chore: translated automatically to Golang

3 files changed, 367 insertions, 0 deletions

diff --git a/explanation.md b/explanation.md
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+### Overall Explanation of the Code
+The provided Go code is a command-line utility designed to check the
+size of files passed as arguments and determine whether they should be
+compressed based on their size and file extension. The program utilizes
+the `gzip` command to compress files larger than 1 MB that do not have
+certain compressed file extensions. It also contains a configuration map
+(`URL_VARIANTS`) that allows the user to define different base URLs for
+various sections, although this part of the code is not actively used in
+the main logic.
+
+### Code Structure Overview
+- **Imports**: The code imports necessary packages for logging,
+  executing commands, handling file paths, and manipulating strings.
+- **Constants and Variables**:
+  - `COMPRESSED_EXTENSIONS`: A slice of strings representing file
+    extensions that are already considered compressed.
+  - `URL_VARIANTS`: A map that holds different configurations for
+    various sections, including base URLs and target URLs.
+- **Main Function**:
+  - Retrieves the command name and checks if it corresponds to any entry
+    in `URL_VARIANTS`.
+  - Validates that at least one file argument is provided.
+  - Iterates over each file argument, checks its size and extension, and
+    decides whether to compress it.
+- **Helper Function**:
+  - `contains`: Checks if a given item exists within a slice of strings.
+
+### Possible Bugs
+1. **Missing URL Variants Handling**: The code retrieves the
+   configuration for the command name but does not handle cases where the
+   command name does not exist in `URL_VARIANTS`, which could lead to
+   a `nil` dereference.
+2. **Error Handling**: The program exits with `os.Exit(1)` if no
+   arguments are provided, but it does not log a message indicating why it
+   exited, which could confuse users.
+3. **Compression Command**: The code assumes that the `gzip` command is
+   available in the system's PATH. If it is not, the program will fail
+   without a clear error message.
+
+### Possible Improvements
+1. **Error Messages**: Add more descriptive error messages when exiting
+   due to missing command variants or file arguments.
+2. **Configuration Validation**: Implement checks to ensure that the
+   `URL_VARIANTS` map contains the necessary keys before accessing them.
+3. **File Compression Feedback**: Provide feedback on successful
+   compression, such as logging the new file name created.
+4. **Command-Line Flags**: Consider using a command-line flag library to
+   improve argument parsing and provide help messages.
+
+### External Dependencies
+- The code relies on the `gzip` command-line utility for file
+  compression. It also uses standard Go libraries (`log`, `os`,
+  `os/exec`, `path/filepath`, `strconv`, and `strings`) which are part
+  of the Go standard library and do not require external installation.
+
+### Potential Security Concerns
+1. **Command Injection**: The use of `exec.Command` with user-provided
+   input could lead to command injection vulnerabilities if not properly
+   sanitized. Although the current implementation does not directly take
+   user input for command execution, it is a consideration for future
+   modifications.
+2. **File Permissions**: The program does not check for file permissions
+   before attempting to read or compress files, which could lead to
+   permission errors if the user does not have the necessary rights.
+3. **Resource Exhaustion**: If a large number of files are processed,
+   the program could exhaust system resources (e.g., memory or file
+   descriptors) if not properly managed, especially if the compression
+   command spawns many subprocesses.
+
+In summary, while the code serves its purpose of checking file sizes and
+compressing them as needed, it could benefit from improved error
+handling, validation, and security measures to enhance its robustness
+and usability.
+
+### Error Handling Analysis
+1. **Use of `log.Fatal`**: The code employs `log.Fatal(err)` to handle
+   errors, which logs the error message and exits the program. While this
+   is effective for critical failures, it does not allow for graceful
+   recovery or error reporting to the user.
+2. **Limited Error Context**: The error messages provided do not give
+   detailed context about where the error occurred, which can complicate
+   debugging.
+3. **Exit on Missing Arguments**: The program exits with `os.Exit(1)` if
+   no arguments are provided, which is a straightforward approach but could
+   be improved by providing a user-friendly message indicating the expected
+   usage.
+
+### Concurrency and Threading
+1. **Single-threaded Execution**: The code processes files sequentially
+   without any concurrency or parallelism. For large numbers of files, this
+   could lead to performance bottlenecks.
+2. **Potential for Blocking**: The use of `exec.Command` to run external
+   commands (like `gzip`) can block the main thread until the command
+   completes, further impacting performance.
+
+### Refactoring Suggestions
+1. **Error Handling Improvement**: Instead of using `log.Fatal`,
+   consider returning errors to the caller or logging them with more
+   context. This would allow for better error management and user feedback.
+2. **Command Execution Handling**: Wrap the command execution in
+   a function that can handle retries or provide more detailed error
+   messages.
+3. **Concurrency Implementation**: Introduce goroutines to process files
+   concurrently, which would significantly improve performance when dealing
+   with multiple files.
+4. **Configuration Management**: Consider externalizing the
+   `URL_VARIANTS` configuration to a separate file or environment variables
+   for easier management and updates.
