Add --output (in one file mode)

Writes output to another file

Author: mblaschke

README.md

@@ -17,34 +17,21 @@ Usage:
   goreplace
 
 Application Options:
-  -m, --mode=[replace|line|lineinfile|template] replacement mode - replace:
-                                                replace match with term; line:
-                                                replace line with term;
-                                                lineinfile: replace line with
-                                                term or if not found append to
-                                                term to file; template: parse
-                                                content as golang template,
-                                                search value have to start
-                                                uppercase (default: replace)
+  -m, --mode=[replace|line|lineinfile|template] replacement mode - replace: replace match with term; line: replace line with term; lineinfile: replace line with term or if not found append to term to file; template:
+                                                parse content as golang template, search value have to start uppercase (default: replace)
   -s, --search=                                 search term
   -r, --replace=                                replacement term
-  -i, --case-insensitive                        ignore case of pattern to match
-                                                upper and lowercase characters
+  -i, --case-insensitive                        ignore case of pattern to match upper and lowercase characters
       --stdin                                   process stdin as input
-      --once=[keep|unique]                      replace search term only one in
-                                                a file, keep duplicaes (keep,
-                                                default) or remove them (unique)
+  -o, --output=                                 write changes to this file (in one file mode)
+      --once=[keep|unique]                      replace search term only one in a file, keep duplicaes (keep, default) or remove them (unique)
       --regex                                   treat pattern as regex
-      --regex-backrefs                          enable backreferences in
-                                                replace term
+      --regex-backrefs                          enable backreferences in replace term
       --regex-posix                             parse regex term as POSIX regex
       --path=                                   use files in this path
-      --path-pattern=                           file pattern (* for wildcard,
-                                                only basename of file)
+      --path-pattern=                           file pattern (* for wildcard, only basename of file)
       --path-regex=                             file pattern (regex, full path)
-      --ignore-empty                            ignore empty file list,
-                                                otherwise this will result in
-                                                an error
+      --ignore-empty                            ignore empty file list, otherwise this will result in an error
   -v, --verbose                                 verbose mode
       --dry-run                                 dry run mode
   -V, --version                                 show version and exit
@@ -91,7 +78,7 @@ go-replace --mode=template daemon.conf
 ## Installation
 
 ```bash
-GOREPLACE_VERSION=0.5.3 \
+GOREPLACE_VERSION=0.5.4 \
 && wget -O /usr/local/bin/go-replace https://github.com/webdevops/goreplace/releases/download/$GOREPLACE_VERSION/gr-64-linux \
 && chmod +x /usr/local/bin/go-replace
 ```

goreplace.go

@@ -17,7 +17,7 @@ import (
 
 const (
     Author  = "webdevops.io"
-    Version = "0.5.2"
+    Version = "0.5.4"
 )
 
 type changeset struct {
@@ -53,6 +53,7 @@ var opts struct {
     Replace                 []string `short:"r"  long:"replace"                       description:"replacement term" `
     CaseInsensitive         bool     `short:"i"  long:"case-insensitive"              description:"ignore case of pattern to match upper and lowercase characters"`
     Stdin                   bool     `           long:"stdin"                         description:"process stdin as input"`
+    Output                  string   `short:"o"  long:"output"                        description:"write changes to this file (in one file mode)"`
     Once                    string   `           long:"once"                          description:"replace search term only one in a file, keep duplicaes (keep, default) or remove them (unique)" optional:"true" optional-value:"keep" choice:"keep" choice:"unique"`
     Regex                   bool     `           long:"regex"                         description:"treat pattern as regex"`
     RegexBackref            bool     `           long:"regex-backrefs"                description:"enable backreferences in replace term"`
@@ -223,7 +224,15 @@ func writeContentToFile(fileitem fileitem, content bytes.Buffer) (string, bool)
         return content.String(), true
     } else {
         var err error
-        err = ioutil.WriteFile(fileitem.Path, content.Bytes(), 0)
+
+        filepath := fileitem.Path
+
+        // --output
+        if (opts.Output != "") {
+            filepath = opts.Output
+        }
+
+        err = ioutil.WriteFile(filepath, content.Bytes(), 0644)
         if err != nil {
             panic(err)
         }
@@ -388,6 +397,11 @@ func handleSpecialCliOptions(args []string) ([]string) {
         })
     }
 
+    // --output
+    if (opts.Output != "" && len(args) > 1) {
+        logFatalErrorAndExit(errors.New("Only one file is allowed when using --output"), 1)
+    }
+
     return args
 }
 

tests/main.test

@@ -450,11 +450,40 @@ Testing template mode:
   > this is the third foobar line
   > this is the last line
   > EOF
-  $ cat test.txt | goreplace --mode=template --stdin -s Foobar -r ___xxx test.txt
+  $ cat test.txt | goreplace --mode=template --stdin -s Foobar -r ___xxx
   23<45
   ___xxx
   this is a testline
   this is the second line
   this is the third foobar line
   this is the last line
 
+Testing with output:
+
+  $ cat > test.txt <<EOF
+  > this is a testline
+  > this is the second line
+  > this is the third foobar line
+  > this is the last line
+  > EOF
+  $ goreplace -s foobar -r ___xxx test.txt --output test.output
+  $ cat test.output
+  this is a testline
+  this is the second line
+  this is the third ___xxx line
+  this is the last line
+
+Testing with output:
+
+  $ cat > test.txt <<EOF
+  > this is a testline
+  > this is the second line
+  > this is the third foobar line
+  > this is the last line
+  > EOF
+  $ cp test.txt test2.txt
+  $ goreplace -s foobar -r ___xxx test.txt test2.txt --output test.output
+  Error: Only one file is allowed when using --output
+  
+  [1]
+