|
|
update()
|
|
{
|
|
# Author: Alexander Epstein https://github.com/alexanderepstein
|
|
# Update utility version 2.2.0
|
|
# To test the tool enter in the defualt values that are in the examples for each variable
|
|
repositoryName="Bash-Snippets" #Name of repostiory to be updated ex. Sandman-Lite
|
|
githubUserName="alexanderepstein" #username that hosts the repostiory ex. alexanderepstein
|
|
nameOfInstallFile="install.sh" # change this if the installer file has a different name be sure to include file extension if there is one
|
|
latestVersion=$(httpGet https://api.github.com/repos/$githubUserName/$repositoryName/tags | grep -Eo '"name":.*?[^\\]",'| head -1 | grep -Eo "[0-9.]+" ) #always grabs the tag without the v option
|
|
|
|
if [[ $currentVersion == "" || $repositoryName == "" || $githubUserName == "" || $nameOfInstallFile == "" ]]; then
|
|
echo "Error: update utility has not been configured correctly." >&2
|
|
exit 1
|
|
elif [[ $latestVersion == "" ]]; then
|
|
echo "Error: no active internet connection" >&2
|
|
exit 1
|
|
else
|
|
if [[ "$latestVersion" != "$currentVersion" ]]; then
|
|
echo "Version $latestVersion available"
|
|
echo -n "Do you wish to update $repositoryName [Y/n]: "
|
|
read -r answer
|
|
if [[ "$answer" == [Yy] ]]; then
|
|
cd ~ || { echo 'Update Failed'; exit 1; }
|
|
if [[ -d ~/$repositoryName ]]; then rm -r -f $repositoryName || { echo "Permissions Error: try running the update as sudo"; exit 1; } ; fi
|
|
echo -n "Downloading latest version of: $repositoryName."
|
|
git clone -q "https://github.com/$githubUserName/$repositoryName" && touch .BSnippetsHiddenFile || { echo "Failure!"; exit 1; } &
|
|
while [ ! -f .BSnippetsHiddenFile ]; do { echo -n "."; sleep 2; };done
|
|
rm -f .BSnippetsHiddenFile
|
|
echo "Success!"
|
|
cd $repositoryName || { echo 'Update Failed'; exit 1; }
|
|
git checkout "v$latestVersion" 2> /dev/null || git checkout "$latestVersion" 2> /dev/null || echo "Couldn't git checkout to stable release, updating to latest commit."
|
|
chmod a+x install.sh #this might be necessary in your case but wasnt in mine.
|
|
./$nameOfInstallFile "update" || exit 1
|
|
cd ..
|
|
rm -r -f $repositoryName || { echo "Permissions Error: update succesfull but cannot delete temp files located at ~/$repositoryName delete this directory with sudo"; exit 1; }
|
|
else
|
|
exit 1
|
|
fi
|
|
else
|
|
echo "$repositoryName is already the latest version"
|
|
fi
|
|
fi
|
|
}
|
|
|
|
validateExpression()
|
|
{
|
|
local parsedExpression # only used here
|
|
originalEquation=$(echo $1 | sed "s/\[/\(/g" | sed "s/\]/\)/g") # accont for the fact that we have to use brackets and not parenthesis
|
|
parsedExpression=$(echo $1 | sed "s/\[/\(/g" | sed "s/\]/\)/g" | grep -Eo "[0-9 + -- / * ^ . a-z A-Z ~ : ( ) ]*") # only grepping valid characters
|
|
if [ "$parsedExpression" != "$originalEquation" ];then { echo "Error: Expression contains invalid characters"; return 1; }; fi # compare result to original
|
|
return 0
|
|
}
|
|
|
|
encodeEquation()
|
|
{
|
|
equation=$(echo $originalEquation | sed "s:/:(over):g" | sed "s/~/|/g" | sed "s/-/%2D/g") # encode all the special characters
|
|
}
|
|
|
|
validateOperation()
|
|
{
|
|
operation=$(echo $1 | tr "[[:upper:]]" "[[:lower:]]") # get rid of case being an issue
|
|
validOp="false" # lets us know if oeration is valid
|
|
for op in "${simpleOperations[@]}"; do # go through all valid simple operations
|
|
if [[ "$op" == "$operation" ]]; then { opType="simple"; validOp="true"; break; }; fi # if the operation matches leave the loop
|
|
done
|
|
if ! $validOp; then { echo "Error: invalid operation, run newton -h to get a list of valid operations"; return 1; }; fi # if not a valid operation error out
|
|
if [[ $operation == "roots" ]]; then operation=zeroes;fi # I gave the ability to use root or zeores but real op is zeroes
|
|
}
|
|
|
|
getSimpleResponse()
|
|
{
|
|
result=$(httpGet https://newton.now.sh/$operation/$equation | grep -Eo '"result":"[a-z A-Z 0-9 ( ) \^ / -- + , ]*' | sed s/'"result":"'//g | tr '"' " ") # get reponse, grab result
|
|
if [[ $result == "" ]];then { echo "Error: no result was returned, did you use valid characters?"; return 1; }; fi # if result is empty sometthing went wrong...
