Landon Curt Noll
54fdd0f39c
Updated `bugs.html` to reflect the fix of all known bugs in `2000/dlowe`. Added thank you to John Dalbec in `thanks-for-help.md`. Added processing of "%%REPO_TOP_URL%%" tokens to `bin/subst.default.sh`. Updated `find-missing-links.sh` to not falsely report missing links when a "%%REPO_TOP_URL%%" token is used. Changed `bin/subst.default.sh` VERSION from "1.3.2 2024-08-05" to "1.4.0 2025-04-16". Changed `bin/find-missing-links.sh` VERSION from "1.1.1 2024-04-28" to "1.2.0 2025-04-16". Due to a `pandoc(1)` bug fix, `2011/fredriksson/index.html` and `2012/kang/index.html` were modified. The bug fix removed extraneous whitespace that was previously introduced into HTML under certain situations. These 2 changes do **NOT** impact the way web browsers render these pages, however. Updated sitemap. Tested the above via `make www gen_status gen_sitemap timestamp` on macOS.
545 lines
15 KiB
Bash
Executable File
545 lines
15 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# find-missing-links.sh - find markdown links to missing local files
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#
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# Find all markdown links to local files that do not exist.
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#
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# This tool does **NOT** check that a remote URL exists.
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# This tool only checks on links to local files.
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#
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# This tool does **NOT** check links in a given place in a file.
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# This tool only checks that local files linked by markdown exist.
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#
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# This tool does **NOT** check HTML file links.
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# This tool only checks markdown based links.
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#
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# NOTE: If the markdown link is malformed, this tool
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# might generate an error about a file that does exist.
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# If this tool claims that a file is missing that does exist,
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# look for a malformed markdown line and/or use of markdown
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# that is **NOT** an IOCCC markdown best practice.
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#
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# See the IOCCC markdown best practices file, markdown.html, for more info.
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#
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# Copyright (c) 2024 by Landon Curt Noll. All Rights Reserved.
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#
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# Permission to use, copy, modify, and distribute this software and
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# its documentation for any purpose and without fee is hereby granted,
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# provided that the above copyright, this permission notice and text
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# this comment, and the disclaimer below appear in all of the following:
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#
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# supporting documentation
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# source copies
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# source works derived from this source
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# binaries derived from this source or from derived source
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#
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# LANDON CURT NOLL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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# INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
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# EVENT SHALL LANDON CURT NOLL BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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# CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
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# USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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# PERFORMANCE OF THIS SOFTWARE.
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#
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# chongo (Landon Curt Noll, http://www.isthe.com/chongo/index.html) /\oo/\
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#
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# Share and enjoy! :-)
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# firewall - run only with a bash that is version 5.1.8 or later
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#
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# The "/usr/bin/env bash" command must result in using a bash that
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# is version 5.1.8 or later.
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#
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# We could relax this version and insist on version 4.2 or later. Versions
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# of bash between 4.2 and 5.1.7 might work. However, to be safe, we will require
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# bash version 5.1.8 or later.
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#
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# WHY 5.1.8 and not 4.2? This safely is done because macOS Homebrew bash we
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# often use is "version 5.2.26(1)-release" or later, and the RHEL Linux bash we
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# use often use is "version 5.1.8(1)-release" or later. These versions are what
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# we initially tested. We recommend you either upgrade bash or install a newer
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# version of bash and adjust your $PATH so that "/usr/bin/env bash" finds a bash
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# that is version 5.1.8 or later.
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#
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# NOTE: The macOS shipped, as of 2024 March 15, a version of bash is something like
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# bash "version 3.2.57(1)-release". That macOS shipped version of bash
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# will NOT work. For users of macOS we recommend you install Homebrew,
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# (see https://brew.sh), and then run "brew install bash" which will
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# typically install it into /opt/homebrew/bin/bash, and then arrange your $PATH
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# so that "/usr/bin/env bash" finds "/opt/homebrew/bin" (or whatever the
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# Homebrew bash is).
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#
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# NOTE: And while MacPorts might work, we noticed a number of subtle differences
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# with some of their ported tools to suggest you might be better off
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# with installing Homebrew (see https://brew.sh). No disrespect is intended
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# to the MacPorts team as they do a commendable job. Nevertheless we ran
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# into enough differences with MacPorts environments to suggest you
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# might find a better experience with this tool under Homebrew instead.
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#
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if [[ -z ${BASH_VERSINFO[0]} ||
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${BASH_VERSINFO[0]} -lt 5 ||
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${BASH_VERSINFO[0]} -eq 5 && ${BASH_VERSINFO[1]} -lt 1 ||
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${BASH_VERSINFO[0]} -eq 5 && ${BASH_VERSINFO[1]} -eq 1 && ${BASH_VERSINFO[2]} -lt 8 ]]; then
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echo "$0: ERROR: bash version needs to be >= 5.1.8: $BASH_VERSION" 1>&2
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echo "$0: Warning: bash version >= 4.2 might work but 5.1.8 was the minimum we tested" 1>&2
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echo "$0: Notice: For macOS users: install Homebrew (see https://brew.sh), then run" \
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""brew install bash" and then modify your \$PATH so that \"#!/usr/bin/env bash\"" \
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"finds the Homebrew installed (usually /opt/homebrew/bin/bash) version of bash" 1>&2
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exit 4
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fi
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# setup bash file matching
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#
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# We must declare arrays with -ag or -Ag, and we need loops to "export" modified variables.
