Change logic of stdin input to be last and only if required

cmd/ipfs/init.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
@@ -33,7 +34,9 @@ environment variable:
     export IPFS_PATH=/path/to/ipfsrepo
 `,
 	},
-
+	Arguments: []cmds.Argument{
+		cmds.FileArg("default-config", false, false, "Initialize with the given configuration.").EnableStdin(),
+	},
 	Options: []cmds.Option{
 		cmds.IntOption("bits", "b", "Number of bits to use in the generated RSA private key.").Default(nBitsForKeypairDefault),
 		cmds.BoolOption("empty-repo", "e", "Don't add and pin help files to the local storage.").Default(false),
@@ -76,7 +79,24 @@ environment variable:
 			return
 		}
 
-		if err := doInit(os.Stdout, req.InvocContext().ConfigRoot, empty, nBitsForKeypair); err != nil {
+		var conf *config.Config
+
+		f := req.Files()
+		if f != nil {
+			confFile, err := f.NextFile()
+			if err != nil {
+				res.SetError(err, cmds.ErrNormal)
+				return
+			}
+
+			conf = &config.Config{}
+			if err := json.NewDecoder(confFile).Decode(conf); err != nil {
+				res.SetError(err, cmds.ErrNormal)
+				return
+			}
+		}
+
+		if err := doInit(os.Stdout, req.InvocContext().ConfigRoot, empty, nBitsForKeypair, conf); err != nil {
 			res.SetError(err, cmds.ErrNormal)
 			return
 		}
@@ -88,10 +108,10 @@ Reinitializing would overwrite your keys.
 `)
 
 func initWithDefaults(out io.Writer, repoRoot string) error {
-	return doInit(out, repoRoot, false, nBitsForKeypairDefault)
+	return doInit(out, repoRoot, false, nBitsForKeypairDefault, nil)
 }
 
-func doInit(out io.Writer, repoRoot string, empty bool, nBitsForKeypair int) error {
+func doInit(out io.Writer, repoRoot string, empty bool, nBitsForKeypair int, conf *config.Config) error {
 	if _, err := fmt.Fprintf(out, "initializing ipfs node at %s\n", repoRoot); err != nil {
 		return err
 	}
@@ -104,9 +124,12 @@ func doInit(out io.Writer, repoRoot string, empty bool, nBitsForKeypair int) err
 		return errRepoExists
 	}
 
-	conf, err := config.Init(out, nBitsForKeypair)
-	if err != nil {
-		return err
+	if conf == nil {
+		var err error
+		conf, err = config.Init(out, nBitsForKeypair)
+		if err != nil {
+			return err
+		}
 	}
 
 	if err := fsrepo.Init(repoRoot, conf); err != nil {

commands/cli/parse.go

@@ -244,15 +244,6 @@ func parseArgs(inputs []string, stdin *os.File, argDefs []cmds.Argument, recursi
 		stdin = nil
 	}
 
-	// check if stdin is coming from terminal or is being piped in
-	if stdin != nil {
-		if term, err := isTerminal(stdin); err != nil {
-			return nil, nil, err
-		} else if term {
-			stdin = nil // set to nil so we ignore it
-		}
-	}
-
 	// count required argument definitions
 	numRequired := 0
 	for _, argDef := range argDefs {
@@ -293,9 +284,18 @@ func parseArgs(inputs []string, stdin *os.File, argDefs []cmds.Argument, recursi
 			numRequired--
 		}
 
