ntfy/docs/publish/template-functions.md

Template Functions

These template functions may be used in the message template feature of ntfy. Please refer to the examples in the documentation for how to use them.

The original set of template functions is based on the Sprig library. This documentation page is a (slightly modified) copy of their docs. Thank you to the Sprig developers for their work! 🙏

Table of Contents

• String Functions
• String List Functions
• Integer Math Functions
• Integer List Functions
• Float Math Functions
• Date Functions
• Default Functions
• Encoding Functions
• Lists and List Functions
• Dictionaries and Dict Functions
• Type Conversion Functions
• Path and Filepath Functions
• Flow Control Functions
• Reflection Functions
• Cryptographic and Security Functions
• URL Functions

String Functions

Sprig has a number of string manipulation functions.

trim

The trim function removes space from either side of a string:

trim "   hello    "

The above produces hello

trimAll

Remove given characters from the front or back of a string:

trimAll "$" "$5.00"

The above returns 5.00 (as a string).

trimSuffix

Trim just the suffix from a string:

trimSuffix "-" "hello-"

The above returns hello

trimPrefix

Trim just the prefix from a string:

trimPrefix "-" "-hello"

The above returns hello

upper

Convert the entire string to uppercase:

upper "hello"

The above returns HELLO

lower

Convert the entire string to lowercase:

lower "HELLO"

The above returns hello

title

Convert to title case:

title "hello world"

The above returns Hello World

repeat

Repeat a string multiple times:

repeat 3 "hello"

The above returns hellohellohello

substr

Get a substring from a string. It takes three parameters:

• start (int)
• end (int)
• string (string)

substr 0 5 "hello world"

The above returns hello

trunc

Truncate a string (and add no suffix)

trunc 5 "hello world"

The above produces hello.

trunc -5 "hello world"

The above produces world.

contains

Test to see if one string is contained inside of another:

contains "cat" "catch"

The above returns true because catch contains cat.

hasPrefix and hasSuffix

The hasPrefix and hasSuffix functions test whether a string has a given prefix or suffix:

hasPrefix "cat" "catch"

The above returns true because catch has the prefix cat.

quote and squote

These functions wrap a string in double quotes (quote) or single quotes (squote).

cat

The cat function concatenates multiple strings together into one, separating them with spaces:

cat "hello" "beautiful" "world"

The above produces hello beautiful world

indent

The indent function indents every line in a given string to the specified indent width. This is useful when aligning multi-line strings:

indent 4 $lots_of_text

The above will indent every line of text by 4 space characters.

nindent

The nindent function is the same as the indent function, but prepends a new line to the beginning of the string.

nindent 4 $lots_of_text

The above will indent every line of text by 4 space characters and add a new line to the beginning.

replace

Perform simple string replacement.

It takes three arguments:

• string to replace
• string to replace with
• source string

"I Am Henry VIII" | replace " " "-"

The above will produce I-Am-Henry-VIII

plural

Pluralize a string.

len $fish | plural "one anchovy" "many anchovies"

In the above, if the length of the string is 1, the first argument will be printed (one anchovy). Otherwise, the second argument will be printed (many anchovies).

The arguments are:

• singular string
• plural string
• length integer

NOTE: Sprig does not currently support languages with more complex pluralization rules. And 0 is considered a plural because the English language treats it as such (zero anchovies). The Sprig developers are working on a solution for better internationalization.

regexMatch, mustRegexMatch

Returns true if the input string contains any match of the regular expression.

regexMatch "^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}$" "test@acme.com"

The above produces true

regexMatch panics if there is a problem and mustRegexMatch returns an error to the template engine if there is a problem.

regexFindAll, mustRegexFindAll

Returns a slice of all matches of the regular expression in the input string. The last parameter n determines the number of substrings to return, where -1 means return all matches

regexFindAll "[2,4,6,8]" "123456789" -1

The above produces [2 4 6 8]

regexFindAll panics if there is a problem and mustRegexFindAll returns an error to the template engine if there is a problem.

