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gitapply.sh: Use variables for awk scripts instead of inline code.

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This commit is contained in:
Sebastian Lackner 2014-08-07 17:02:37 +02:00
parent 2b2a8fac9a
commit c50689ab09
1 changed files with 44 additions and 17 deletions
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61
debian/tools/gitapply.sh vendored
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@ -130,7 +130,7 @@ for dependency in awk cut dd du grep gzip hexdump patch sha1sum; do
done
# Decode base85 git data, prepend with a gzip header
awk_b85='
awk_decode_b85='
BEGIN{
git="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
b85="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!#$%&()*+-;<=>?@^_`{|}~";
@ -162,7 +162,7 @@ BEGIN{
}'
# Decodes the information from a git delta patch passed in as hex encoded
awk_gitpatch='
awk_decode_binarypatch='
function get_byte(a, b){ # usage: get_byte()
if (length(__buffer) == 0){ if(getline __buffer <= 0){ exit 1; } }
a = index(hex, substr(__buffer, 1, 1));
@ -215,6 +215,43 @@ BEGIN{
printf("E 0 0\n");
}'
# Find end of patch header
awk_eof_header='
BEGIN{
ofs=1;
}
!/^(--- |\+\+\+ |old |new |copy |rename |similarity |index |GIT |literal |delta )/{
ofs=0; exit 0;
}
END{
print FNR+ofs;
}'
# Find end of text patch
awk_eof_textpatch='
BEGIN{
ofs=1;
}
!/^(@| |+|-|\\)/{
ofs=0; exit 0;
}
END{
print FNR+ofs;
}'
# Find end of git binary patch
awk_eof_binarypatch='
BEGIN{
ofs=1;
}
!/^[A-Za-z]/{
ofs=0; exit 0;
}
END{
print FNR+ofs;
}'
# Create a temporary file containing the patch - NOTE: even if the user
# provided a filename it still makes sense to work with a temporary file,
# to avoid changes of the content while this script is active.
@ -242,11 +279,7 @@ for offset in $(awk '/^diff --git /{ print FNR; }' "$tmpfile"); do
# Find out the size of the patch header
tmpoffset=$((offset + 1))
tmpoffset=$(sed -n "$tmpoffset,\$ p" "$tmpfile" |
awk '!/^(--- |\+\+\+ |old |new |copy |rename |similarity |index |GIT |literal |delta )/{ exit 42; } END{ print FNR; }')
if [ "$?" -ne 42 ]; then
tmpoffset=$((tmpoffset + 1))
fi
tmpoffset=$(sed -n "$tmpoffset,\$ p" "$tmpfile" | awk "$awk_eof_header")
hdroffset=$((offset + tmpoffset))
# Parse all important fields of the header
@ -303,10 +336,7 @@ for offset in $(awk '/^diff --git /{ print FNR; }' "$tmpfile"); do
if [ "$patch_is_binary" -eq 0 ]; then
# Find end of textual patch
tmpoffset=$(sed -n "$hdroffset,\$ p" "$tmpfile" | awk '!/^(@| |+|-|\\)/{ exit 42; } END{ print FNR; }')
if [ "$?" -ne 42 ]; then
tmpoffset=$((tmpoffset + 1))
fi
tmpoffset=$(sed -n "$hdroffset,\$ p" "$tmpfile" | awk "$awk_eof_textpatch")
lastoffset=$((hdroffset + tmpoffset - 1))
# Apply textual patch
@ -336,10 +366,7 @@ for offset in $(awk '/^diff --git /{ print FNR; }' "$tmpfile"); do
fi
# Find end of binary patch
tmpoffset=$(sed -n "$hdroffset,\$ p" "$tmpfile" | awk '!/^[A-Za-z]/{ exit 42; } END{ print FNR; }')
if [ "$?" -ne 42 ]; then
tmpoffset=$((tmpoffset + 1))
fi
tmpoffset=$(sed -n "$hdroffset,\$ p" "$tmpfile" | awk "$awk_eof_binarypatch")
lastoffset=$((hdroffset + tmpoffset - 1))
# Special case - deleting the whole file
@ -362,7 +389,7 @@ for offset in $(awk '/^diff --git /{ print FNR; }' "$tmpfile"); do
# Decode base85 and gzip compression
tmpoffset=$((lastoffset - 1))
sed -n "$hdroffset,$tmpoffset p" "$tmpfile" | awk "$awk_b85" | gzip -dc > "$literal_tmpfile" 2>/dev/null
sed -n "$hdroffset,$tmpoffset p" "$tmpfile" | awk "$awk_decode_b85" | gzip -dc > "$literal_tmpfile" 2>/dev/null
if [ "$patch_binary_size" -ne "$(filesize "$literal_tmpfile")" ]; then
rm "$literal_tmpfile"
abort "Uncompressed binary patch has wrong size."
@ -397,7 +424,7 @@ for offset in $(awk '/^diff --git /{ print FNR; }' "$tmpfile"); do
patch_binary_complete=1
else break; fi
done < <(hexdump -v -e '32/1 "%02X" "\n"' "$delta_tmpfile" | awk "$awk_gitpatch")
done < <(hexdump -v -e '32/1 "%02X" "\n"' "$delta_tmpfile" | awk "$awk_decode_binarypatch")
rm "$delta_tmpfile"