+		fillingVariadic := argDefIndex+1 > len(argDefs)
+
 		var err error
 		if argDef.Type == cmds.ArgString {
-			if stdin == nil {
+			if len(inputs) > 0 {
+				// If argument is "-" use stdin
+				if inputs[0] == "-" && argDef.SupportsStdin {
+					stringArgs, stdin, err = appendStdinAsString(stringArgs, stdin)
+					if err != nil {
+						return nil, nil, err
+					}
+				}
 				// add string values
 				stringArgs, inputs = appendString(stringArgs, inputs)
 			} else if !argDef.SupportsStdin {
@@ -307,35 +307,39 @@ func parseArgs(inputs []string, stdin *os.File, argDefs []cmds.Argument, recursi
 
 				stringArgs, inputs = appendString(stringArgs, inputs)
 			} else {
-				if len(inputs) > 0 {
-					// don't use stdin if we have inputs
-					stdin = nil
-				} else {
+				if stdin != nil && argDef.Required && !fillingVariadic {
 					// if we have a stdin, read it in and use the data as a string value
 					stringArgs, stdin, err = appendStdinAsString(stringArgs, stdin)
 					if err != nil {
 						return nil, nil, err
 					}
+				} else {
+					break
 				}
 			}
 		} else if argDef.Type == cmds.ArgFile {
-			if stdin == nil || !argDef.SupportsStdin {
+			if len(inputs) > 0 {
 				// treat stringArg values as file paths
 				fpath := inputs[0]
 				inputs = inputs[1:]
-				file, err := appendFile(fpath, argDef, recursive, hidden)
+				var file files.File
+				var err error
+				if fpath == "-" {
+					file = files.NewReaderFile("", "", stdin, nil)
+				} else {
+					file, err = appendFile(fpath, argDef, recursive, hidden)
+				}
 				if err != nil {
 					return nil, nil, err
 				}
 
 				fileArgs[fpath] = file
 			} else {
-				if len(inputs) > 0 {
-					// don't use stdin if we have inputs
-					stdin = nil
-				} else {
-					// if we have a stdin, create a file from it
+				if stdin != nil && argDef.SupportsStdin &&
+					argDef.Required && !fillingVariadic {
 					fileArgs[""] = files.NewReaderFile("", "", stdin, nil)
+				} else {
+					break
 				}
 			}
 		}
@@ -431,16 +435,3 @@ func appendFile(fpath string, argDef *cmds.Argument, recursive, hidden bool) (fi
 
 	return files.NewSerialFile(path.Base(fpath), fpath, hidden, stat)
 }
-
-// isTerminal returns true if stdin is a Stdin pipe (e.g. `cat file | ipfs`),
-// and false otherwise (e.g. nothing is being piped in, so stdin is
-// coming from the terminal)
-func isTerminal(stdin *os.File) (bool, error) {
-	stat, err := stdin.Stat()
-	if err != nil {
-		return false, err
-	}
-
-	// if stdin is a CharDevice, return true
-	return ((stat.Mode() & os.ModeCharDevice) != 0), nil
-}

