79 lines
1.5 KiB
Go
79 lines
1.5 KiB
Go
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package main
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import (
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"github.com/hillu/go-yara/v4"
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"github.com/package-url/packageurl-go"
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"gopkg.in/src-d/go-git.v4"
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"gopkg.in/src-d/go-git.v4/plumbing"
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"gopkg.in/src-d/go-git.v4/plumbing/object"
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"gopkg.in/src-d/go-git.v4/storage/memory"
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)
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// Load rules from a git url.
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// Supports github, bitbucket, gitlab, and regular git urls.
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// Version will be interpreted as a commit hash
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func loadRulesFromGit(pkg packageurl.PackageURL, c *yara.Compiler) error {
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var repoUrl string
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switch pkg.Type {
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case "github":
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repoUrl = "https://github.com/" + pkg.Namespace + "/" + pkg.Name
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case "bitbucket":
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repoUrl = "https://bitbucket.com/" + pkg.Namespace + "/" + pkg.Name
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case "gitlab":
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repoUrl = "https://gitlab.com/" + pkg.Namespace + "/" + pkg.Name
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default:
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repoUrl = "https://" + pkg.Namespace + "/" + pkg.Name
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}
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r, err := git.Clone(memory.NewStorage(), nil, &git.CloneOptions{
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URL: repoUrl,
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})
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if err != nil {
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return err
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}
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var hash plumbing.Hash
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if pkg.Version != "" {
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hash = plumbing.NewHash(pkg.Version)
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} else {
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ref, err := r.Head()
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if err != nil {
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return err
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}
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hash = ref.Hash()
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}
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commit, err := r.CommitObject(hash)
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if err != nil {
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return err
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}
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tree, err := commit.Tree()
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if err != nil {
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return err
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}
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tree, err = tree.Tree(pkg.Subpath)
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if err != nil {
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return err
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}
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return tree.Files().ForEach(func(f *object.File) error {
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contents, err := f.Contents()
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if err != nil {
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return err
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}
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return c.AddString(contents, "")
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})
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}
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