+
+### Comparisons with Best Practices
+1. **Logging Practices**: While logging is used, it could be enhanced by
+   including timestamps and log levels (info, warning, error) for better
+   traceability.
+2. **Function Modularity**: The `main` function is doing multiple tasks
+   (argument parsing, file processing, logging), which could be broken down
+   into smaller, more focused functions to improve readability and
+   maintainability.
+3. **Use of Constants**: The use of constants for file extensions is
+   good practice, but consider using a more descriptive name for
+   `COMPRESSED_EXTENSIONS` to clarify its purpose.
+
+### Collaboration and Readability
+1. **Code Comments**: The code includes some comments, but they could be
+   expanded to explain the purpose of functions and complex logic, making
+   it easier for collaborators to understand.
+2. **Descriptive Variable Names**: Variable names like `cmdname` and
+   `processedFile` are reasonably descriptive, but further clarity could be
+   added by using more context-specific names.
+3. **Error Messages**: Providing more informative error messages would
+   enhance collaboration, as other developers would have a clearer
+   understanding of issues that arise.
+4. **Documentation**: Including a README or documentation that explains
+   how to use the program, its dependencies, and its configuration would
+   greatly benefit other developers and users.
+
+Overall, while the code is functional, there are several areas for
+improvement in error handling, concurrency, and readability that could
+enhance its robustness and maintainability.
diff --git a/tmp.go b/tmp.go
new file mode 100644
index 0000000..612fc51
--- /dev/null
+++ b/tmp.go
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+package main
+
+import (
+	"fmt"
+	"log"
+	"net/url"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+)
+
+var COMPRESSED_EXTENSIONS = []string{".jpg", ".webm", ".ogg", ".gz", ".bz2", ".zip",
+	".xz", ".odp", ".odt", ".ods", ".mp4", ".mp3",
+	".png", ".pdf", ".apk", ".rpm", ".epub", ".mkv",
+	".avi", ".jar", ".opus", ".ogv", ".flac", ".msi",
+	".m4a"}
+
+var URL_VARIANTS = map[string]map[string]string{
+	"wotan": {
+		"base_url":   "wotan:Export/",
+		"target_url": "https://w3.suse.de/~mcepl/",
+	},
+	"tmp": {
+		"base_url":   "fedorapeople.org:public_html/tmp/",
+		"target_url": "https://mcepl.fedorapeople.org/tmp/",
+		// "shorten_api": "http://is.gd/create.php?format=simple&url="
+		"shorten_api": "https://da.gd/s?url=",
+	},
+}
+
+func contains(slice []string, item string) bool {
+	for _, a := range slice {
+		if a == item {
+			return true
+		}
+	}
+	return false
+}
+
+func main() {
+	if len(os.Args) < 2 {
+		os.Exit(1)
+	}
+
+	cmdname := strings.ToLower(filepath.Base(os.Args[0]))
+	config := URL_VARIANTS[cmdname]
+
+	if _, err := os.Stat(os.Args[1]); os.IsNotExist(err) {
+		os.Exit(1)
+	}
+
+	for _, processedFile := range os.Args[1:] {
+		st, err := os.Stat(processedFile)
+		if err != nil {
+			log.Fatal(err)
+		}
+		fileExt := filepath.Ext(processedFile)
+		log.Printf("size of %s is %d.", processedFile, st.Size())
+		log.Printf("extension is %s", fileExt)
+
+		var fname string
+		var COMPRESSED bool
+
+		if st.Size() > 1000000 && !contains(COMPRESSED_EXTENSIONS, strings.ToLower(fileExt)) {
+			log.Printf("file %s should be compressed (%d b)", processedFile, st.Size())
+			err := exec.Command("gzip", "--keep", "--best", processedFile).Run()
+			if err != nil {
+				log.Fatal("Compressing the file failed!")
+			}
+			fname = processedFile + ".gz"
+			COMPRESSED = true
+		} else {
+			log.Printf("file %s should not be compressed (%d b)", processedFile, st.Size())
+			fname = processedFile
+			COMPRESSED = false
+		}
+
+		err = os.Chmod(fname, 0o644)
+		if err != nil {
+			log.Fatal(err)
+		}
+		modifiedFname := strings.Replace(fname, ":", "_", 1)
+		err = os.Rename(fname, modifiedFname)
+		if err != nil {
+			log.Fatal(err)
+		}
+		log.Printf("Unshorten fname = %s", modifiedFname)
+
+		_, err = exec.Command("scp", modifiedFname, config["base_url"]).Output()
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		targetURL := config["target_url"] + filepath.Base(modifiedFname)
+		safeTargetURL := url.QueryEscape(targetURL)
+		safeTargetURL = strings.Replace(safeTargetURL, "%3A", ":", 1)
+		fmt.Println(safeTargetURL)
+
+		if shortenAPI, ok := config["shorten_api"]; ok {
+			shortenedURLBytes, err := exec.Command("curl", "-s", shortenAPI+safeTargetURL).Output()
+			if err != nil {
+				log.Fatal(err)
+			}
+			shortenedURL := strings.TrimSpace(string(shortenedURLBytes))
+			fmt.Println(shortenedURL)
+		}
+
+		if COMPRESSED {
+			os.Remove(modifiedFname)
+		} else {
+			os.Rename(modifiedFname, fname)
+		}
+	}
+}
diff --git a/tmp.py b/tmp.py
new file mode 100755
index 0000000..67e0145
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+++ b/tmp.py
@@ -0,0 +1,114 @@
+#!/usr/bin/python3
+#
+# "THE BEER-WARE LICENSE" (Revision 42):
+# Matěj Cepl, <mcepl@cepl.eu> wrote this file.  As long as you retain
+# this notice you can do whatever you want with this stuff. If we meet
+# some day, and you think this stuff is worth it, you can buy me a beer
+# in return.   Matěj Cepl
+#
+# Instructions for setting up appropriate folders on
+# file.rdu.redhat.com see https://mojo.redhat.com/docs/DOC-14590
+# See also variable URL_VARIANTS below for necessary configuration.
