Add flag --force on all commands using utils.WriteFile

Fixes smallstep/ca-component#121

command/ca/bootstrap.go

@@ -7,10 +7,12 @@ import (
 
 	"github.com/pkg/errors"
 	"github.com/smallstep/certificates/ca"
+	"github.com/smallstep/cli/command"
 	"github.com/smallstep/cli/config"
 	"github.com/smallstep/cli/crypto/pemutil"
 	"github.com/smallstep/cli/crypto/pki"
 	"github.com/smallstep/cli/errs"
+	"github.com/smallstep/cli/flags"
 	"github.com/smallstep/cli/utils"
 	"github.com/urfave/cli"
 )
@@ -18,7 +20,7 @@ import (
 func bootstrapCommand() cli.Command {
 	return cli.Command{
 		Name:      "bootstrap",
-		Action:    cli.ActionFunc(bootstrapAction),
+		Action:    command.ActionFunc(bootstrapAction),
 		Usage:     "initializes the environment to use the CA commands",
 		UsageText: "**step ca bootstrap** [**--ca-url**=<uri>] [**--fingerprint**=<fingerprint>]",
 		Description: `**step ca bootstrap** downloads the root certificate from the certificate
@@ -30,7 +32,7 @@ url, the root certificate location and its fingerprint.
 
 After the bootstrap, ca commands do not need to specify the flags 
 --ca-url, --root or --fingerprint if we want to use the same environment.`,
-		Flags: []cli.Flag{caURLFlag, fingerprintFlag},
+		Flags: []cli.Flag{caURLFlag, fingerprintFlag, flags.Force},
 	}
 }
 

command/ca/certificate.go

@@ -14,9 +14,11 @@ import (
 	"github.com/pkg/errors"
 	"github.com/smallstep/certificates/api"
 	"github.com/smallstep/certificates/ca"
+	"github.com/smallstep/cli/command"
 	"github.com/smallstep/cli/crypto/pemutil"
 	"github.com/smallstep/cli/crypto/pki"
 	"github.com/smallstep/cli/errs"
+	"github.com/smallstep/cli/flags"
 	"github.com/smallstep/cli/jose"
 	"github.com/smallstep/cli/ui"
 	"github.com/smallstep/cli/utils"
@@ -26,7 +28,7 @@ import (
 func newCertificateCommand() cli.Command {
 	return cli.Command{
 		Name:   "certificate",
-		Action: cli.ActionFunc(newCertificateAction),
+		Action: command.ActionFunc(newCertificateAction),
 		Usage:  "generates a new certificate pair signed by the root certificate",
 		UsageText: `**step ca certificate** <hostname> <crt-file> <key-file>
 		[**--token**=<token>] [**--ca-url**=<uri>] [**--root**=<file>]
@@ -63,6 +65,7 @@ $ step ca certificate --token $TOKEN --not-after=1h internal.example.com interna
 			rootFlag,
 			notBeforeFlag,
 			notAfterFlag,
+			flags.Force,
 		},
 	}
 }
@@ -70,7 +73,7 @@ $ step ca certificate --token $TOKEN --not-after=1h internal.example.com interna
 func signCertificateCommand() cli.Command {
 	return cli.Command{
 		Name:   "sign",
-		Action: cli.ActionFunc(signCertificateAction),
+		Action: command.ActionFunc(signCertificateAction),
 		Usage:  "generates a new certificate signing a certificate request",
 		UsageText: `**step ca sign** <csr-file> <crt-file>
 		[**--token**=<token>] [**--ca-url**=<uri>] [**--root**=<file>]
@@ -104,6 +107,7 @@ $ step ca sign --token $TOKEN --not-after=1h internal.csr internal.crt
 			rootFlag,
 			notBeforeFlag,
 			notAfterFlag,
+			flags.Force,
 		},
 	}
 }
@@ -111,7 +115,7 @@ $ step ca sign --token $TOKEN --not-after=1h internal.csr internal.crt
 func renewCertificateCommand() cli.Command {
 	return cli.Command{
 		Name:   "renew",
-		Action: cli.ActionFunc(renewCertificateAction),
+		Action: command.ActionFunc(renewCertificateAction),
 		Usage:  "renew a valid certificate",
 		UsageText: `**step ca renew** <crt-file> <key-file>
 		[**--ca-url**=<uri>] [**--root**=<file>]
@@ -176,10 +180,7 @@ sequence of decimal numbers, each with optional fraction and a unit suffix, such
 as "300ms", "-1.5h" or "2h45m". Valid time units are "ns", "us" (or "µs"), "ms",
 "s", "m", "h".`,
 			},
-			cli.BoolFlag{
-				Name:  "f,force",
-				Usage: "Force the overwrite of files without asking.",
-			},
+			flags.Force,
 		},
 	}
 }
@@ -464,7 +465,7 @@ func renewCertificateAction(ctx *cli.Context) error {
 	}
 	data := append(pem.EncodeToMemory(serverBlock), pem.EncodeToMemory(caBlock)...)
 