regexFind, mustRegexFind

Return the first (left most) match of the regular expression in the input string

regexFind "[a-zA-Z][1-9]" "abcd1234"

The above produces d1

regexFind panics if there is a problem and mustRegexFind returns an error to the template engine if there is a problem.

regexReplaceAll, mustRegexReplaceAll

Returns a copy of the input string, replacing matches of the Regexp with the replacement string replacement. Inside string replacement, $ signs are interpreted as in Expand, so for instance $1 represents the text of the first submatch

regexReplaceAll "a(x*)b" "-ab-axxb-" "${1}W"

The above produces -W-xxW-

regexReplaceAll panics if there is a problem and mustRegexReplaceAll returns an error to the template engine if there is a problem.

regexReplaceAllLiteral, mustRegexReplaceAllLiteral

Returns a copy of the input string, replacing matches of the Regexp with the replacement string replacement The replacement string is substituted directly, without using Expand

regexReplaceAllLiteral "a(x*)b" "-ab-axxb-" "${1}"

The above produces -${1}-${1}-

regexReplaceAllLiteral panics if there is a problem and mustRegexReplaceAllLiteral returns an error to the template engine if there is a problem.

regexSplit, mustRegexSplit

Slices the input string into substrings separated by the expression and returns a slice of the substrings between those expression matches. The last parameter n determines the number of substrings to return, where -1 means return all matches

regexSplit "z+" "pizza" -1

The above produces [pi a]

regexSplit panics if there is a problem and mustRegexSplit returns an error to the template engine if there is a problem.

regexQuoteMeta

Returns a string that escapes all regular expression metacharacters inside the argument text; the returned string is a regular expression matching the literal text.

regexQuoteMeta "1.2.3"

The above produces 1\.2\.3

See Also...

The Conversion Functions contain functions for converting strings. The String List Functions contains functions for working with an array of strings.

String List Functions

These functions operate on or generate slices of strings. In Go, a slice is a growable array. In Sprig, it's a special case of a list.

join

Join a list of strings into a single string, with the given separator.

list "hello" "world" | join "_"

The above will produce hello_world

join will try to convert non-strings to a string value:

list 1 2 3 | join "+"

The above will produce 1+2+3

splitList and split

Split a string into a list of strings:

splitList "$" "foo$bar$baz"

The above will return [foo bar baz]

The older split function splits a string into a dict. It is designed to make it easy to use template dot notation for accessing members:

$a := split "$" "foo$bar$baz"

The above produces a map with index keys. {_0: foo, _1: bar, _2: baz}

$a._0

The above produces foo

splitn

splitn function splits a string into a dict with n keys. It is designed to make it easy to use template dot notation for accessing members:

$a := splitn "$" 2 "foo$bar$baz"

The above produces a map with index keys. {_0: foo, _1: bar$baz}

$a._0

The above produces foo

sortAlpha

The sortAlpha function sorts a list of strings into alphabetical (lexicographical) order.

It does not sort in place, but returns a sorted copy of the list, in keeping with the immutability of lists.

Integer Math Functions

The following math functions operate on int64 values.

add

Sum numbers with add. Accepts two or more inputs.

add 1 2 3

add1

To increment by 1, use add1

sub

To subtract, use sub

div

Perform integer division with div

mod

Modulo with mod

mul

Multiply with mul. Accepts two or more inputs.

mul 1 2 3

max

Return the largest of a series of integers:

This will return 3:

max 1 2 3

min

Return the smallest of a series of integers.

min 1 2 3 will return 1

floor

Returns the greatest float value less than or equal to input value

floor 123.9999 will return 123.0

ceil

Returns the greatest float value greater than or equal to input value

ceil 123.001 will return 124.0

round

Returns a float value with the remainder rounded to the given number to digits after the decimal point.

round 123.555555 3 will return 123.556

randInt

Returns a random integer value from min (inclusive) to max (exclusive).

randInt 12 30

The above will produce a random number in the range [12,30].