+
+import logging
+import os
+import os.path
+import subprocess
+import sys
+import urllib.parse
+logging.basicConfig(format='%(levelname)s:%(funcName)s:%(message)s',
+                    level=logging.INFO)
+
+COMPRESSED_EXTENSIONS = ['.jpg', '.webm', '.ogg', '.gz', '.bz2', '.zip',
+                         '.xz', '.odp', '.odt', '.ods', '.mp4', '.mp3',
+                         '.png', '.pdf', '.apk', '.rpm', '.epub', '.mkv',
+                         '.avi', '.jar', '.opus', '.ogv', '.flac', '.msi',
+                         '.m4a']
+
+# THE VARIABLE URL_VARIANTS IS MEANT TO BE EDITED. Change various
+# attributes to correspond to your situation.
+# If new section is added (as here I have also 'tmp' for fedorapeople.org)
+# and the script has a symlink named as the section (so I have tmp as
+# a symlink to this script) it saves the file to the location defined in
+# such section when called under the other name.
+# So, `tmp filename` saves file filename to fedorapeople for me.
+URL_VARIANTS = {
+    'barstool': {
+        'base_url': 'mcepl@shell.eng.rdu.redhat.com:public_html/',
+        'target_url': 'http://file.rdu.redhat.com/~mcepl/',
+        'shorten_api': 'https://url.corp.redhat.com/new?'
+    },
+    'wotan': {
+        'base_url': 'wotan:Export/',
+        'target_url': 'https://w3.suse.de/~mcepl/'
+    },
+    'tmp': {
+        'base_url': 'fedorapeople.org:public_html/tmp/',
+        'target_url': 'https://mcepl.fedorapeople.org/tmp/',
+        # 'shorten_api': 'http://is.gd/create.php?format=simple&url='
+        'shorten_api': 'https://da.gd/s?url='
+    }
+}
+
+cmdname = os.path.basename(sys.argv[0]).lower()
+config = URL_VARIANTS[cmdname]
+
+if not os.path.exists(sys.argv[1]):
+    sys.exit(1)
+
+for processed_file in sys.argv[1:]:
+    st = os.stat(processed_file).st_size
+    file_ext = os.path.splitext(processed_file)[1]
+    logging.debug('size of {} is {:,}.'.format(processed_file, st))
+    logging.debug('extension is {}'.format(file_ext))
+    if st > 1000000 and file_ext.lower() not in COMPRESSED_EXTENSIONS:
+        logging.debug(
+            "file {} should be compressed ({:,} b)".format(
+                processed_file, st))
+        try:
+            ret = subprocess.check_call(
+                ['gzip', '--keep', '--best', processed_file])
+        except subprocess.CalledProcessError:
+            logging.error('Compressing the file failed!')
+            raise
+        fname = processed_file + '.gz'
+        COMPRESSED = True
+    else:
+        logging.debug(
+            'file {} should not be compressed ({:,} b)'.format(
+                processed_file, st))
+        fname = processed_file
+        COMPRESSED = False
+
+    os.chmod(fname, 0o0644)
+
+    # To make scp happy
+    modified_fname = fname.replace(':', '_')
+    os.rename(fname, modified_fname)
+
+    logging.debug('Unshorten fname = {}'.format(modified_fname))
+
+    subprocess.check_call(['scp', '{}'.format(modified_fname),
+                          config['base_url']])
+
+    target_URL = config['target_url'] + os.path.basename(modified_fname)
+
+    # Make target_URL into a safe URL
+    safe_target_URL = urllib.parse.quote(target_URL).replace('%3A', ':', 1)
+
+    print(safe_target_URL)
+
+    # curl -s 'http://is.gd/create.php?format=simple&url=www.example.com'
+    # http://is.gd/MOgh5q
+
+    if 'shorten_api' in config:
+        shortened_URL = subprocess.check_output(
+            ['curl', '-s', config['shorten_api'] +
+            safe_target_URL]).decode().strip()
+        print(shortened_URL)
+
+    # The script should have no side-effects
+    if COMPRESSED:
+        os.unlink(modified_fname)
+    else:
+        os.rename(modified_fname, fname)