Initial grus version

5 files changed, 132 insertions, 0 deletions

diff --git a/cmd/grus/env.go b/cmd/grus/env.go
new file mode 100644
index 0000000..4d72030
--- /dev/null
+++ b/cmd/grus/env.go
@@ -0,0 +1,17 @@
+package main
+
+import "os"
+
+// getEnv will check if the the key exists, if it does then it'll
+// return the value otherwise it will return fallback string.
+func getEnv(key, fallback string) string {
+	// We use os.LookupEnv instead of using os.GetEnv and checking
+	// if the length equals 0 because environment variable can be
+	// set and be of length 0. User could've set key="" which
+	// means the variable was set but the length is 0.
+	value, exists := os.LookupEnv(key)
+	if !exists {
+		value = fallback
+	}
+	return value
+}
diff --git a/cmd/grus/grus.go b/cmd/grus/grus.go
new file mode 100644
index 0000000..a68db97
--- /dev/null
+++ b/cmd/grus/grus.go
@@ -0,0 +1,58 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+	"os"
+
+	"tildegit.org/andinus/grus/lexical"
+	"tildegit.org/andinus/grus/search"
+	"tildegit.org/andinus/grus/storage"
+)
+
+func grus() {
+	version := "v0.1.0"
+
+	// Early Check: If command was not passed then print usage and
+	// exit. Later command & service both are checked, this check
+	// is for version command. If not checked then running grus
+	// without any args will fail because os.Args[1] will panic
+	// the program & produce runtime error.
+	if len(os.Args) == 1 || len(os.Args[1]) == 0 {
+		printUsage()
+		os.Exit(0)
+	}
+
+	// Running just `grus` would've paniced the program here if
+	// length of os.Args was not checked beforehand because there
+	// would be no os.Args[1].
+	switch os.Args[1] {
+	case "version", "v", "-version", "--version", "-v":
+		fmt.Printf("Grus %s\n", version)
+		os.Exit(0)
+	case "help", "-help", "--help", "-h":
+		printUsage()
+		os.Exit(0)
+	case "init", "i":
+		db := storage.Init()
+		db.Conn.Close()
+		os.Exit(0)
+	}
+
+	// Initialize the database connection.
+	db := storage.InitConn()
+	defer db.Conn.Close()
+
+	word := os.Args[1]
+	sorted := lexical.Sort(word)
+
+	out, err := search.Word(sorted, db)
+	if err == sql.ErrNoRows {
+		fmt.Println("Word not found in database.")
+		return
+	} else if err != nil {
+		log.Fatalf("grus: Search failed :: %s", err)
+	}
+	fmt.Println(out)
+}
diff --git a/cmd/grus/main_openbsd.go b/cmd/grus/main_openbsd.go
new file mode 100644
index 0000000..5222bbe
--- /dev/null
+++ b/cmd/grus/main_openbsd.go
@@ -0,0 +1,40 @@
+// +build openbsd
+
+package main
+
+import (
+	"log"
+	"os"
+
+	"golang.org/x/sys/unix"
+	"tildegit.org/andinus/grus/storage"
+	"tildegit.org/andinus/lynx"
+)
+
+func main() {
+	unveil()
+	grus()
+}
+
+func unveil() {
+	path := storage.GetDir()
+	err := os.MkdirAll(path, os.ModePerm)
+	if err != nil {
+		log.Fatalf("Unable to create directory: %s", path)
+	}
+
+	paths := make(map[string]string)
+
+	paths[path] = "rwc"
+
+	err = lynx.UnveilPathsStrict(paths)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// Block further unveil calls.
+	err = unix.UnveilBlock()
+	if err != nil {
+		log.Fatal(err)
+	}
+}
diff --git a/cmd/grus/main_other.go b/cmd/grus/main_other.go
new file mode 100644
index 0000000..88824ad
--- /dev/null
+++ b/cmd/grus/main_other.go
@@ -0,0 +1,7 @@
+// +build !openbsd
+
+package main
+
+func main() {
+	grus()
+}
diff --git a/cmd/grus/usage.go b/cmd/grus/usage.go
new file mode 100644
index 0000000..1749ba7
--- /dev/null
+++ b/cmd/grus/usage.go
@@ -0,0 +1,10 @@
+package main
+
+import "fmt"
+
+func printUsage() {
+	fmt.Println("Usage: grus <word> / <command>")
+	fmt.Println("\nCommands: ")
+	fmt.Println(" help     Print help")
+	fmt.Println(" version  Print Grus version")
+}