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Refactor expression evaluator to use parser from actionlint package #908

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merged 5 commits into from
Jan 21, 2022
Merged

Refactor expression evaluator to use parser from actionlint package #908

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f015e81
feat: implement expression evaluator
ZauberNerd Nov 26, 2021
78d834b
feat: integrate exprparser into act
ZauberNerd Nov 29, 2021
8f9b9c8
Escape { and }, do not fail on missing properties
ChristopherHX Dec 22, 2021
6013c54
Fix empty inputs context
ChristopherHX Dec 22, 2021
73cf7e3
fix: contains() comparison for complex values
ZauberNerd Jan 4, 2022
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5 changes: 1 addition & 4 deletions go.mod
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,6 @@ require (
github.com/julienschmidt/httprouter v1.3.0
github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
github.com/kevinburke/ssh_config v1.1.0 // indirect
github.com/mattn/go-colorable v0.1.9 // indirect
github.com/mattn/go-isatty v0.0.14
github.com/mgutz/ansi v0.0.0-20200706080929-d51e80ef957d // indirect
github.com/mitchellh/go-homedir v1.1.0
Expand All @@ -31,7 +30,7 @@ require (
github.com/opencontainers/runc v1.0.2 // indirect
github.com/opencontainers/selinux v1.10.0
github.com/pkg/errors v0.9.1
github.com/robertkrimen/otto v0.0.0-20210614181706-373ff5438452
github.com/rhysd/actionlint v1.6.8
github.com/sabhiram/go-gitignore v0.0.0-20201211210132-54b8a0bf510f
github.com/sergi/go-diff v1.2.0 // indirect
github.com/sirupsen/logrus v1.8.1
Expand All @@ -41,10 +40,8 @@ require (
github.com/xanzy/ssh-agent v0.3.1 // indirect
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 // indirect
golang.org/x/net v0.0.0-20210917221730-978cfadd31cf // indirect
golang.org/x/sys v0.0.0-20210923061019-b8560ed6a9b7 // indirect
golang.org/x/term v0.0.0-20210916214954-140adaaadfaf
golang.org/x/text v0.3.7 // indirect
google.golang.org/genproto v0.0.0-20210921142501-181ce0d877f6 // indirect
gopkg.in/sourcemap.v1 v1.0.5 // indirect
gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
)
25 changes: 18 additions & 7 deletions go.sum
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -425,6 +425,7 @@ github.com/docker/spdystream v0.0.0-20160310174837-449fdfce4d96/go.mod h1:Qh8CwZ
github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=
github.com/dustin/go-humanize v0.0.0-20171111073723-bb3d318650d4/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
github.com/dvyukov/go-fuzz v0.0.0-20210914135545-4980593459a1/go.mod h1:11Gm+ccJnvAhCNLlf5+cS9KjtbaD5I5zaZpFMsTHWTw=
github.com/eapache/go-resiliency v1.1.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5mFgVsvEsIPBvNs=
github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
Expand All @@ -446,6 +447,8 @@ github.com/evanphx/json-patch v4.2.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLi
github.com/evanphx/json-patch v4.9.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
github.com/fatih/color v1.9.0/go.mod h1:eQcE1qtQxscV5RaZvpXrrb8Drkc3/DdQ+uUYCNjL+zU=
github.com/fatih/color v1.13.0 h1:8LOYc1KYPPmyKMuN8QV2DNRWNbLo6LZ0iLs8+mlH53w=
github.com/fatih/color v1.13.0/go.mod h1:kLAiJbzzSOZDVNGyDpeOxJ47H46qBXwg5ILebYFFOfk=
github.com/felixge/httpsnoop v1.0.2/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:xEzjJPgXI435gkrCt3MPfRiAkVrwSbHsst4LCFVfpJc=
github.com/form3tech-oss/jwt-go v3.2.2+incompatible/go.mod h1:pbq4aXjuKjdthFRnoDwaVPLA+WlJuPGy+QneDUgJi2k=
Expand Down Expand Up @@ -825,8 +828,9 @@ github.com/mattn/go-colorable v0.1.1/go.mod h1:FuOcm+DKB9mbwrcAfNl7/TZVBZ6rcncea
github.com/mattn/go-colorable v0.1.2/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
github.com/mattn/go-colorable v0.1.6/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
github.com/mattn/go-colorable v0.1.9 h1:sqDoxXbdeALODt0DAeJCVp38ps9ZogZEAXjus69YV3U=
github.com/mattn/go-colorable v0.1.9/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
github.com/mattn/go-colorable v0.1.11 h1:nQ+aFkoE2TMGc0b68U2OKSexC+eq46+XwZzWXHRmPYs=
github.com/mattn/go-colorable v0.1.11/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb520KVy5xxl4=
github.com/mattn/go-ieproxy v0.0.0-20190610004146-91bb50d98149/go.mod h1:31jz6HNzdxOmlERGGEc4v/dMssOfmp2p5bT/okiKFFc=
github.com/mattn/go-ieproxy v0.0.0-20190702010315-6dee0af9227d/go.mod h1:31jz6HNzdxOmlERGGEc4v/dMssOfmp2p5bT/okiKFFc=
