24 lines
1.3 KiB
Bash
24 lines
1.3 KiB
Bash
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#!/bin/sh
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# Self-diagnosis source: many CLIs print their own corrected invocation
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# in their error output (git's --set-upstream hint, apt's "did you
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# mean", etc.).
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#
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# IMPORTANT: this must NOT cache the literal suggested line -- that
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# reintroduces the exact-key staleness problem (e.g. "git push" learned
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# once on branch A silently misapplies its captured --set-upstream on
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# branch B, and B never actually gets pushed). Instead it emits a
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# function that shadows the whole program and re-derives the suggestion
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# from *live* output on every call, the same trick proven to generalize
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# correctly across branches/arguments in practice. One taught fix this
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# way covers every future self-diagnosing failure from that program, not
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# just the one instance that happened to trigger the teaching prompt.
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cmd="$1"
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prog=$(printf '%s' "$cmd" | awk '{print $1}')
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[ -n "$prog" ] || exit 0
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[ -n "$FX_OUTPUT" ] || exit 0
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printf '%s\n' "$FX_OUTPUT" | grep -qE "^[[:space:]]*${prog}[[:space:]]" || exit 0
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cat <<FIX
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${prog}(){ out=\$(command ${prog} "\$@" 2>&1); ec=\$?; if [ \$ec -ne 0 ]; then sug=\$(printf '%s\\n' "\$out" | grep -E "^[[:space:]]*${prog}[[:space:]]" | sed 's/^[[:space:]]*//' | tail -1); if [ -n "\$sug" ]; then eval "command \$sug"; return \$?; fi; fi; printf '%s\\n' "\$out"; return \$ec; }
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FIX
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