mirror of
https://github.com/woodpecker-ci/woodpecker.git
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135 lines
3 KiB
Go
135 lines
3 KiB
Go
// Copyright 2022 Woodpecker Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package matrix
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import (
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"strings"
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pipeline "github.com/woodpecker-ci/woodpecker/pipeline/frontend/yaml"
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"codeberg.org/6543/xyaml"
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)
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const (
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limitTags = 10
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limitAxis = 25
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)
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// Matrix represents the pipeline matrix.
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type Matrix map[string][]string
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// Axis represents a single permutation of entries from the pipeline matrix.
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type Axis map[string]string
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// String returns a string representation of an Axis as a comma-separated list
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// of environment variables.
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func (a Axis) String() string {
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var envs []string
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for k, v := range a {
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envs = append(envs, k+"="+v)
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}
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return strings.Join(envs, " ")
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}
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// Parse parses the Yaml matrix definition.
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func Parse(data []byte) ([]Axis, error) {
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axis, err := parseList(data)
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if err == nil && len(axis) != 0 {
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return axis, nil
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}
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matrix, err := parse(data)
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if err != nil {
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return nil, err
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}
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if len(matrix) == 0 {
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return []Axis{}, nil
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}
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return calc(matrix), nil
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}
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// ParseString parses the Yaml string matrix definition.
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func ParseString(data string) ([]Axis, error) {
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return Parse([]byte(data))
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}
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func calc(matrix Matrix) []Axis {
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// calculate number of permutations and extract the list of tags
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// (ie go_version, redis_version, etc)
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var perm int
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var tags []string
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for k, v := range matrix {
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perm *= len(v)
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if perm == 0 {
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perm = len(v)
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}
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tags = append(tags, k)
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}
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// structure to hold the transformed result set
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var axisList []Axis
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// for each axis calculate the unique set of values that should be used.
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for p := 0; p < perm; p++ {
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axis := map[string]string{}
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decr := perm
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for i, tag := range tags {
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elems := matrix[tag]
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decr = decr / len(elems)
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elem := p / decr % len(elems)
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axis[tag] = elems[elem]
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// enforce a maximum number of tags in the pipeline matrix.
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if i > limitTags {
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break
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}
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}
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// append to the list of axis.
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axisList = append(axisList, axis)
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// enforce a maximum number of axis that should be calculated.
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if p > limitAxis {
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break
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}
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}
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return axisList
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}
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func parse(raw []byte) (Matrix, error) {
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data := struct {
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Matrix map[string][]string
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}{}
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if err := xyaml.Unmarshal(raw, &data); err != nil {
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return nil, &pipeline.PipelineParseError{Err: err}
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}
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return data.Matrix, nil
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}
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func parseList(raw []byte) ([]Axis, error) {
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data := struct {
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Matrix struct {
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Include []Axis
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}
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}{}
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if err := xyaml.Unmarshal(raw, &data); err != nil {
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return nil, &pipeline.PipelineParseError{Err: err}
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}
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return data.Matrix.Include, nil
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}
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