github.com/mattn/go-ieproxy v0.0.1/go.mod h1:pYabZ6IHcRpFh7vIaLfK7rdcWgFEb3SFJ6/gNWuh88E=
Expand All @@ -839,6 +843,8 @@ github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Ky
github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
github.com/mattn/go-runewidth v0.0.2/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
github.com/mattn/go-runewidth v0.0.13 h1:lTGmDsbAYt5DmK6OnoV7EuIF1wEIFAcxld6ypU4OSgU=
github.com/mattn/go-runewidth v0.0.13/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
github.com/mattn/go-shellwords v1.0.3/go.mod h1:3xCvwCdWdlDJUrvuMn7Wuy9eWs4pE8vqg+NOMyg4B2o=
github.com/mattn/go-shellwords v1.0.10/go.mod h1:EZzvwXDESEeg03EKmM+RmDnNOPKG4lLtQsUlTZDWQ8Y=
github.com/mattn/go-sqlite3 v1.9.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
Expand Down Expand Up @@ -1027,8 +1033,12 @@ github.com/quasilyte/go-consistent v0.0.0-20190521200055-c6f3937de18c/go.mod h1:
github.com/quasilyte/go-ruleguard v0.1.2-0.20200318202121-b00d7a75d3d8/go.mod h1:CGFX09Ci3pq9QZdj86B+VGIdNj4VyCo2iPOGS9esB/k=
github.com/rcrowley/go-metrics v0.0.0-20181016184325-3113b8401b8a/go.mod h1:bCqnVzQkZxMG4s8nGwiZ5l3QUCyqpo9Y+/ZMZ9VjZe4=
github.com/remyoudompheng/bigfft v0.0.0-20170806203942-52369c62f446/go.mod h1:uYEyJGbgTkfkS4+E/PavXkNJcbFIpEtjt2B0KDQ5+9M=
github.com/robertkrimen/otto v0.0.0-20210614181706-373ff5438452 h1:ewTtJ72GFy2e0e8uyiDwMG3pKCS5mBh+hdSTYsPKEP8=
github.com/robertkrimen/otto v0.0.0-20210614181706-373ff5438452/go.mod h1:xvqspoSXJTIpemEonrMDFq6XzwHYYgToXWj5eRX1OtY=
github.com/rhysd/actionlint v1.6.8 h1:li0691FNuuS3da2igfjMb9M58AgMXX7j9U5EgbCZFuc=
github.com/rhysd/actionlint v1.6.8/go.mod h1:0AA4pvZ2nrZHT6D86eUhieH2NFmLqhxrNex0NEa2A2g=
github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
github.com/robfig/cron v1.2.0 h1:ZjScXvvxeQ63Dbyxy76Fj3AT3Ut0aKsyd2/tl3DTMuQ=
github.com/robfig/cron v1.2.0/go.mod h1:JGuDeoQd7Z6yL4zQhZ3OPEVHB7fL6Ka6skscFHfmt2k=
github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
github.com/rogpeppe/fastuuid v1.1.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
Expand Down Expand Up @@ -1189,6 +1199,7 @@ github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9de
github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
github.com/yvasiyarov/go-metrics v0.0.0-20140926110328-57bccd1ccd43/go.mod h1:aX5oPXxHm3bOH+xeAttToC8pqch2ScQN/JoXYupl6xs=
github.com/yvasiyarov/gorelic v0.0.0-20141212073537-a9bba5b9ab50/go.mod h1:NUSPSUX/bi6SeDMUh6brw0nXpxHnc96TguQh0+r/ssA=
github.com/yvasiyarov/newrelic_platform_go v0.0.0-20140908184405-b21fdbd4370f/go.mod h1:GlGEuHIJweS1mbCqG+7vt2nvWLzLLnRHbXz5JKd/Qbg=
Expand Down Expand Up @@ -1395,6 +1406,7 @@ golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJ
golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20170830134202-bb24a47a89ea/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
Expand Down Expand Up @@ -1494,8 +1506,9 @@ golang.org/x/sys v0.0.0-20210502180810-71e4cd670f79/go.mod h1:h1NjWce9XRLGQEsW7w
golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210923061019-b8560ed6a9b7 h1:c20P3CcPbopVp2f7099WLOqSNKURf30Z0uq66HpijZY=
golang.org/x/sys v0.0.0-20210923061019-b8560ed6a9b7/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211113001501-0c823b97ae02 h1:7NCfEGl0sfUojmX78nK9pBJuUlSZWEJA/TwASvfiPLo=
golang.org/x/sys v0.0.0-20211113001501-0c823b97ae02/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20210503060354-a79de5458b56/go.mod h1:tfny5GFUkzUvx4ps4ajbZsCe5lw1metzhBm9T3x7oIY=
Expand Down Expand Up @@ -1767,8 +1780,6 @@ gopkg.in/ini.v1 v1.56.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
gopkg.in/ini.v1 v1.62.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
gopkg.in/natefinch/lumberjack.v2 v2.0.0/go.mod h1:l0ndWWf7gzL7RNwBG7wST/UCcT4T24xpD6X8LsfU/+k=
gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
gopkg.in/sourcemap.v1 v1.0.5 h1:inv58fC9f9J3TK2Y2R1NPntXEn3/wjWHkonhIUODNTI=
gopkg.in/sourcemap.v1 v1.0.5/go.mod h1:2RlvNNSMglmRrcvhfuzp4hQHwOtjxlbjX7UPY/GXb78=
gopkg.in/square/go-jose.v2 v2.2.2/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
gopkg.in/square/go-jose.v2 v2.3.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
gopkg.in/square/go-jose.v2 v2.5.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
Expand Down
277 changes: 277 additions & 0 deletions pkg/exprparser/functions.go
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,277 @@
package exprparser