Integer List Functions

until

The until function builds a range of integers.

until 5

The above generates the list [0, 1, 2, 3, 4].

This is useful for looping with range $i, $e := until 5.

untilStep

Like until, untilStep generates a list of counting integers. But it allows you to define a start, stop, and step:

untilStep 3 6 2

The above will produce [3 5] by starting with 3, and adding 2 until it is equal or greater than 6. This is similar to Python's range function.

seq

Works like the bash seq command.

• 1 parameter (end) - will generate all counting integers between 1 and end inclusive.
• 2 parameters (start, end) - will generate all counting integers between start and end inclusive incrementing or decrementing by 1.
• 3 parameters (start, step, end) - will generate all counting integers between start and end inclusive incrementing or decrementing by step.

seq 5       => 1 2 3 4 5
seq -3      => 1 0 -1 -2 -3
seq 0 2     => 0 1 2
seq 2 -2    => 2 1 0 -1 -2
seq 0 2 10  => 0 2 4 6 8 10
seq 0 -2 -5 => 0 -2 -4

Float Math Functions

maxf

Return the largest of a series of floats:

This will return 3:

maxf 1 2.5 3

minf

Return the smallest of a series of floats.

This will return 1.5:

minf 1.5 2 3

Date Functions

now

The current date/time. Use this in conjunction with other date functions.

ago

The ago function returns duration from time.Now in seconds resolution.

ago .CreatedAt

returns in time.Duration String() format

2h34m7s

date

The date function formats a date.

Format the date to YEAR-MONTH-DAY:

now | date "2006-01-02"

Date formatting in Go is a little bit different.

In short, take this as the base date:

Mon Jan 2 15:04:05 MST 2006

Write it in the format you want. Above, 2006-01-02 is the same date, but in the format we want.

dateInZone

Same as date, but with a timezone.

dateInZone "2006-01-02" (now) "UTC"

duration

Formats a given amount of seconds as a time.Duration.

This returns 1m35s

duration "95"

durationRound

Rounds a given duration to the most significant unit. Strings and time.Duration gets parsed as a duration, while a time.Time is calculated as the duration since.

This return 2h

durationRound "2h10m5s"

This returns 3mo

durationRound "2400h10m5s"

unixEpoch

Returns the seconds since the unix epoch for a time.Time.

now | unixEpoch

dateModify, mustDateModify

The dateModify takes a modification and a date and returns the timestamp.

Subtract an hour and thirty minutes from the current time:

now | dateModify "-1.5h"

If the modification format is wrong dateModify will return the date unmodified. mustDateModify will return an error otherwise.

htmlDate

The htmlDate function formats a date for inserting into an HTML date picker input field.

now | htmlDate

htmlDateInZone

Same as htmlDate, but with a timezone.

htmlDateInZone (now) "UTC"

toDate, mustToDate

toDate converts a string to a date. The first argument is the date layout and the second the date string. If the string can't be convert it returns the zero value. mustToDate will return an error in case the string cannot be converted.

This is useful when you want to convert a string date to another format (using pipe). The example below converts "2017-12-31" to "31/12/2017".

toDate "2006-01-02" "2017-12-31" | date "02/01/2006"

Default Functions

Sprig provides tools for setting default values for templates.

default

To set a simple default value, use default:

default "foo" .Bar

In the above, if .Bar evaluates to a non-empty value, it will be used. But if it is empty, foo will be returned instead.

