mirror of
https://github.com/Matir/skel.git
synced 2026-09-22 12:56:56 -07:00
50 lines
1.8 KiB
Bash
Executable File
50 lines
1.8 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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# Detect installed binaries
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HAS_DELTA=$(command -v delta 2>/dev/null || true)
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HAS_DIFFT=$(command -v difft 2>/dev/null || true)
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# ==============================================================================
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# MODE 1: GIT_EXTERNAL_DIFF / diff.external
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# Git passes exactly 7 arguments:
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# $1: path $2: old-file $3: old-hex $4: old-mode $5: new-file $6: new-hex $7: new-mode
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# ==============================================================================
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if [ "$#" -eq 7 ]; then
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DISPLAY_PATH="$1"
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OLD_FILE="$2"
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NEW_FILE="$5"
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# 1. Difftastic installed -> Native AST structural file comparison
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if [ -n "$HAS_DIFFT" ]; then
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# Pass file metadata and display path to difft
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exec difft --display=side-by-side-show-both "$OLD_FILE" "$NEW_FILE"
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# 2. Delta installed (Difftastic missing) -> Standard diff piped into delta
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elif [ -n "$HAS_DELTA" ]; then
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diff -u -p --label "a/$DISPLAY_PATH" "$OLD_FILE" --label "b/$DISPLAY_PATH" "$NEW_FILE" | delta
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# 3. Neither installed -> Standard unified diff
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else
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diff -u -p --label "a/$DISPLAY_PATH" "$OLD_FILE" --label "b/$DISPLAY_PATH" "$NEW_FILE" || true
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fi
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# ==============================================================================
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# MODE 2: GIT_PAGER / core.pager
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# Invoked as a downstream filter/pager for stdout (stdin contains diff/log output)
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# ==============================================================================
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else
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# 1. Delta installed -> Rich pager for git log, git show, git diff, etc.
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if [ -n "$HAS_DELTA" ]; then
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exec delta "$@"
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# 2. Difftastic installed (Delta missing) -> Read unified diff from stdin
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elif [ -n "$HAS_DIFFT" ]; then
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exec difft "$@"
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# 3. Neither installed -> Fall back to system pager
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else
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exec "${PAGER:-less}" ${LESS:--FRX} "$@"
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fi
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fi
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