import (
"crypto/sha256"
"encoding/hex"
"encoding/json"
"fmt"
"io"
"os"
"path/filepath"
"reflect"
"strconv"
"strings"

"github.com/nektos/act/pkg/model"
"github.com/rhysd/actionlint"
)

func (impl *interperterImpl) contains(search, item reflect.Value) (bool, error) {
switch search.Kind() {
case reflect.String, reflect.Int, reflect.Float64, reflect.Bool, reflect.Invalid:
return strings.Contains(
strings.ToLower(impl.coerceToString(search).String()),
strings.ToLower(impl.coerceToString(item).String()),
), nil

case reflect.Slice:
for i := 0; i < search.Len(); i++ {
arrayItem := search.Index(i).Elem()
result, err := impl.compareValues(arrayItem, item, actionlint.CompareOpNodeKindEq)
if err != nil {
return false, err
}

if isEqual, ok := result.(bool); ok && isEqual {
return true, nil
}
}
}

return false, nil
}

func (impl *interperterImpl) startsWith(searchString, searchValue reflect.Value) (bool, error) {
return strings.HasPrefix(
strings.ToLower(impl.coerceToString(searchString).String()),
strings.ToLower(impl.coerceToString(searchValue).String()),
), nil
}

func (impl *interperterImpl) endsWith(searchString, searchValue reflect.Value) (bool, error) {
return strings.HasSuffix(
strings.ToLower(impl.coerceToString(searchString).String()),
strings.ToLower(impl.coerceToString(searchValue).String()),
), nil
}

const (
passThrough = iota
bracketOpen
bracketClose
)

func (impl *interperterImpl) format(str reflect.Value, replaceValue ...reflect.Value) (string, error) {
input := impl.coerceToString(str).String()
output := ""
replacementIndex := ""

state := passThrough
for _, character := range input {
switch state {
case passThrough: // normal buffer output
switch character {
case '{':
state = bracketOpen

case '}':
state = bracketClose

default:
output += string(character)
}

case bracketOpen: // found {
switch character {
case '{':
output += "{"
replacementIndex = ""
state = passThrough

case '}':
index, err := strconv.ParseInt(replacementIndex, 10, 32)
if err != nil {
return "", fmt.Errorf("The following format string is invalid: '%s'", input)
}

replacementIndex = ""