The definition of "empty" depends on type:

• Numeric: 0
• String: ""
• Lists: []
• Dicts: {}
• Boolean: false
• And always nil (aka null)

For structs, there is no definition of empty, so a struct will never return the default.

empty

The empty function returns true if the given value is considered empty, and false otherwise. The empty values are listed in the default section.

empty .Foo

Note that in Go template conditionals, emptiness is calculated for you. Thus, you rarely need if empty .Foo. Instead, just use if .Foo.

coalesce

The coalesce function takes a list of values and returns the first non-empty one.

coalesce 0 1 2

The above returns 1.

This function is useful for scanning through multiple variables or values:

coalesce .name .parent.name "Matt"

The above will first check to see if .name is empty. If it is not, it will return that value. If it is empty, coalesce will evaluate .parent.name for emptiness. Finally, if both .name and .parent.name are empty, it will return Matt.

all

The all function takes a list of values and returns true if all values are non-empty.

all 0 1 2

The above returns false.

This function is useful for evaluating multiple conditions of variables or values:

all (eq .Request.TLS.Version 0x0304) (.Request.ProtoAtLeast 2 0) (eq .Request.Method "POST")

The above will check http.Request is POST with tls 1.3 and http/2.

any

The any function takes a list of values and returns true if any value is non-empty.

any 0 1 2

The above returns true.

This function is useful for evaluating multiple conditions of variables or values:

any (eq .Request.Method "GET") (eq .Request.Method "POST") (eq .Request.Method "OPTIONS")

The above will check http.Request method is one of GET/POST/OPTIONS.

fromJSON, mustFromJSON

fromJSON decodes a JSON document into a structure. If the input cannot be decoded as JSON the function will return an empty string. mustFromJSON will return an error in case the JSON is invalid.

fromJSON "{\"foo\": 55}"

toJSON, mustToJSON

The toJSON function encodes an item into a JSON string. If the item cannot be converted to JSON the function will return an empty string. mustToJSON will return an error in case the item cannot be encoded in JSON.

toJSON .Item

The above returns JSON string representation of .Item.

toPrettyJSON, mustToPrettyJSON

The toPrettyJSON function encodes an item into a pretty (indented) JSON string.

toPrettyJSON .Item

The above returns indented JSON string representation of .Item.

toRawJSON, mustToRawJSON

The toRawJSON function encodes an item into JSON string with HTML characters unescaped.

toRawJSON .Item

The above returns unescaped JSON string representation of .Item.

ternary

The ternary function takes two values, and a test value. If the test value is true, the first value will be returned. If the test value is empty, the second value will be returned. This is similar to the c ternary operator.

true test value

ternary "foo" "bar" true

or

true | ternary "foo" "bar"

The above returns "foo".

false test value

ternary "foo" "bar" false

or

false | ternary "foo" "bar"

The above returns "bar".

Encoding Functions

Sprig has the following encoding and decoding functions:

• b64enc/b64dec: Encode or decode with Base64
• b32enc/b32dec: Encode or decode with Base32

Lists and List Functions

Sprig provides a simple list type that can contain arbitrary sequential lists of data. This is similar to arrays or slices, but lists are designed to be used as immutable data types.

Create a list of integers:

$myList := list 1 2 3 4 5

The above creates a list of [1 2 3 4 5].

first, mustFirst

To get the head item on a list, use first.

first $myList returns 1

first panics if there is a problem while mustFirst returns an error to the template engine if there is a problem.

rest, mustRest

To get the tail of the list (everything but the first item), use rest.

rest $myList returns [2 3 4 5]

rest panics if there is a problem while mustRest returns an error to the template engine if there is a problem.

last, mustLast

To get the last item on a list, use last:

last $myList returns 5. This is roughly analogous to reversing a list and then calling first.

last panics if there is a problem while mustLast returns an error to the template engine if there is a problem.

initial, mustInitial

This compliments last by returning all but the last element. initial $myList returns [1 2 3 4].

initial panics if there is a problem while mustInitial returns an error to the template engine if there is a problem.

append, mustAppend

Append a new item to an existing list, creating a new list.

