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57 lines
1.8 KiB
57 lines
1.8 KiB
1 year ago
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#!/bin/sh
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# This spell will teach you the basics of Bash scripting best practices and optimization techniques
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echo "The magic of scripting can be improved with the following best practices and optimization techniques:"
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# 1. Use shebang
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# Always use the shebang line (#!/bin/sh or #!/bin/bash) at the top of your script to specify the interpreter.
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# 2. Use single quotes for strings
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# Use single quotes for strings to prevent variable and command substitution.
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string='Hello, World!'
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echo $string # This will print 'Hello, World!'
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# 3. Avoid using unnecessary subshells
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# Avoid using subshells by using command substitution with $() instead of backticks `` or $(command).
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result=$(command) # Better
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result=`command` # Not recommended
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# 4. Use double quotes for variables
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# Use double quotes for variables to prevent word splitting and globbing.
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name="John Doe"
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echo "My name is $name" # This will print 'My name is John Doe'
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# 5. Declare variables as local
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# Declare variables as local when they are only used within a function.
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my_function() {
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local my_variable="Hello, World!"
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echo $my_variable
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}
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my_function
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# 6. Use the -e option for echo
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# Use the -e option for echo to enable the interpretation of backslash escapes.
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echo -e "This is a new line \nThis is a tab \t"
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# 7. Use the -n option for echo
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# Use the -n option for echo to suppress the trailing newline.
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echo -n "Hello, "; echo "World!" # This will print 'Hello, World!' on the same line
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# 8. Use the -x option for debugging
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# Use the -x option to debug your script by displaying commands and their arguments as they are executed.
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# 9. Use the -u option for undefined variables
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# Use the -u option to catch references to uninitialized variables.
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# 10. Use the -o option for options
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# Use the -o option to enable or disable options within a script.
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echo "Spell cast successfully"
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