author | Tero Marttila <terom@paivola.fi> |
Tue, 17 Dec 2013 02:06:53 +0200 | |
branch | dns-new |
changeset 85 | 4ad9c9b7cd0e |
parent 84 | 77df429f63a3 |
child 87 | cb4607af8663 |
permissions | -rw-r--r-- |
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lib/update: add shebangs to make sloccount work
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#!/bin/bash |
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# vim: set ft=sh : |
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# |
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# Dependency-based updates + utils |
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## Compare the given output file with all given source files: |
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# |
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# check_update $out ${deps[@]} && do_update $out ... || ... |
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# |
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# Returns true if the output file needs to be updated. |
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function check_update { |
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# target |
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local out="$1"; shift |
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debug "$out" |
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# need update? |
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local update= |
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if [ ${#@} == 0 ]; then |
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debug " update: unknown deps" |
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update=y |
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elif [ ! -e "$out" ]; then |
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debug " update: dest missing" |
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update=y |
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|
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elif [ $UPDATE_FORCE ]; then |
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debug " update: forced" |
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update=y |
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fi |
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|
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# check deps |
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for dep in "$@"; do |
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# don't bother checking if already figured out |
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[ $update ] && continue |
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# check |
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if [ ! -e "$dep" ]; then |
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warn "$out: Missing source: $dep" |
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elif [ "$out" -ot "$dep" ]; then |
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debug " update: $dep" |
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update=y |
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else |
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debug " check: $dep" |
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fi |
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done |
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[ ! $update ] && debug " up-to-date" |
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# return |
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[ $update ] |
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} |
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## Generate updated output file from given command's stdout: |
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# |
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# do_update $out $BIN/cmd --args |
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# |
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# Writes output to a temporary .new file, optionally shows a diff of changes, and commits |
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# the new version to $out (unless noop'd). |
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function do_update { |
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local out="$1"; shift |
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local tmp="$out.new" |
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debug "$out" |
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cmd "$@" > "$tmp" |
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# compare |
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if [ -e "$out" ] && [ $UPDATE_DIFF ]; then |
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debug " changes:" |
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# terse |
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indent " " diff --unified=1 "$out" "$tmp" || true |
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fi |
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# deploy |
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if [ $UPDATE_NOOP ]; then |
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# cleanup |
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debug " no-op" |
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cmd rm "$tmp" |
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else |
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# commit |
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debug " deploy" |
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cmd mv "$tmp" "$out" |
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fi |
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} |
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## Compare symlink to target: |
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# |
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# check_link $lnk $tgt && do_link $lnk $tgt || ... |
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# |
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# Tests if the symlink exists, and the target matches. |
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# Fails if the target does not exist. |
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function check_link { |
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local lnk="$1" |
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local tgt="$2" |
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[ ! -e "$tgt" ] && fail "$tgt: target does not exist" |
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[ ! -e "$lnk" ] || [ $(readlink "$lnk") != "$tgt" ] |
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} |
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## Update symlink to point to target: |
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# |
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# do_link $lnk $tgt |
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# |
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function do_link { |
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local lnk="$1" |
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local tgt="$2" |
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cmd ln -sf "$tgt" "$lnk" |
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} |
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## Read include paths from file |
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function read_zone_includes { |
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cmd sed -n -E 's/^\$INCLUDE\s+"(.+)"/\1/p' "$@" |
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} |
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||
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## (cached) include paths for zone file |
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function zone_includes { |
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local cache="$1" |
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local src="$2" |
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local dir="$3" |
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if [ ! -e "$cache" -o "$cache" -ot "$src" ]; then |
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read_zone_includes "$src" > "$cache" |
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fi |
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while read include; do |
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echo -n "$dir/$include " |
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done < "$cache" |
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} |