$new = append $myList 6

The above would set $new to [1 2 3 4 5 6]. $myList would remain unaltered.

append panics if there is a problem while mustAppend returns an error to the template engine if there is a problem.

prepend, mustPrepend

Push an element onto the front of a list, creating a new list.

prepend $myList 0

The above would produce [0 1 2 3 4 5]. $myList would remain unaltered.

prepend panics if there is a problem while mustPrepend returns an error to the template engine if there is a problem.

concat

Concatenate arbitrary number of lists into one.

concat $myList ( list 6 7 ) ( list 8 )

The above would produce [1 2 3 4 5 6 7 8]. $myList would remain unaltered.

reverse, mustReverse

Produce a new list with the reversed elements of the given list.

reverse $myList

The above would generate the list [5 4 3 2 1].

reverse panics if there is a problem while mustReverse returns an error to the template engine if there is a problem.

uniq, mustUniq

Generate a list with all of the duplicates removed.

list 1 1 1 2 | uniq

The above would produce [1 2]

uniq panics if there is a problem while mustUniq returns an error to the template engine if there is a problem.

without, mustWithout

The without function filters items out of a list.

without $myList 3

The above would produce [1 2 4 5]

Without can take more than one filter:

without $myList 1 3 5

That would produce [2 4]

without panics if there is a problem while mustWithout returns an error to the template engine if there is a problem.

has, mustHas

Test to see if a list has a particular element.

has 4 $myList

The above would return true, while has "hello" $myList would return false.

has panics if there is a problem while mustHas returns an error to the template engine if there is a problem.

compact, mustCompact

Accepts a list and removes entries with empty values.

$list := list 1 "a" "foo" ""
$copy := compact $list

compact will return a new list with the empty (i.e., "") item removed.

compact panics if there is a problem and mustCompact returns an error to the template engine if there is a problem.

slice, mustSlice

To get partial elements of a list, use slice list [n] [m]. It is equivalent of list[n:m].

• slice $myList returns [1 2 3 4 5]. It is same as myList[:].
• slice $myList 3 returns [4 5]. It is same as myList[3:].
• slice $myList 1 3 returns [2 3]. It is same as myList[1:3].
• slice $myList 0 3 returns [1 2 3]. It is same as myList[:3].

slice panics if there is a problem while mustSlice returns an error to the template engine if there is a problem.

chunk

To split a list into chunks of given size, use chunk size list. This is useful for pagination.

chunk 3 (list 1 2 3 4 5 6 7 8)

This produces list of lists [ [ 1 2 3 ] [ 4 5 6 ] [ 7 8 ] ].

A Note on List Internals

A list is implemented in Go as a []any. For Go developers embedding Sprig, you may pass []any items into your template context and be able to use all of the list functions on those items.

Dictionaries and Dict Functions

Sprig provides a key/value storage type called a dict (short for "dictionary", as in Python). A dict is an unorder type.

The key to a dictionary must be a string. However, the value can be any type, even another dict or list.

Unlike lists, dicts are not immutable. The set and unset functions will modify the contents of a dictionary.

dict

Creating dictionaries is done by calling the dict function and passing it a list of pairs.

The following creates a dictionary with three items:

$myDict := dict "name1" "value1" "name2" "value2" "name3" "value 3"

get

Given a map and a key, get the value from the map.

get $myDict "name1"

The above returns "value1"

Note that if the key is not found, this operation will simply return "". No error will be generated.

set

Use set to add a new key/value pair to a dictionary.

$_ := set $myDict "name4" "value4"

Note that set returns the dictionary (a requirement of Go template functions), so you may need to trap the value as done above with the $_ assignment.

unset

Given a map and a key, delete the key from the map.

$_ := unset $myDict "name4"

As with set, this returns the dictionary.

