From 58a4af83e0caf09744dd698b5be937205b81e733 Mon Sep 17 00:00:00 2001
From: Stefan Majewsky <majewsky@gmx.net>
Date: Tue, 9 May 2017 22:00:15 +0200
Subject: refactor package rtree towards testability

---
 pkg/rtree/init.go | 99 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 pkg/rtree/init.go

(limited to 'pkg/rtree/init.go')

diff --git a/pkg/rtree/init.go b/pkg/rtree/init.go
new file mode 100644
index 0000000..1d2dc10
--- /dev/null
+++ b/pkg/rtree/init.go
@@ -0,0 +1,99 @@
+/*******************************************************************************
+*
+* Copyright 2017 Stefan Majewsky <majewsky@gmx.net>
+*
+* This program is free software: you can redistribute it and/or modify it under
+* the terms of the GNU General Public License as published by the Free Software
+* Foundation, either version 3 of the License, or (at your option) any later
+* version.
+*
+* This program is distributed in the hope that it will be useful, but WITHOUT ANY
+* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License along with
+* this program. If not, see <http://www.gnu.org/licenses/>.
+*
+*******************************************************************************/
+
+package rtree
+
+import (
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+
+	"github.com/majewsky/gofu/pkg/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
+
+//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, ".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.Split(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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