-	if err := utils.WriteFileForce(outFile, data, 0600, ctx.Bool("force")); err != nil {
+	if err := utils.WriteFile(outFile, data, 0600); err != nil {
 		return errs.FileError(err, outFile)
 	}
 

command/ca/root.go

@@ -7,15 +7,17 @@ import (
 	"github.com/pkg/errors"
 
 	"github.com/smallstep/certificates/ca"
+	"github.com/smallstep/cli/command"
 	"github.com/smallstep/cli/crypto/pemutil"
 	"github.com/smallstep/cli/errs"
+	"github.com/smallstep/cli/flags"
 	"github.com/urfave/cli"
 )
 
 func rootComand() cli.Command {
 	return cli.Command{
 		Name:   "root",
-		Action: cli.ActionFunc(rootAction),
+		Action: command.ActionFunc(rootAction),
 		Usage:  "downloads and validates the root certificate",
 		UsageText: `**step ca root** <root-file>
 		[**--ca-url**=<uri>] [**--fingerprint**=<fingerprint>]`,
@@ -50,6 +52,7 @@ $ step ca root root_ca.crt \
 		Flags: []cli.Flag{
 			caURLFlag,
 			fingerprintFlag,
+			flags.Force,
 		},
 	}
 }

command/ca/token.go

@@ -10,9 +10,11 @@ import (
 
 	"github.com/pkg/errors"
 	"github.com/smallstep/certificates/authority"
+	"github.com/smallstep/cli/command"
 	"github.com/smallstep/cli/crypto/pki"
 	"github.com/smallstep/cli/crypto/randutil"
 	"github.com/smallstep/cli/errs"
+	"github.com/smallstep/cli/flags"
 	"github.com/smallstep/cli/jose"
 	"github.com/smallstep/cli/token"
 	"github.com/smallstep/cli/token/provision"
@@ -30,7 +32,7 @@ type provisionersSelect struct {
 func newTokenCommand() cli.Command {
 	return cli.Command{
 		Name:   "token",
-		Action: cli.ActionFunc(newTokenAction),
+		Action: command.ActionFunc(newTokenAction),
 		Usage:  "generates an OTT granting access to the CA",
 		UsageText: `**step ca token** <hostname>
 		[--**kid**=<kid>] [--**issuer**=<issuer>] [**--ca-url**=<uri>] [**--root**=<file>]
@@ -117,6 +119,7 @@ the certificate authority.`,
 				Usage: `Creates a token without contacting the certificate authority. Offline mode
 requires the flags <--kid>, <--issuer>, <--key>, <--ca-url>, and <--root>.`,
 			},
+			flags.Force,
 		},
 	}
 }

command/certificate/bundle.go

@@ -5,14 +5,17 @@ import (
 	"io/ioutil"
 
 	"github.com/pkg/errors"
+	"github.com/smallstep/cli/command"
 	"github.com/smallstep/cli/errs"
+	"github.com/smallstep/cli/flags"
+	"github.com/smallstep/cli/utils"
 	"github.com/urfave/cli"
 )
 
 func bundleCommand() cli.Command {
 	return cli.Command{
 		Name:      "bundle",
-		Action:    cli.ActionFunc(bundleAction),
+		Action:    command.ActionFunc(bundleAction),
 		Usage:     `bundle a certificate with intermediate certificate(s) needed for certificate path validation.`,
 		UsageText: `**step certificate bundle** <crt_file> <ca> <bundle_file>`,
 		Description: `**step certificate bundle** bundles a certificate
@@ -41,6 +44,7 @@ Bundle a certificate with the intermediate certificate authority (issuer):
 $ step certificate bundle foo.crt intermediate-ca.crt foo-bundle.crt
 '''
 `,
+		Flags: []cli.Flag{flags.Force},
 	}
 }
 
