all: implement command "env-get" to get value from environment files

The env-get command get the value from environment files.
Syntax,

----
<key> [dir]
----

The "key" argument define the key where value is stored in environment
using "section:sub:name" format.
The "dir" argument is optional, its define the directory where environment
files will be loaded, recursively, from BaseDir to dir.
If its empty default to the current directory.

1 files changed, 72 insertions, 1 deletions

diff --git a/awwan_env_test.go b/awwan_env_test.go
index 963658b..3fc6f67 100644
--- a/awwan_env_test.go
+++ b/awwan_env_test.go
@@ -11,6 +11,69 @@ import (
 	"github.com/shuLhan/share/lib/test"
 )
 
+func TestAwwanEnvGet(t *testing.T) {
+	var (
+		baseDir = `testdata/env-get`
+
+		aww *Awwan
+		err error
+	)
+
+	aww, err = New(baseDir)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	type testCase struct {
+		desc string
+		dir  string
+		key  string
+		exp  string
+	}
+	var cases = []testCase{{
+		desc: `withEmptyKey`,
+		dir:  baseDir,
+		exp:  `EnvGet: empty key`,
+	}, {
+		desc: `withMissingSection`,
+		dir:  baseDir,
+		key:  `::name`,
+	}, {
+		desc: `withMissingName`,
+		dir:  baseDir,
+		key:  `host`,
+	}, {
+		desc: `withValidName`,
+		dir:  baseDir,
+		key:  `host::name`,
+		exp:  `localhost`,
+	}, {
+		desc: `fromVault`,
+		dir:  baseDir,
+		key:  `user:database:pass`,
+		exp:  `s3cret`,
+	}, {
+		desc: `fromSubdirMyhost`,
+		dir:  filepath.Join(baseDir, `myhost`),
+		key:  `host::name`,
+		exp:  `myhost`,
+	}}
+
+	var (
+		c   testCase
+		got string
+	)
+	for _, c = range cases {
+		got, err = aww.EnvGet(c.dir, c.key)
+		if err != nil {
+			test.Assert(t, c.desc+` error`, c.exp, err.Error())
+			continue
+		}
+
+		test.Assert(t, c.desc, c.exp, got)
+	}
+}
+
 func TestAwwanEnvSet(t *testing.T) {
 	var (
 		baseDir = t.TempDir()
@@ -19,7 +82,7 @@ func TestAwwanEnvSet(t *testing.T) {
 		err   error
 	)
 
-	testInitWorkspace(baseDir)
+	testInitWorkspace(baseDir, nil, nil)
 
 	tdata, err = test.LoadData(`testdata/env_set_test.data`)
 	if err != nil {
@@ -84,6 +147,7 @@ func TestAwwanEnvSet(t *testing.T) {
 	var (
 		c          testCase
 		gotContent []byte
+		gotValue   string
 	)
 
 	for _, c = range cases {
@@ -99,5 +163,12 @@ func TestAwwanEnvSet(t *testing.T) {
 		}
 
 		test.Assert(t, c.desc, c.exp, string(gotContent))
+
+		gotValue, err = aww.EnvGet(baseDir, c.key)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		test.Assert(t, c.desc+` EnvGet`, c.val, gotValue)
 	}
 }