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# This requires a bash with a version 4.2 or later. See the larger comment above about bash versions.
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#
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shopt -s nullglob # enable expanded to nothing rather than remaining unexpanded
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shopt -u failglob # disable error message if no matches are found
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shopt -u dotglob # disable matching files starting with .
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shopt -u nocaseglob # disable strict case matching
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shopt -u extglob # enable extended globbing patterns
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shopt -s globstar # enable ** to match all files and zero or more directories and subdirectories
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# set variables referenced in the usage message
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#
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export VERSION="1.2.0 2025-04-16"
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NAME=$(basename "$0")
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export NAME
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export V_FLAG=0
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GIT_TOOL=$(type -P git)
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export GIT_TOOL
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if [[ -z "$GIT_TOOL" ]]; then
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echo "$0: FATAL: git tool is not installed or not in \$PATH" 1>&2
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exit 5
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fi
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"$GIT_TOOL" rev-parse --is-inside-work-tree >/dev/null 2>&1
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status="$?"
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if [[ $status -eq 0 ]]; then
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TOPDIR=$("$GIT_TOOL" rev-parse --show-toplevel)
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fi
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export TOPDIR
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# usage
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#
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export USAGE="usage: $0 [-h] [-v level] [-V] [-d topdir]
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-h print help message and exit
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-v level set verbosity level (def level: 0)
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-V print version string and exit
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-d topdir set topdir (def: $TOPDIR)
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Exit codes:
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0 all OK
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1 missing links found
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2 -h and help string printed or -V and version string printed
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3 command line error
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4 bash version is too old
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5 git not installed or not in \$PATH
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6 problems found with or in the topdir or topdir/YYYY directory
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7 problems found with or in the entry topdir/YYYY/dir directory
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>= 10 internal error
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$NAME version: $VERSION"
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# fast_dirname - perform dirname(1) without calling a command
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#
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# This is very similar with dirname(1) except it is much faster.
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#
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# usage:
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# fast_dirname path_name
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#
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# path to obtain the directory from
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#
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function fast_dirname
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{
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local PATH_NAME; # path_name argument to be modified
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# parse args
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#
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if [[ $# -ne 1 ]]; then
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echo "$0: ERROR: in fast_dirname: debug_parameters requires 1 arg, found: $#" 1>&2
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exit 10
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fi
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PATH_NAME="$1"
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# firewall - reject empty paths
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#
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if [[ -z $PATH_NAME ]]; then
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echo "$0: ERROR: in fast_dirname: pathname arg is empty" 1>&2
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exit 11
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fi
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# reduce multiple consecutive /'s to just /
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#
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while :; do
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case "$PATH_NAME" in
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*//*) PATH_NAME="${PATH_NAME//\/\//\/}" ;;
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*) break ;;
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esac
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done
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# trim any trailing /
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#
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PATH_NAME=${PATH_NAME%%/}
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# case: if we only had /'s return /
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#
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if [[ -z "$PATH_NAME" ]]; then
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echo '/'
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return;
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fi
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# case: PATH_NAME is an absolute path starting with /
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#
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case "$PATH_NAME" in
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/*) echo "${PATH_NAME%/*}"; return ;;
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*/*) echo "${PATH_NAME%/*}"; return ;;
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*) echo '.'; return ;;
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esac
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}
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# parse command line
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#
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while getopts :hv:Vd:nN flag; do
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case "$flag" in
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h) echo "$USAGE" 1>&2
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exit 2
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;;
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v) V_FLAG="$OPTARG"
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;;
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V) echo "$VERSION"
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exit 2
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;;
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d) TOPDIR="$OPTARG"
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;;
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\?) echo "$0: ERROR: invalid option: -$OPTARG" 1>&2
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echo 1>&2
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echo "$USAGE" 1>&2
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exit 3
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;;
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:) echo "$0: ERROR: option -$OPTARG requires an argument" 1>&2
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echo 1>&2
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echo "$USAGE" 1>&2
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exit 3
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;;
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*) echo "$0: ERROR: unexpected value from getopts: $flag" 1>&2
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echo 1>&2
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echo "$USAGE" 1>&2
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exit 3
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;;
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esac
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done
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#
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# remove the options
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#
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shift $(( OPTIND - 1 ));
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#
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if [[ $V_FLAG -ge 5 ]]; then
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echo "$0: debug[5]: file argument count: $#" 1>&2
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fi
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#
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# verify arg count and parse args
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#
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export TOOL
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case "$#" in
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0) ;;
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*) echo "$0: ERROR: expected 0 args, found: $#" 1>&2
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echo "$USAGE" 1>&2
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exit 3
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;;
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esac
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#
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if [[ $V_FLAG -ge 1 ]]; then
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echo "$0: debug[1]: start scan for missing links" 1>&2
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fi
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# print running info if verbose
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#
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# If -v 3 or higher, print exported variables in order that they were exported.