Note that if the key is not found, this operation will simply return. No error will be generated.

hasKey

The hasKey function returns true if the given dict contains the given key.

hasKey $myDict "name1"

If the key is not found, this returns false.

pluck

The pluck function makes it possible to give one key and multiple maps, and get a list of all of the matches:

pluck "name1" $myDict $myOtherDict

The above will return a list containing every found value ([value1 otherValue1]).

If the give key is not found in a map, that map will not have an item in the list (and the length of the returned list will be less than the number of dicts in the call to pluck.

If the key is found but the value is an empty value, that value will be inserted.

A common idiom in Sprig templates is to uses pluck... | first to get the first matching key out of a collection of dictionaries.

dig

The dig function traverses a nested set of dicts, selecting keys from a list of values. It returns a default value if any of the keys are not found at the associated dict.

dig "user" "role" "humanName" "guest" $dict

Given a dict structured like

{
  user: {
    role: {
      humanName: "curator"
    }
  }
}

the above would return "curator". If the dict lacked even a user field, the result would be "guest".

Dig can be very useful in cases where you'd like to avoid guard clauses, especially since Go's template package's and doesn't shortcut. For instance and a.maybeNil a.maybeNil.iNeedThis will always evaluate a.maybeNil.iNeedThis, and panic if a lacks a maybeNil field.)

dig accepts its dict argument last in order to support pipelining.

keys

The keys function will return a list of all of the keys in one or more dict types. Since a dictionary is unordered, the keys will not be in a predictable order. They can be sorted with sortAlpha.

keys $myDict | sortAlpha

When supplying multiple dictionaries, the keys will be concatenated. Use the uniq function along with sortAlpha to get a unqiue, sorted list of keys.

keys $myDict $myOtherDict | uniq | sortAlpha

pick

The pick function selects just the given keys out of a dictionary, creating a new dict.

$new := pick $myDict "name1" "name2"

The above returns {name1: value1, name2: value2}

omit

The omit function is similar to pick, except it returns a new dict with all the keys that do not match the given keys.

$new := omit $myDict "name1" "name3"

The above returns {name2: value2}

values

The values function is similar to keys, except it returns a new list with all the values of the source dict (only one dictionary is supported).

$vals := values $myDict

The above returns list["value1", "value2", "value 3"]. Note that the values function gives no guarantees about the result ordering- if you care about this, then use sortAlpha.

Type Conversion Functions

The following type conversion functions are provided by Sprig:

• atoi: Convert a string to an integer.
• float64: Convert to a float64.
• int: Convert to an int at the system's width.
• int64: Convert to an int64.
• toDecimal: Convert a unix octal to a int64.
• toString: Convert to a string.
• toStrings: Convert a list, slice, or array to a list of strings.

Only atoi requires that the input be a specific type. The others will attempt to convert from any type to the destination type. For example, int64 can convert floats to ints, and it can also convert strings to ints.

toStrings

Given a list-like collection, produce a slice of strings.

list 1 2 3 | toStrings

The above converts 1 to "1", 2 to "2", and so on, and then returns them as a list.

toDecimal

Given a unix octal permission, produce a decimal.

"0777" | toDecimal

The above converts 0777 to 511 and returns the value as an int64.

Path and Filepath Functions

While Sprig does not grant access to the filesystem, it does provide functions for working with strings that follow file path conventions.

Paths

Paths separated by the slash character (/), processed by the path package.

Examples:

• The Linux and MacOS filesystems: /home/user/file, /etc/config;
• The path component of URIs: https://example.com/some/content/, ftp://example.com/file/.

base

Return the last element of a path.

base "foo/bar/baz"

The above prints "baz".

dir

Return the directory, stripping the last part of the path. So dir "foo/bar/baz" returns foo/bar.

clean

Clean up a path.

clean "foo/bar/../baz"

The above resolves the .. and returns foo/baz.

ext

Return the file extension.

ext "foo.bar"

The above returns .bar.

isAbs

To check whether a path is absolute, use isAbs.

Filepaths

Paths separated by the os.PathSeparator variable, processed by the path/filepath package.

