3ed0a9d9ff
Fixes date command errors on macOS with Homebrew GNU coreutils: - 'date: invalid option -- v' when GNU date runs BSD syntax - 'syntax error in expression' when stat returns filesystem metadata Changes: - Replace uname-based detection with capability detection (try/fallback) - Try GNU commands first, fall back to BSD, then ultimate fallbacks - Add date -r fallback for file mtime (most portable) This handles mixed environments where uname returns "Darwin" but GNU coreutils are in PATH from Homebrew. Credit: @farce1 (PR #119)
53 lines
1.8 KiB
Bash
53 lines
1.8 KiB
Bash
#!/usr/bin/env bash
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# date_utils.sh - Cross-platform date utility functions
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# Provides consistent date formatting and arithmetic across GNU (Linux) and BSD (macOS) systems
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# Get current timestamp in ISO 8601 format with seconds precision
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# Returns: YYYY-MM-DDTHH:MM:SS+00:00 format
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# Uses capability detection instead of uname to handle macOS with Homebrew coreutils
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get_iso_timestamp() {
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# Try GNU date first (works on Linux and macOS with Homebrew coreutils)
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local result
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if result=$(date -u -Iseconds 2>/dev/null) && [[ -n "$result" ]]; then
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echo "$result"
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return
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fi
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# Fallback to BSD date (native macOS) - add colon to timezone offset
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date -u +"%Y-%m-%dT%H:%M:%S%z" | sed 's/\(..\)$/:\1/'
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}
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# Get time component (HH:MM:SS) for one hour from now
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# Returns: HH:MM:SS format
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# Uses capability detection instead of uname to handle macOS with Homebrew coreutils
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get_next_hour_time() {
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# Try GNU date first (works on Linux and macOS with Homebrew coreutils)
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if date -d '+1 hour' '+%H:%M:%S' 2>/dev/null; then
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return
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fi
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# Fallback to BSD date (native macOS)
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if date -v+1H '+%H:%M:%S' 2>/dev/null; then
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return
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fi
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# Ultimate fallback - compute using epoch arithmetic
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local future_epoch=$(($(date +%s) + 3600))
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date -r "$future_epoch" '+%H:%M:%S' 2>/dev/null || date '+%H:%M:%S'
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}
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# Get current timestamp in a basic format (fallback)
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# Returns: YYYY-MM-DD HH:MM:SS format
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get_basic_timestamp() {
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date '+%Y-%m-%d %H:%M:%S'
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}
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# Get current Unix epoch time in seconds
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# Returns: Integer seconds since 1970-01-01 00:00:00 UTC
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get_epoch_seconds() {
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date +%s
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}
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# Export functions for use in other scripts
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export -f get_iso_timestamp
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export -f get_next_hour_time
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export -f get_basic_timestamp
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export -f get_epoch_seconds
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