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// SPDX-FileCopyrightText: 2017 Stefan Majewsky <majewsky@gmx.net>
// SPDX-License-Identifier: GPL-3.0-only
package rtree
import (
"os"
"path/filepath"
"regexp"
"strings"
"github.com/majewsky/gofu/internal/cli"
)
// RemoteAlias describes an alias that can be used in a Git remote URL (as
// defined by the "url.<base>.insteadOf" directive in man:git-config(1)).
type RemoteAlias struct {
Alias string
Replacement string
}
// IndexPath is where the index file is stored.
var IndexPath string
// OldIndexPath is where the old index file was stored.
// This is only used to detect if a system has not been upgraded to the new index format yet.
// TODO: remove this after some time
var OldIndexPath string
// RootPath is the directory below which all repositories are located. Its value
// is $GOPATH/src to match the repository layout created by `go get`.
var RootPath string
// RemoteAliases is the list of remote aliases that is used by ExpandRemoteURL().
var RemoteAliases []*RemoteAlias
// Init initializes the global variables of this package to their standard
// values, unless they are already populated. Unit tests shall set IndexPath,
// RootPath etc. before calling Exec(), such that this function becomes a no-op
// when called by Exec().
//
// Returns false if initialization failed.
func Init() bool {
ok := true //until shown otherwise
if IndexPath == "" {
homeDir := os.Getenv("HOME")
if homeDir == "" {
cli.Interface.ShowError("$HOME is not set (rtree needs the HOME variable to locate its index file)")
ok = false //but keep going to report all errors at once
} else {
IndexPath = filepath.Join(homeDir, ".config/rtree/index.json")
OldIndexPath = filepath.Join(homeDir, ".rtree/index.yaml")
}
}
if RootPath == "" {
gopath := os.Getenv("GOPATH")
if gopath == "" {
cli.Interface.ShowError("$GOPATH is not set (rtree needs the GOPATH variable to know where to look for and place repos)")
ok = false //but keep going to report all errors at once
} else {
RootPath = filepath.Join(gopath, "src")
}
}
if RemoteAliases == nil {
out, err := cli.Interface.CaptureStdout(cli.Command{
Program: []string{"git", "config", "--global", "-l"},
})
if err != nil {
cli.Interface.ShowError(err.Error())
ok = false //but keep going to report all errors at once
}
rx := regexp.MustCompile(`^url\.([^=]+)\.insteadof=(.+)$`)
for line := range strings.SplitSeq(out, "\n") {
match := rx.FindStringSubmatch(line)
if match == nil {
continue
}
RemoteAliases = append(RemoteAliases, &RemoteAlias{
Alias: match[2],
Replacement: match[1],
})
}
}
return ok
}
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