test/bin/.gitignore

@@ -8,3 +8,4 @@
 !checkflags
 !continueyn
 !verify-go-fmt.sh
+!time-out

test/bin/time-out

@@ -0,0 +1,83 @@
+#!/bin/bash
+#
+# The Bash shell script executes a command with a time-out.
+# Upon time-out expiration SIGTERM (15) is sent to the process. If the signal
+# is blocked, then the subsequent SIGKILL (9) terminates it.
+#
+# Based on the Bash documentation example.
+
+scriptName="${0##*/}"
+
+declare -i DEFAULT_TIMEOUT=9
+declare -i DEFAULT_INTERVAL=1
+declare -i DEFAULT_DELAY=1
+
+# Timeout.
+declare -i timeout=DEFAULT_TIMEOUT
+# Interval between checks if the process is still alive.
+declare -i interval=DEFAULT_INTERVAL
+# Delay between posting the SIGTERM signal and destroying the process by SIGKILL.
+declare -i delay=DEFAULT_DELAY
+
+function printUsage() {
+    cat <<EOF
+
+Synopsis
+    $scriptName [-t timeout] [-i interval] [-d delay] command
+    Execute a command with a time-out.
+    Upon time-out expiration SIGTERM (15) is sent to the process. If SIGTERM
+    signal is blocked, then the subsequent SIGKILL (9) terminates it.
+
+    -t timeout
+        Number of seconds to wait for command completion.
+        Default value: $DEFAULT_TIMEOUT seconds.
+
+    -i interval
+        Interval between checks if the process is still alive.
+        Positive integer, default value: $DEFAULT_INTERVAL seconds.
+
+    -d delay
+        Delay between posting the SIGTERM signal and destroying the
+        process by SIGKILL. Default value: $DEFAULT_DELAY seconds.
+
+As of today, Bash does not support floating point arithmetic (sleep does),
+therefore all delay/time values must be integers.
+EOF
+}
+
+# Options.
+while getopts ":t:i:d:" option; do
+    case "$option" in
+        t) timeout=$OPTARG ;;
+        i) interval=$OPTARG ;;
+        d) delay=$OPTARG ;;
+        *) printUsage; exit 1 ;;
+    esac
+done
+shift $((OPTIND - 1))
+
+# $# should be at least 1 (the command to execute), however it may be strictly
+# greater than 1 if the command itself has options.
+if (($# == 0 || interval <= 0)); then
+    printUsage
+    exit 1
+fi
+
+# kill -0 pid   Exit code indicates if a signal may be sent to $pid process.
+(
+    ((t = timeout))
+
+    while ((t > 0)); do
+        sleep $interval
+        kill -0 $$ || exit 0
+        ((t -= interval))
+    done
+
+    # Be nice, post SIGTERM first.
+    # The 'exit 0' below will be executed if any preceeding command fails.
+    kill -s SIGTERM $$ && kill -0 $$ || exit 0
+    sleep $delay
+    kill -s SIGKILL $$
+) 2> /dev/null &
+
+exec "$@"

test/sharness/t0022-init-default.sh

@@ -0,0 +1,55 @@
+#!/bin/sh
+#
+# Copyright (c) 2014 Christian Couder
+# MIT Licensed; see the LICENSE file in this repository.
+#
+
+test_description="Test init command with default config"
+
+. lib/test-lib.sh
+
+cfg_key="Addresses.API"
+cfg_val="/ip4/0.0.0.0/tcp/5001"
+
+# test that init succeeds
+test_expect_success "ipfs init succeeds" '
+	export IPFS_PATH="$(pwd)/.ipfs" &&
+	echo "IPFS_PATH: \"$IPFS_PATH\"" &&
+	BITS="2048" &&
+	ipfs init --bits="$BITS" >actual_init ||
+	test_fsh cat actual_init
+'
+
+test_expect_success ".ipfs/config has been created" '
+	test -f "$IPFS_PATH"/config ||
+	test_fsh ls -al .ipfs
+'
+
+test_expect_success "ipfs config succeeds" '
+	ipfs config $cfg_flags "$cfg_key" "$cfg_val"
+'
+
+test_expect_success "ipfs read config succeeds" '
+    IPFS_DEFAULT_CONFIG=$(cat "$IPFS_PATH"/config)
+'
+
+test_expect_success "clean up ipfs dir" '
+	rm -rf "$IPFS_PATH"
+'
+
+test_expect_success "ipfs init default config succeeds" '
+	echo $IPFS_DEFAULT_CONFIG | ipfs init - >actual_init ||
+	test_fsh cat actual_init
+'
+
+test_expect_success "ipfs config output looks good" '
+	echo "$cfg_val" >expected &&
+	ipfs config "$cfg_key" >actual &&
+	test_cmp expected actual
+'
+
+test_launch_ipfs_daemon
+
+test_kill_ipfs_daemon
+
+test_done

test/sharness/t0500-issues-and-regressions-offline.sh

@@ -8,4 +8,10 @@ test_init_ipfs
 
 # Tests go here
 
+test_expect_success "ipfs init with occupied input works - #2748" '
+	export IPFS_PATH="ipfs_path"
+	echo "" | time-out ipfs init &&
+	rm -rf ipfs_path
+'
+
 test_done