increment ATMOS_SHLVL each time atmos terraform shell is called #803
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Signed-off-by: Pulak Kanti Bhowmick <[email protected]>
Signed-off-by: Pulak Kanti Bhowmick <[email protected]>
📝 WalkthroughWalkthroughThe changes in this pull request enhance the Changes
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Actionable comments posted: 1
🧹 Outside diff range and nitpick comments (2)
website/docs/cli/commands/terraform/terraform-shell.mdx (1)
42-44: Consider enhancing the documentation with additional details.The documentation could be even more helpful with these additions:
- Add an example showing the
ATMOS_SHLVLbehavior:- If ATMOS_SHLVL is already set, it increments the value by 1 for each new shell. + +For example: +```shell +$ echo $ATMOS_SHLVL +1 +$ atmos terraform shell component-1 -s stack-1 +$ echo $ATMOS_SHLVL +2 +```
- Document what happens to
ATMOS_SHLVLwhen exiting the shell- Clarify if there's a maximum nesting level
internal/exec/shell_utils.go (1)
154-165: Consider adding bounds checking for ATMOS_SHLVL.While the implementation correctly handles the basic case, consider adding validation for edge cases:
- Negative values should be normalized to 0 before incrementing
- Consider adding an upper bound (e.g., 1000) to prevent potential integer overflow
Here's a suggested improvement:
atmosShellLvl := os.Getenv("ATMOS_SHLVL") atmosShellVal := 1 if atmosShellLvl != "" { val, err := strconv.Atoi(atmosShellLvl) if err != nil { return err } + // Normalize negative values + if val < 0 { + val = 0 + } + // Prevent integer overflow + if val >= 1000 { + return fmt.Errorf("ATMOS_SHLVL value too high: %d", val) + } atmosShellVal = val + 1 }
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📒 Files selected for processing (2)
internal/exec/shell_utils.go(2 hunks)website/docs/cli/commands/terraform/terraform-shell.mdx(1 hunks)
🔇 Additional comments (3)
website/docs/cli/commands/terraform/terraform-shell.mdx (1)
42-44: LGTM! Clear and concise documentation of the ATMOS_SHLVL behavior.
The documentation effectively explains how the ATMOS_SHLVL environment variable tracks shell nesting levels, making it clear for users to understand the behavior.
internal/exec/shell_utils.go (2)
12-12: LGTM! Clean import addition.
The strconv import is correctly placed and necessary for the new ATMOS_SHLVL parsing functionality.
154-171: Verify test coverage and usage.
Let's ensure proper test coverage exists and check for other uses of ATMOS_SHLVL:
Signed-off-by: Pulak Kanti Bhowmick <[email protected]>
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🧹 Outside diff range and nitpick comments (1)
internal/exec/shell_utils.go (1)
154-186: Consider extracting ATMOS_SHLVL management into helper functions.The ATMOS_SHLVL management logic could be more modular and reusable. Consider extracting it into helper functions:
+// incrementAtmosShellLevel increments ATMOS_SHLVL and returns any error +func incrementAtmosShellLevel() error { + atmosShellLvl := os.Getenv("ATMOS_SHLVL") + atmosShellVal := 1 + if atmosShellLvl != "" { + val, err := strconv.Atoi(atmosShellLvl) + if err != nil { + return err + } + atmosShellVal = val + 1 + } + return os.Setenv("ATMOS_SHLVL", fmt.Sprintf("%d", atmosShellVal)) +} + +// decrementAtmosShellLevel decrements ATMOS_SHLVL and logs any errors +func decrementAtmosShellLevel(cliConfig schema.CliConfiguration) { + atmosShellLvl := os.Getenv("ATMOS_SHLVL") + if atmosShellLvl == "" { + return + } + val, err := strconv.Atoi(atmosShellLvl) + if err != nil { + u.LogWarning(cliConfig, fmt.Sprintf("Failed to parse ATMOS_SHLVL: %v", err)) + return + } + newVal := val - 1 + if newVal < 0 { + newVal = 0 + } + if err := os.Setenv("ATMOS_SHLVL", fmt.Sprintf("%d", newVal)); err != nil { + u.LogWarning(cliConfig, fmt.Sprintf("Failed to update ATMOS_SHLVL: %v", err)) + } +}Then in