if len(replaceValue) <= int(index) {
return "", fmt.Errorf("The following format string references more arguments than were supplied: '%s'", input)
}

output += impl.coerceToString(replaceValue[index]).String()

state = passThrough

default:
replacementIndex += string(character)
}

case bracketClose: // found }
switch character {
case '}':
output += "}"
replacementIndex = ""
state = passThrough

default:
panic("Invalid format parser state")
}
}
}

if state != passThrough {
switch state {
case bracketOpen:
return "", fmt.Errorf("Unclosed brackets. The following format string is invalid: '%s'", input)

case bracketClose:
return "", fmt.Errorf("Closing bracket without opening one. The following format string is invalid: '%s'", input)
}
}

return output, nil
}

func (impl *interperterImpl) join(array reflect.Value, sep reflect.Value) (string, error) {
separator := impl.coerceToString(sep).String()
switch array.Kind() {
case reflect.Slice:
var items []string
for i := 0; i < array.Len(); i++ {
items = append(items, impl.coerceToString(array.Index(i).Elem()).String())
}

return strings.Join(items, separator), nil
default:
return strings.Join([]string{impl.coerceToString(array).String()}, separator), nil
}
}

func (impl *interperterImpl) toJSON(value reflect.Value) (string, error) {
if value.Kind() == reflect.Invalid {
return "", nil
}

json, err := json.MarshalIndent(value.Interface(), "", " ")
if err != nil {
return "", fmt.Errorf("Cannot convert value to JSON. Cause: %v", err)
}

return string(json), nil
}

func (impl *interperterImpl) fromJSON(value reflect.Value) (interface{}, error) {
if value.Kind() != reflect.String {
return nil, fmt.Errorf("Cannot parse non-string type %v as JSON", value.Kind())
}

var data interface{}

err := json.Unmarshal([]byte(value.String()), &data)
if err != nil {
return nil, fmt.Errorf("Invalid JSON: %v", err)
}

return data, nil
}

func (impl *interperterImpl) hashFiles(paths ...reflect.Value) (string, error) {
var filepaths []string

for _, path := range paths {
if path.Kind() == reflect.String {
filepaths = append(filepaths, path.String())
} else {
return "", fmt.Errorf("Non-string path passed to hashFiles")
}
}

var files []string

for i := range filepaths {
newFiles, err := filepath.Glob(filepath.Join(impl.config.WorkingDir, filepaths[i]))
if err != nil {
return "", fmt.Errorf("Unable to glob.Glob: %v", err)
}

files = append(files, newFiles...)
}

if len(files) == 0 {
return "", nil
}

hasher := sha256.New()

for _, file := range files {
f, err := os.Open(file)
if err != nil {
return "", fmt.Errorf("Unable to os.Open: %v", err)
}

if _, err := io.Copy(hasher, f); err != nil {
return "", fmt.Errorf("Unable to io.Copy: %v", err)
}

if err := f.Close(); err != nil {
return "", fmt.Errorf("Unable to Close file: %v", err)
}
}

return hex.EncodeToString(hasher.Sum(nil)), nil
}

func (impl *interperterImpl) getNeedsTransitive(job *model.Job) []string {
needs := job.Needs()

for _, need := range needs {
parentNeeds := impl.getNeedsTransitive(impl.config.Run.Workflow.GetJob(need))
needs = append(needs, parentNeeds...)
}

return needs
}

func (impl *interperterImpl) always() (bool, error) {
return true, nil
}

func (impl *interperterImpl) jobSuccess() (bool, error) {
jobs := impl.config.Run.Workflow.Jobs
jobNeeds := impl.getNeedsTransitive(impl.config.Run.Job())

for _, needs := range jobNeeds {
if jobs[needs].Result != "success" {
return false, nil
}
}

return true, nil
}

func (impl *interperterImpl) stepSuccess() (bool, error) {
return impl.env.Job.Status == "success", nil
}

func (impl *interperterImpl) jobFailure() (bool, error) {
jobs := impl.config.Run.Workflow.Jobs
jobNeeds := impl.getNeedsTransitive(impl.config.Run.Job())

for _, needs := range jobNeeds {
if jobs[needs].Result == "failure" {
return true, nil
}
}

return false, nil
}

func (impl *interperterImpl) stepFailure() (bool, error) {
return impl.env.Job.Status == "failure", nil
}

func (impl *interperterImpl) cancelled() (bool, error) {
return impl.env.Job.Status == "cancelled", nil
}
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