@@ -70,7 +74,7 @@ func bundleAction(ctx *cli.Context) error {
 	}
 
 	chainFile := ctx.Args().Get(2)
-	if err := ioutil.WriteFile(chainFile,
+	if err := utils.WriteFile(chainFile,
 		append(pem.EncodeToMemory(crtBlock), pem.EncodeToMemory(caBlock)...), 0600); err != nil {
 		return errs.FileError(err, chainFile)
 	}

command/certificate/create.go

@@ -4,13 +4,14 @@ import (
 	"crypto/rand"
 	"crypto/x509/pkix"
 	"encoding/pem"
-	"os"
 
 	"github.com/pkg/errors"
+	"github.com/smallstep/cli/command"
 	"github.com/smallstep/cli/crypto/keys"
 	"github.com/smallstep/cli/crypto/pemutil"
 	"github.com/smallstep/cli/crypto/x509util"
 	"github.com/smallstep/cli/errs"
+	"github.com/smallstep/cli/flags"
 	x509 "github.com/smallstep/cli/pkg/x509"
 	"github.com/smallstep/cli/utils"
 	"github.com/urfave/cli"
@@ -19,7 +20,7 @@ import (
 func createCommand() cli.Command {
 	return cli.Command{
 		Name:   "create",
-		Action: cli.ActionFunc(createAction),
+		Action: command.ActionFunc(createAction),
 		Usage:  "create a certificate or certificate signing request",
 		UsageText: `**step certificate create** <subject> <crt_file> <key_file>
 [**ca**=<issuer-cert>] [**ca-key**=<issuer-key>] [**--csr**]
@@ -192,6 +193,7 @@ unset, default is P-256 for EC keys and Ed25519 for OKP keys.
     :  Ed25519 Curve
 `,
 			},
+			flags.Force,
 		},
 	}
 }
@@ -320,8 +322,7 @@ func createAction(ctx *cli.Context) error {
 		return errs.NewError("unexpected type: %s", typ)
 	}
 
-	if err := utils.WriteFile(crtFile, pem.EncodeToMemory(pubPEM),
-		os.FileMode(0600)); err != nil {
+	if err := utils.WriteFile(crtFile, pem.EncodeToMemory(pubPEM), 0600); err != nil {
 		return errs.FileError(err, crtFile)
 	}
 

command/certificate/format.go

@@ -7,7 +7,9 @@ import (
 	"os"
 
 	"github.com/pkg/errors"
+	"github.com/smallstep/cli/command"
 	"github.com/smallstep/cli/errs"
+	"github.com/smallstep/cli/flags"
 	"github.com/smallstep/cli/utils"
 	"github.com/urfave/cli"
 )
@@ -15,7 +17,7 @@ import (
 func formatCommand() cli.Command {
 	return cli.Command{
 		Name:      "format",
-		Action:    cli.ActionFunc(formatAction),
+		Action:    command.ActionFunc(formatAction),
 		Usage:     `reformat certificate.`,
 		UsageText: `**step certificate format** <crt_file> [**--out**=<path>]`,
 		Description: `**step certificate format** prints the certificate in
@@ -55,6 +57,7 @@ $ step certificate format foo.pem --out foo.der
 				Name:  "out",
 				Usage: `Path to write the reformatted result.`,
 			},
+			flags.Force,
 		},
 	}
 }

command/command.go

@@ -20,6 +20,7 @@ import (
 const IgnoreEnvVar = "STEP_IGNORE_ENV_VAR"
 
 var cmds []cli.Command
+var currentContext *cli.Context
 
 func init() {
 	os.Unsetenv(IgnoreEnvVar)
@@ -40,6 +41,19 @@ func Retrieve() []cli.Command {
 	return cmds
 }
 