|
|
}
|
|
|
|
printAnswer()
|
|
{
|
|
cat <<EOF
|
|
================================
|
|
|Operation: $operation
|
|
|Expression: $originalEquation
|
|
|Result: $result
|
|
================================
|
|
EOF
|
|
}
|
|
|
|
|
|
usage()
|
|
{
|
|
cat <<EOF
|
|
Newton
|
|
Description: Performs numerical calculations all the way up to symbolic math parsing.
|
|
Usage: newton [optionalFlags] [operation] [expression] or newton [flag]
|
|
-r Only print the result, useful for piping output elsewhere
|
|
-u Update Bash-Snippet Tools
|
|
-h Show the help
|
|
-v Get the tool version
|
|
===================================================
|
|
|Operations Sample Expression Sample Result|
|
|
|---------------------------------------------------|
|
|
|Simplify [[2x^2]+7]*[4x^2] 8 x^4 + 28 x^2 |
|
|
|Factor x^2 + 2x x (x + 2) |
|
|
|Derive x^2+2x 2 x + 2 |
|
|
|Integrate x^2+2x 1/3 x^3 + x^2 +C|
|
|
|Roots/Zeroes x^2+2x 2, 0 |
|
|
|Tangent 2~x^3 12 x + -16 | (Finding tangent line when x=2 for expression x^3)
|
|
|Area 2:4~x^3 60 | (Finding area under curve from 2 to 4 for expression x^3)
|
|
|Cos pi -1 |
|
|
|Sin pi 0 |
|
|
|Tan pi/4 1 |
|
|
|ArcCos 1 0 |
|
|
|ArcSin 0 0 |
|
|
|ArcTan pi arcsin(pi) |
|
|
|Abs -2 2 |
|
|
|Log 2~8 3 | (Log base 2 of eight)
|
|
===================================================
|
|
Valid Symbols:
|
|
+ add
|
|
- subtract
|
|
[ left parenthesis (you must use brackets bash has a bultin for parenthesis)
|
|
] right parenthesis (you must use brackets bash has a bultin for parenthesis)
|
|
* multiply
|
|
/ divide
|
|
^ power
|
|
: between the range of left and right side (only for area under curve)
|
|
~ parameter on right side (only for area, tangent line and log)
|
|
EOF
|
|
}
|
|
|
|
|
|
getConfiguredClient || exit 1
|
|
|
|
while getopts "ur:vh" opt; do
|
|
case "$opt" in
|
|
\?) echo "Invalid option: -$OPTARG" >&2
|
|
exit 1
|
|
;;
|
|
h) usage
|
|
exit 0
|
|
;;
|
|
v) echo "Version $currentVersion"
|
|
exit 0
|
|
;;
|
|
u) update
|
|
exit 0
|
|
;;
|
|
r) resultOnly="true" && flagCount=$((flagCount + 1 ));;
|
|
:) echo "Option -$OPTARG requires an argument." >&2
|
|
exit 1
|
|
;;
|
|
esac
|
|
done
|
|
|
|
if [[ $# == "0" ]]; then usage && exit 0
|
|
elif [[ $# == "1" ]]; then
|
|
if [[ $1 == "update" ]]; then checkInternet && update && exit 0 || exit 1
|
|
elif [[ $1 == "help" ]]; then usage && exit 0 || exit 1
|
|
else echo "Error: newton needs two arguments, operation and expression" && exit 1;fi
|
|
elif [ $# -gt 3 ];then echo "Error: newton only accepts two arguments, operation and expression" && exit 1;fi
|
|
|
|
# flagCount helps us determine what argument to pass to the functions
|
|
# flow: validateOperation, validateExpression, encodeEquation, getResponse, print Answer/Result
|
|
checkInternet || exit 1
|
|
if [[ $flagCount == "0" ]];then validateOperation $1 || exit 1
|
|
elif [[ $flagCount == "1" ]];then validateOperation $2 || exit 1; fi
|
|
if [[ $flagCount == "0" ]];then validateExpression $2 || exit 1
|
|
elif [[ $flagCount == "1" ]];then validateExpression $3 || exit 1; fi
|
|
encodeEquation || exit 1
|
|
if [[ $opType == "simple" ]];then getSimpleResponse || exit 1;fi
|
|
if [ -z $resultOnly ];then printAnswer
|
|
else echo $result; fi
|