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authorBrian Picciano <mediocregopher@gmail.com>2022-05-17 11:56:17 -0600
committerBrian Picciano <mediocregopher@gmail.com>2022-05-17 11:56:17 -0600
commit4d2332582355c0b4c70d7817e569139d502d97a1 (patch)
tree07d8778811f625ec46b6b0c79af252f393ee4d52 /srv/src/cfg
parent788aba3d0d0bc98c0164f87cf3a4941cf4587a54 (diff)
Implement cfg.BoolVar method
Diffstat (limited to 'srv/src/cfg')
-rw-r--r--srv/src/cfg/cfg.go21
-rw-r--r--srv/src/cfg/cfg_test.go21
2 files changed, 42 insertions, 0 deletions
diff --git a/srv/src/cfg/cfg.go b/srv/src/cfg/cfg.go
index 32fc3e7..d87c45b 100644
--- a/srv/src/cfg/cfg.go
+++ b/srv/src/cfg/cfg.go
@@ -211,6 +211,27 @@ func (c *Cfg) Int(name string, value int, usage string) *int {
return p
}
+// BoolVar is equivalent to flag.FlagSet's BoolVar method, but will additionally
+// set up an environment variable for the parameter.
+func (c *Cfg) BoolVar(p *bool, name string, value bool, usage string) {
+
+ envName := c.envifyName(name)
+
+ c.flagSet.BoolVar(p, name, value, envifyUsage(envName, usage))
+
+ if valStr := c.params.Env[envName]; valStr != "" {
+ *p = valStr != "" && valStr != "0" && valStr != "false"
+ }
+}
+
+// Bool is equivalent to flag.FlagSet's Bool method, but will additionally set
+// up an environment variable for the parameter.
+func (c *Cfg) Bool(name string, value bool, usage string) *bool {
+ p := new(bool)
+ c.BoolVar(p, name, value, usage)
+ return p
+}
+
// SubCmd should be called _after_ Init. Init will have consumed all arguments
// up until the first non-flag argument. This non-flag argument is a
// sub-command, and is returned by this method. This method also resets Cfg's
diff --git a/srv/src/cfg/cfg_test.go b/srv/src/cfg/cfg_test.go
index 7ccf94a..8266c89 100644
--- a/srv/src/cfg/cfg_test.go
+++ b/srv/src/cfg/cfg_test.go
@@ -44,3 +44,24 @@ func TestIntVar(t *testing.T) {
assert.Equal(t, 222, bar)
assert.Equal(t, 333, baz)
}
+
+func TestBoolVar(t *testing.T) {
+
+ cfg := New(Params{
+ Args: []string{"--foo=1"},
+ Env: map[string]string{"FOO": "0", "BAR": "anything", "BIZ": "0"},
+ })
+
+ var foo, bar, baz, biz bool
+
+ cfg.BoolVar(&foo, "foo", false, "")
+ cfg.BoolVar(&bar, "bar", false, "")
+ cfg.BoolVar(&baz, "baz", false, "")
+ cfg.BoolVar(&biz, "biz", true, "")
+
+ assert.NoError(t, cfg.Init(context.Background()))
+ assert.Equal(t, true, foo)
+ assert.Equal(t, true, bar)
+ assert.Equal(t, false, baz)
+ assert.Equal(t, false, biz)
+}