+// ActionFunc returns a cli.ActionFunc that stores the context.
+func ActionFunc(fn cli.ActionFunc) cli.ActionFunc {
+	return func(ctx *cli.Context) error {
+		currentContext = ctx
+		return fn(ctx)
+	}
+}
+
+// IsForce returns if the force flag was passed
+func IsForce() bool {
+	return currentContext != nil && currentContext.Bool("force")
+}
+
 // getConfigVars load the defaults.json file and sets the flags if they are not
 // already set or the EnvVar is set to IgnoreEnvVar.
 //

command/crypto/change-pass.go

@@ -9,8 +9,10 @@ import (
 	"github.com/pkg/errors"
 	"github.com/urfave/cli"
 
+	"github.com/smallstep/cli/command"
 	"github.com/smallstep/cli/crypto/pemutil"
 	"github.com/smallstep/cli/errs"
+	"github.com/smallstep/cli/flags"
 	"github.com/smallstep/cli/jose"
 	"github.com/smallstep/cli/utils"
 )
@@ -18,7 +20,7 @@ import (
 func changePassCommand() cli.Command {
 	return cli.Command{
 		Name:      "change-pass",
-		Action:    cli.ActionFunc(changePassAction),
+		Action:    command.ActionFunc(changePassAction),
 		Usage:     "Change password of an encrypted private key (PEM or JWK format)",
 		UsageText: `**step crypto change-pass** <key-file> [**--out**=<file>]`,
 		Description: `**step crypto change-pass** extracts the private key from
@@ -56,6 +58,7 @@ $ step crypto change-pass key.jwk --out new-key.jwk
 				Name:  "out,output-file",
 				Usage: "The <file> new encrypted key path. Default to overwriting the <key> positional argument",
 			},
+			flags.Force,
 		},
 	}
 }

command/crypto/jwk/create.go

@@ -9,8 +9,10 @@ import (
 	"os"
 
 	"github.com/pkg/errors"
+	"github.com/smallstep/cli/command"
 	"github.com/smallstep/cli/crypto/randutil"
 	"github.com/smallstep/cli/errs"
+	"github.com/smallstep/cli/flags"
 	"github.com/smallstep/cli/jose"
 	"github.com/smallstep/cli/utils"
 	"github.com/urfave/cli"
@@ -26,7 +28,7 @@ const (
 func createCommand() cli.Command {
 	return cli.Command{
 		Name:   "create",
-		Action: cli.ActionFunc(createAction),
+		Action: command.ActionFunc(createAction),
 		Usage:  "create a JWK (JSON Web Key)",
 		UsageText: `**step crypto jwk create** <public-jwk-file> <private-jwk-file>
     [**--kty**=<type>] [**--alg**=<algorithm>] [**--use**=<use>]
@@ -397,12 +399,9 @@ existing <pem-file> instead of creating a new key.`,
 key material will be written to disk unencrypted. This is not
 recommended. Requires **--insecure** flag.`,
 			},
-			cli.BoolFlag{
-				Name: "subtle",
-			},
-			cli.BoolFlag{
-				Name: "insecure",
-			},
+			flags.Subtle,
+			flags.Insecure,
+			flags.Force,
 		},
 	}
 }

command/crypto/key/format.go

@@ -10,9 +10,10 @@ import (
 	"os"
 
 	"github.com/pkg/errors"
-
+	"github.com/smallstep/cli/command"
 	"github.com/smallstep/cli/crypto/pemutil"
 	"github.com/smallstep/cli/errs"
+	"github.com/smallstep/cli/flags"
 	"github.com/smallstep/cli/utils"
 	"github.com/urfave/cli"
 )
@@ -20,7 +21,7 @@ import (
 func formatCommand() cli.Command {
 	return cli.Command{
 		Name:      "format",
-		Action:    cli.ActionFunc(formatAction),
+		Action:    command.ActionFunc(formatAction),
 		Usage:     `reformat certificate.`,
 		UsageText: `**step crypto key format** <key_file> [**--out**=<path>]`,
 		Description: `**step crypto key format** prints the key in
@@ -66,6 +67,7 @@ $ step crypto key format foo-key.pem --out foo-key.der
 				Name:  "password-file",
 				Usage: `location of file containing passphrase to decrypt private key`,
 			},
+			flags.Force,
 		},
 	}
 }

command/crypto/keypair.go

@@ -5,9 +5,11 @@ import (
 	"os"
 
