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dagger/mod/require.go
Sam Alba cee8c91e50 mod: added support for version constraint when fetching a remote version
Signed-off-by: Sam Alba <samalba@users.noreply.github.com>
2021-10-21 17:50:18 -07:00

94 lines
2.2 KiB
Go

package mod
import (
"fmt"
"os"
"path"
"regexp"
"strings"
)
type Require struct {
repo string
path string
cloneRepo string
clonePath string
version string
versionConstraint string
checksum string
}
func newRequire(repoName, versionConstraint string) (*Require, error) {
switch {
case strings.HasPrefix(repoName, "github.com"):
return parseGithubRepoName(repoName, versionConstraint)
case strings.HasPrefix(repoName, "alpha.dagger.io"):
return parseDaggerRepoName(repoName, versionConstraint)
default:
return nil, fmt.Errorf("repo name does not match suported providers")
}
}
var githubRepoNameRegex = regexp.MustCompile(`(github.com/[a-zA-Z0-9_.-]+/[a-zA-Z0-9_.-]+)([a-zA-Z0-9/_.-]*)@?([0-9a-zA-Z.-]*)`)
func parseGithubRepoName(repoName, versionConstraint string) (*Require, error) {
repoMatches := githubRepoNameRegex.FindStringSubmatch(repoName)
if len(repoMatches) < 4 {
return nil, fmt.Errorf("issue when parsing github repo")
}
return &Require{
repo: repoMatches[1],
path: repoMatches[2],
version: repoMatches[3],
versionConstraint: versionConstraint,
cloneRepo: repoMatches[1],
clonePath: repoMatches[2],
}, nil
}
var daggerRepoNameRegex = regexp.MustCompile(`alpha.dagger.io([a-zA-Z0-9/_.-]*)@?([0-9a-zA-Z.-]*)`)
func parseDaggerRepoName(repoName, versionConstraint string) (*Require, error) {
repoMatches := daggerRepoNameRegex.FindStringSubmatch(repoName)
if len(repoMatches) < 3 {
return nil, fmt.Errorf("issue when parsing dagger repo")
}
return &Require{
repo: "alpha.dagger.io",
path: repoMatches[1],
version: repoMatches[2],
versionConstraint: versionConstraint,
cloneRepo: "github.com/dagger/universe",
clonePath: path.Join("/stdlib", repoMatches[1]),
}, nil
}
func (r *Require) String() string {
return fmt.Sprintf("%s@%s", r.fullPath(), r.version)
}
func (r *Require) fullPath() string {
return path.Join(r.repo, r.path)
}
func replace(r *Require, sourceRepoPath, destPath string) error {
// remove previous package directory
if err := os.RemoveAll(destPath); err != nil {
return err
}
if err := os.Rename(path.Join(sourceRepoPath, r.clonePath), destPath); err != nil {
return err
}
return nil
}