From b1b3f1ead6cef2d0209d786f607d9402b5803fda Mon Sep 17 00:00:00 2001 From: Michael Date: Fri, 4 Sep 2020 19:46:20 +0100 Subject: [PATCH] first commit Signed-off-by: Michael --- .gitignore | 2 ++ LICENSE | 19 +++++++++++++++++++ README.md | 35 +++++++++++++++++++++++++++++++++++ main.go | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 102 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 README.md create mode 100644 main.go diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..877b511 --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +jpg2png +jpg2png.exe \ No newline at end of file diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..fc79b7b --- /dev/null +++ b/LICENSE @@ -0,0 +1,19 @@ +MIT License Copyright (c) 2020 Michael Lindman + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is furnished +to do so, subject to the following conditions: + +The above copyright notice and this permission notice (including the next +paragraph) shall be included in all copies or substantial portions of the +Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS +FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS +OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, +WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF +OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. \ No newline at end of file diff --git a/README.md b/README.md new file mode 100644 index 0000000..dcc40c9 --- /dev/null +++ b/README.md @@ -0,0 +1,35 @@ +# jpg2png + +golang app that renames incorrectly named jpg files to png by matching the file header + +## Usage + +```sh +go install github.com/michaellindman/jpg2png +jpg2png -dir /path/to/image/directory +renamed 176 jpg files png +``` + +## License + +```text +MIT License Copyright (c) 2020 Michael Lindman + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is furnished +to do so, subject to the following conditions: + +The above copyright notice and this permission notice (including the next +paragraph) shall be included in all copies or substantial portions of the +Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS +FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS +OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, +WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF +OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +``` diff --git a/main.go b/main.go new file mode 100644 index 0000000..46fe157 --- /dev/null +++ b/main.go @@ -0,0 +1,46 @@ +package main + +import ( + "bytes" + "flag" + "fmt" + "io/ioutil" + "log" + "os" + "path" + "path/filepath" + "strings" +) + +func main() { + dir := flag.String("dir", "", "directory to scan") + flag.Parse() + + files, err := ioutil.ReadDir(*dir) + if err != nil { + log.Fatal(err) + } + + pngheader := []byte{ + 0x89, 0x50, 0x4e, 0x47, 0xd, 0xa, 0x1a, 0xa, 0x0, + 0x0, 0x0, 0xd, 0x49, 0x48, 0x44, 0x52, 0x0, 0x0} + + var count int + for _, f := range files { + orig := *dir + "/" + f.Name() + new := *dir + "/" + strings.TrimSuffix(f.Name(), filepath.Ext(f.Name())) + ".png" + if path.Ext(f.Name()) == ".jpg" { + file, err := ioutil.ReadFile(orig) + if err != nil { + log.Fatal(err) + } + if bytes.Equal(file[:18], pngheader) == true { + if err := os.Rename(orig, new); err != nil { + log.Fatal(err) + } + count++ + } + } + } + fmt.Printf("renamed %d jpg files png\n", count) +}