 	"github.com/pkg/errors"
+	"github.com/smallstep/cli/command"
 	"github.com/smallstep/cli/crypto/keys"
 	"github.com/smallstep/cli/crypto/pemutil"
 	"github.com/smallstep/cli/errs"
+	"github.com/smallstep/cli/flags"
 	"github.com/smallstep/cli/jose"
 	"github.com/smallstep/cli/utils"
 	"github.com/urfave/cli"
@@ -16,7 +18,7 @@ import (
 func createKeyPairCommand() cli.Command {
 	return cli.Command{
 		Name:   "keypair",
-		Action: cli.ActionFunc(createAction),
+		Action: command.ActionFunc(createAction),
 		Usage:  "generate a public / private keypair in PEM format.",
 		UsageText: `**step crypto keypair** <pub_file> <priv_file>
 [**--curve**=<curve>] [**--no-password**] [**--size**=<size>]
@@ -135,6 +137,7 @@ existing <jwk-file> instead of creating a new key.`,
 Sensitive key material will be written to disk unencrypted. This is not
 recommended. Requires **--insecure** flag.`,
 			},
+			flags.Force,
 		},
 	}
 }

command/crypto/nacl/box.go

@@ -7,7 +7,9 @@ import (
 	"os"
 
 	"github.com/pkg/errors"
+	"github.com/smallstep/cli/command"
 	"github.com/smallstep/cli/errs"
+	"github.com/smallstep/cli/flags"
 	"github.com/smallstep/cli/utils"
 	"github.com/urfave/cli"
 	"golang.org/x/crypto/nacl/box"
@@ -93,7 +95,7 @@ message
 func boxKeypairCommand() cli.Command {
 	return cli.Command{
 		Name:      "keypair",
-		Action:    cli.ActionFunc(boxKeypairAction),
+		Action:    command.ActionFunc(boxKeypairAction),
 		Usage:     "generate a key for use with seal and open",
 		UsageText: "**step crypto nacl box keypair** <pub-file> <priv-file>",
 		Description: `Generates a new public/private keypair suitable for use with seal and open.
@@ -110,6 +112,7 @@ For examples, see **step help crypto nacl box**.
 
 <priv-file>
 :  The path to write the encrypted private key.`,
+		Flags: []cli.Flag{flags.Force},
 	}
 }
 

command/crypto/nacl/sign.go

@@ -7,7 +7,9 @@ import (
 	"os"
 
 	"github.com/pkg/errors"
+	"github.com/smallstep/cli/command"
 	"github.com/smallstep/cli/errs"
+	"github.com/smallstep/cli/flags"
 	"github.com/smallstep/cli/utils"
 	"github.com/urfave/cli"
 	"golang.org/x/crypto/nacl/sign"
@@ -65,7 +67,7 @@ message
 func signKeypairCommand() cli.Command {
 	return cli.Command{
 		Name:      "keypair",
-		Action:    cli.ActionFunc(signKeypairAction),
+		Action:    command.ActionFunc(signKeypairAction),
 		Usage:     "generates a pair for use with sign and open",
 		UsageText: "**step crypto nacl sign keypair** <pub-file> <priv-file>",
 		Description: `**step crypto nacl sign keypair** generates a secret key and a corresponding
@@ -74,6 +76,7 @@ public key valid for verifying and signing messages.
 This command uses an implementation of NaCl's crypto_sign_keypair function.
 
 For examples, see **step help crypto nacl sign**.`,
+		Flags: []cli.Flag{flags.Force},
 	}
 }
 

command/crypto/otp/generate.go

@@ -8,7 +8,9 @@ import (
 
 	"github.com/pquerna/otp"
 	"github.com/pquerna/otp/totp"
+	"github.com/smallstep/cli/command"
 	"github.com/smallstep/cli/errs"
+	"github.com/smallstep/cli/flags"
 	"github.com/smallstep/cli/utils"
 	"github.com/urfave/cli"
 )
@@ -16,7 +18,7 @@ import (
 func generateCommand() cli.Command {
 	return cli.Command{
 		Name:        "generate",
-		Action:      cli.ActionFunc(generateAction),
+		Action:      command.ActionFunc(generateAction),
 		Usage:       "one-time password",
 		UsageText:   `**step crypto otp generate**`,
 		Description: `**step crypto otp generate** does TOTP and HTOP`,
@@ -61,6 +63,7 @@ https://github.com/google/google-authenticator/wiki/Key-Uri-Format`,
 				Name:  "qr",
 				Usage: `Write a QR code to the specified path`,
 			},
+			flags.Force,
 		},
 	}
 }

crypto/pki/pki.go

@@ -6,7 +6,6 @@ import (
 	"encoding/json"
 	"encoding/pem"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -300,7 +299,7 @@ func (p *PKI) Save() error {
 		return errors.Wrapf(err, "error marshalling %s", p.config)
 	}
 