These are the recommended functions to use when parsing paths of local filesystems, usually when dealing with local files, directories, etc.

Examples:

• Running on Linux or MacOS the filesystem path is separated by the slash character (/): /home/user/file, /etc/config;
• Running on Windows the filesystem path is separated by the backslash character (\): C:\Users\Username\, C:\Program Files\Application\;

osBase

Return the last element of a filepath.

osBase "/foo/bar/baz"
osBase "C:\\foo\\bar\\baz"

The above prints "baz" on Linux and Windows, respectively.

osDir

Return the directory, stripping the last part of the path. So osDir "/foo/bar/baz" returns /foo/bar on Linux, and osDir "C:\\foo\\bar\\baz" returns C:\\foo\\bar on Windows.

osClean

Clean up a path.

osClean "/foo/bar/../baz"
osClean "C:\\foo\\bar\\..\\baz"

The above resolves the .. and returns foo/baz on Linux and C:\\foo\\baz on Windows.

osExt

Return the file extension.

osExt "/foo.bar"
osExt "C:\\foo.bar"

The above returns .bar on Linux and Windows, respectively.

osIsAbs

To check whether a file path is absolute, use osIsAbs.

Flow Control Functions

fail

Unconditionally returns an empty string and an error with the specified text. This is useful in scenarios where other conditionals have determined that template rendering should fail.

fail "Please accept the end user license agreement"

Reflection Functions

Sprig provides rudimentary reflection tools. These help advanced template developers understand the underlying Go type information for a particular value.

Go has several primitive kinds, like string, slice, int64, and bool.

Go has an open type system that allows developers to create their own types.

Sprig provides a set of functions for each.

Kind Functions

There are two Kind functions: kindOf returns the kind of an object.

kindOf "hello"

The above would return string. For simple tests (like in if blocks), the kindIs function will let you verify that a value is a particular kind:

kindIs "int" 123

The above will return true

Type Functions

Types are slightly harder to work with, so there are three different functions:

• typeOf returns the underlying type of a value: typeOf $foo
• typeIs is like kindIs, but for types: typeIs "*io.Buffer" $myVal
• typeIsLike works as typeIs, except that it also dereferences pointers.

Note: None of these can test whether or not something implements a given interface, since doing so would require compiling the interface in ahead of time.

deepEqual

deepEqual returns true if two values are "deeply equal"

Works for non-primitive types as well (compared to the built-in eq).

deepEqual (list 1 2 3) (list 1 2 3)

The above will return true

Cryptographic and Security Functions

Sprig provides a couple of advanced cryptographic functions.

sha1sum

The sha1sum function receives a string, and computes it's SHA1 digest.

sha1sum "Hello world!"

sha256sum

The sha256sum function receives a string, and computes it's SHA256 digest.

sha256sum "Hello world!"

The above will compute the SHA 256 sum in an "ASCII armored" format that is safe to print.

sha512sum

The sha512sum function receives a string, and computes it's SHA512 digest.

sha512sum "Hello world!"

The above will compute the SHA 512 sum in an "ASCII armored" format that is safe to print.

adler32sum

The adler32sum function receives a string, and computes its Adler-32 checksum.

adler32sum "Hello world!"

URL Functions

urlParse

Parses string for URL and produces dict with URL parts

urlParse "http://admin:secret@server.com:8080/api?list=false#anchor"

The above returns a dict, containing URL object:

scheme:   'http'
host:     'server.com:8080'
path:     '/api'
query:    'list=false'
opaque:   nil
fragment: 'anchor'
userinfo: 'admin:secret'

For more info, check https://golang.org/pkg/net/url/#URL

urlJoin

Joins map (produced by urlParse) to produce URL string

urlJoin (dict "fragment" "fragment" "host" "host:80" "path" "/path" "query" "query" "scheme" "http")

The above returns the following string:

proto://host:80/path?query#fragment