execTerraformShellCommand:- atmosShellLvl := os.Getenv("ATMOS_SHLVL") - atmosShellVal := 1 - if atmosShellLvl != "" { - val, err := strconv.Atoi(atmosShellLvl) - if err != nil { - return err - } - atmosShellVal = val + 1 - } - if err := os.Setenv("ATMOS_SHLVL", fmt.Sprintf("%d", atmosShellVal)); err != nil { - return err - } + if err := incrementAtmosShellLevel(); err != nil { + return err + } // decrement the value after exiting the shell defer func() { - atmosShellLvl := os.Getenv("ATMOS_SHLVL") - if atmosShellLvl == "" { - return - } - val, err := strconv.Atoi(atmosShellLvl) - if err != nil { - u.LogWarning(cliConfig, fmt.Sprintf("Failed to parse ATMOS_SHLVL: %v", err)) - return - } - newVal := val - 1 - if newVal < 0 { - newVal = 0 - } - if err := os.Setenv("ATMOS_SHLVL", fmt.Sprintf("%d", newVal)); err != nil { - u.LogWarning(cliConfig, fmt.Sprintf("Failed to update ATMOS_SHLVL: %v", err)) - } + decrementAtmosShellLevel(cliConfig) }()This refactoring would:
- Make the code more maintainable and reusable
- Simplify testing of the ATMOS_SHLVL logic
- Improve readability of the main function
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internal/exec/shell_utils.go(2 hunks)
🔇 Additional comments (2)
internal/exec/shell_utils.go (2)
167-186: Excellent implementation of error handling in defer block!
The code successfully addresses all the concerns raised in the previous review:
- Proper error handling for parsing ATMOS_SHLVL
- Prevention of negative values
- Warning logs for errors
- Early returns on invalid states
154-165: LGTM! Implementation matches Bash's SHLVL behavior.
The code correctly handles the ATMOS_SHLVL initialization and increment logic with proper error handling.
Let's verify that the behavior matches Bash's SHLVL:
✅ Verification successful
ATMOS_SHLVL implementation is correct and well-documented
The implementation perfectly aligns with the documented behavior in the docs:
- Initializes to 1 when not set
- Increments by 1 for each new shell
- Includes proper error handling and cleanup
The code matches the documented behavior in website/docs/cli/commands/terraform/terraform-shell.mdx, and the implementation in internal/exec/shell_utils.go follows the same pattern as Bash's SHLVL, making it familiar to users.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Compare ATMOS_SHLVL behavior with Bash's SHLVL
# Test: Search for SHLVL usage in shell scripts to understand standard patterns
rg -g '*.sh' 'SHLVL' -A 3 -B 3
Length of output: 30
Script:
#!/bin/bash
# Let's verify the ATMOS_SHLVL implementation by checking:
# 1. All references to ATMOS_SHLVL in the codebase
# 2. The shell execution context where it's used
# 3. Any tests that verify this behavior
# Search for all ATMOS_SHLVL references
echo "=== ATMOS_SHLVL References ==="
rg "ATMOS_SHLVL"
# Check the shell execution context
echo -e "\n=== Shell Execution Context ==="
ast-grep --pattern 'func execTerraformShellCommand($$$) {
$$$
}'
# Look for related test files
echo -e "\n=== Related Test Files ==="
fd "shell.*test\.go$"
Length of output: 1297
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@pkbhowmick please add screenshots to demonstrate functionality |
Co-authored-by: Erik Osterman (CEO @ Cloud Posse) <[email protected]>
Co-authored-by: Erik Osterman (CEO @ Cloud Posse) <[email protected]>
Co-authored-by: Erik Osterman (CEO @ Cloud Posse) <[email protected]>
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Here is the working demo @osterman |
Co-authored-by: Erik Osterman (CEO @ Cloud Posse) <[email protected]>
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These changes were released in v1.112.0. |
what
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Summary by CodeRabbit
New Features
ATMOS_SHLVLenvironment variable for improved shell command execution.ATMOS_SHLVLwith each new shell instance to track nesting levels.Documentation
atmos terraform shellcommand to clarify the newATMOS_SHLVLfunctionality and its impact on shell nesting levels.