-	if err = ioutil.WriteFile(p.config, b, 0666); err != nil {
+	if err = utils.WriteFile(p.config, b, 0666); err != nil {
 		return errs.FileError(err, p.config)
 	}
 

flags/flags.go

@@ -1,206 +1,21 @@
 package flags
 
 import (
-	"fmt"
-	"strings"
-
 	"github.com/urfave/cli"
 )
 
-// OldPasswordFile returns a flag for receiving an old password
-func OldPasswordFile(usage string) cli.Flag {
-	if usage == "" {
-		usage = "The path to the `FILE` containing the old encryption password"
+// Subtle is the flag required for delicate operations.
+var Subtle = cli.BoolFlag{
+	Name: "subtle",
 }
 
-	return cli.StringFlag{
-		Name:   "old-password-file, o",
-		Usage:  usage,
-		EnvVar: "STEP_OLD_PASSWORD_FILE",
-	}
+// Insecure is the flag required on insecure operations
+var Insecure = cli.BoolFlag{
+	Name: "insecure",
 }
 
-// NewPasswordFile returns a flag for receiving a new password
-func NewPasswordFile(usage string) cli.Flag {
-	if usage == "" {
-		usage = "The path to the `FILE` containing the new encryption password"
-	}
-
-	return cli.StringFlag{
-		Name:   "new-password-file, n",
-		Usage:  usage,
-		EnvVar: "STEP_NEW_PASSWORD_FILE",
-	}
-}
-
-// Bits returns a flag for receiving the number of bits in generating a key
-func Bits(usage string, value int) cli.Flag {
-	if usage == "" {
-		usage = "Number of bits used to generate the private key"
-	}
-
-	if value == 0 {
-		value = 256
-	}
-
-	return cli.IntFlag{
-		Name:   "bits, b",
-		Usage:  usage,
-		EnvVar: "STEP_BITS",
-		Value:  value,
-	}
-}
-
-// Action returns a flag for receiving an action out of several possibilities
-func Action(usage string, possibilities []string, value string) cli.Flag {
-	usage = fmt.Sprintf("%s (Options: %s)", usage, strings.Join(possibilities, ", "))
-	return cli.StringFlag{
-		Name:   "action, a",
-		Usage:  usage,
-		EnvVar: "STEP_ACTION",
-		Value:  value,
-	}
-}
-
-// Type returns a flag for receiving a type of thing to create out of several
-// possibilties
-func Type(usage string, possibilities []string, value string) cli.Flag {
-	usage = fmt.Sprintf("%s (Options: %s)", usage, strings.Join(possibilities, ", "))
-	return cli.StringFlag{
-		Name:   "type, t",
-		Usage:  usage,
-		EnvVar: "STEP_TYPE",
-		Value:  value,
-	}
-}
-
-// Alg returns a flag for receiving the type of algorithm to use when performing an operation
-func Alg(usage string, possibilities []string, value string) cli.Flag {
-	usage = fmt.Sprintf("%s (Options: %s)", usage, strings.Join(possibilities, ", "))
-	return cli.StringFlag{
-		Name:   "alg",
-		Usage:  usage,
-		EnvVar: "STEP_ALG",
-		Value:  value,
-	}
-}
-
-// RootCertificate returns a flag for specifying the path to a root certificate
-func RootCertificate(usage string) cli.Flag {
-	if usage == "" {
-		usage = "The file `PATH` to the root certificate"
-	}
-
-	return cli.StringFlag{
-		Name:   "root, r",
-		Usage:  usage,
-		EnvVar: "STEP_ROOT_CERTIFICATE",
-	}
-}
-
-// PasswordFile returns a flag for specifying the path to a file containing a password
-func PasswordFile(usage string) cli.Flag {
-	if usage == "" {
-		usage = "Path to file containing a password"
-	}
-
-	return cli.StringFlag{
-		Name:   "password-file, p",
-		Usage:  usage,
-		EnvVar: "STEP_PASSWORD_FILE",
-	}
-}
-
-// OutputFile returns a flag for specifying the path inwhich to write output too
-func OutputFile(usage string) cli.Flag {
-	if usage == "" {
-		usage = "Path to where the output should be written"
-	}
-
-	return cli.StringFlag{
-		Name:   "output-file, o",
-		Usage:  usage,
-		EnvVar: "STEP_OUTPUT_FILE",
-	}
-}
-
-// Number returns a flag for collecting the number of something to create
-func Number(usage string) cli.Flag {
-	if usage == "" {
-		usage = "The `NUMBER` of entities to create"
-	}
-
-	return cli.StringFlag{
-		Name:   "number, n",
-		Usage:  usage,
-		EnvVar: "STEP_NUMBER",
-	}
-}
-
-// Prefix returns a flag for prefixing to the name of an entity during creation
-func Prefix(usage, value string) cli.Flag {
-	if usage == "" {
-		usage = "The `PREFIX` to apply to the names of all created entities"
-	}
-
-	return cli.StringFlag{
-		Name:   "prefix, p",
-		Usage:  usage,
-		Value:  value,
-		EnvVar: "STEP_PREFIX",
-	}
-}
-
-// OAuthProvider returns a flag for allowing the user to select an oauth provider
-func OAuthProvider(usage string, providers []string, value string) cli.Flag {
-	usage = fmt.Sprintf("%s (Options: %s)", usage, strings.Join(providers, ", "))
-	return cli.StringFlag{
-		Name:   "provider, idp",
-		Usage:  usage,
-		Value:  value,
-		EnvVar: "STEP_PROVIDER",
-	}
-}
-
-// Email returns a flag allowing the user to specify their email
-func Email(usage string) cli.Flag {
-	if usage == "" {
-		usage = "Email to use"
-	}
-
-	return cli.StringFlag{
-		Name:   "email, e",
-		Usage:  usage,
-		EnvVar: "STEP_EMAIL",
-	}
-}
-
-// Console returns a flag allowing the user to specify whether or not they want
-// to remain entirely in the console
-func Console(usage string) cli.Flag {
-	if usage == "" {
-		usage = "Whether or not to remain entirely in the console to complete the action"
-	}
-
-	return cli.BoolFlag{
-		Name:   "console, c",
-		Usage:  usage,
-		EnvVar: "STEP_CONSOLE",
-	}
-}
-
-// Limit returns a flag for limiting the results return by a command
-func Limit(usage string, value int) cli.Flag {
-	if usage == "" {
-		usage = "The maximum `NUMBER` of results to return"
-	}
-	if value == 0 {
-		value = 10
-	}
-
-	return cli.IntFlag{
-		Name:  "limit, l",
-		Usage: usage,
-		Value: value,
-	}
+// Force is a cli.Flag used to overwrite files.
+var Force = cli.BoolFlag{
+	Name:  "f,force",
+	Usage: "Force the overwrite of files without asking.",
 }

utils/write.go

@@ -10,6 +10,7 @@ import (
 	"syscall"
 
 	"github.com/pkg/errors"
+	"github.com/smallstep/cli/command"
 	"golang.org/x/crypto/ssh/terminal"
 )
 
@@ -21,19 +22,12 @@ var (
 	ErrIsDir = errors.New("file is a directory")
 )
 
-// WriteFile wraps ioutil.WriteFile with a prompt to overwrite a file if the
-// file exists. It returns ErrFileExists if the user picks to not overwrite
-// the file.
-func WriteFile(filename string, data []byte, perm os.FileMode) error {
-	return WriteFileForce(filename, data, perm, false)
-}
-
-// WriteFileForce wraps ioutil.WriteFile with a prompt to overwrite a file if
+// WriteFile wraps ioutil.WriteFile with a prompt to overwrite a file if
 // the file exists. It returns ErrFileExists if the user picks to not overwrite
 // the file. If force is set to true, the prompt will not be presented and the
 // file if exists will be overwritten.
-func WriteFileForce(filename string, data []byte, perm os.FileMode, force bool) error {
-	if force {
+func WriteFile(filename string, data []byte, perm os.FileMode) error {
+	if command.IsForce() {
 		return ioutil.WriteFile(filename, data, perm)
 	}