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#
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if [[ $V_FLAG -ge 3 ]]; then
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echo "$0: debug[3]: VERSION=$VERSION" 1>&2
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echo "$0: debug[3]: NAME=$NAME" 1>&2
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echo "$0: debug[3]: V_FLAG=$V_FLAG" 1>&2
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echo "$0: debug[3]: GIT_TOOL=$GIT_TOOL" 1>&2
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echo "$0: debug[3]: TOPDIR=$TOPDIR" 1>&2
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fi
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# cd to topdir
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#
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if [[ ! -e $TOPDIR ]]; then
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echo "$0: ERROR: cannot cd to non-existent path: $TOPDIR" 1>&2
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exit 6
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fi
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if [[ ! -d $TOPDIR ]]; then
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echo "$0: ERROR: cannot cd to a non-directory: $TOPDIR" 1>&2
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exit 6
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fi
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export CD_FAILED
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if [[ $V_FLAG -ge 5 ]]; then
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echo "$0: debug[5]: about to: cd $TOPDIR" 1>&2
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fi
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cd "$TOPDIR" || CD_FAILED="true"
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if [[ -n $CD_FAILED ]]; then
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echo "$0: ERROR: cd $TOPDIR failed" 1>&2
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exit 6
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fi
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if [[ $V_FLAG -ge 3 ]]; then
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echo "$0: debug[3]: now in directory: $(/bin/pwd)" 1>&2
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fi
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# create a temporary missing link error message file
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#
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export TMP_MISSING_LINK=".tmp.$NAME.MISSING_LINK.$$.tmp"
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if [[ $V_FLAG -ge 3 ]]; then
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echo "$0: debug[3]: temporary missing link error message file: $TMP_MISSING_LINK" 1>&2
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fi
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if [[ -z $NOOP ]]; then
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trap 'rm -f $TMP_MISSING_LINK; exit' 0 1 2 3 15
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rm -f "$TMP_MISSING_LINK"
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if [[ -e $TMP_MISSING_LINK ]]; then
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echo "$0: ERROR: cannot remove temporary missing link error message file: $TMP_MISSING_LINK" 1>&2
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exit 12
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fi
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:> "$TMP_MISSING_LINK"
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if [[ ! -e $TMP_MISSING_LINK ]]; then
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echo "$0: ERROR: cannot create temporary missing link error message file: $TMP_MISSING_LINK" 1>&2
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exit 13
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fi
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elif [[ $V_FLAG -ge 3 ]]; then
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echo "$0: debug[3]: because of -n, temporary missing link error message file is not used: $TMP_MISSING_LINK" 1>&2
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fi
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# collect markdown links
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#
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# Here be extended regular expression magic dragons! :-)
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#
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# We will try to explain, as best as we can, these complex regular expressions.
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#
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# After grep of markdown files (files in sorted dictionary order) for markdown line lines, we sed:
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#
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# # remove any "[some string]" that is not immediately followed by "("
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#
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# -e 's/\[[^]]*\]([^(])/\1/' \
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#
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# # remove any trailing "[followed by text without a closing bracket"
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#
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# -e 's/\[[^]]*$//' \
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#
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# Then processing the second file (after the filename field) we sed:
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#
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# # remove any leading "..non-[-stuff..["
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#
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# -e 's/^[^[]()+\[/[/' \
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#
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# # replace "beginning text stuff](" with "[text stuff]("
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# # because the previous line might have ended with "[beginning"
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#
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# -e 's/^([^][]*\]\()/[\1/g' \
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#
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# # remove any "[..non-]-stuff..][..more-non-]-stuff..]"
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#
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# -e 's/(\[[^][]*\])+([^(])/\2/g' \
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#
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# # remove any non-link before the first "[some string](path)"
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#
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# -e 's/^[^][]+(\[[^]]*\]\([^(]*\))/\1/' \
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#
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# # remove any final "[..non-]-stuff..$"
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#
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# -e 's/\[[^]]*$//' \
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#
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# # remove any final "(..non-)-stuff..)..non-[-stuff.."
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#
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# -e 's/(\([^)]*\))[^[]*$/\1/' \
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#
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# # remove any trailing non-[-text after the final "[some string](path)"
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#
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# -e 's/(\[[^]]*\]\([^(]*\))[^[]+$/\1/' \
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#
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# # replace ")..non-open-bracket-stuff.[" with ") ["
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#
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# -e 's/\)[^[]*\[/) [/g' \
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#
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# # replace "[some string](apath) [other string](bpath)" with two lines:
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# #
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# # "[some string](apath)"
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# # "[other string](bpath)"
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#
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# -e 's/(\[[^]]*\]\([^(]*\))/\1\n/g' \
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#
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# # remove blank and empty lines
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#
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# -e '/^\s*$/d' \
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#
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# Then pipe the lines into another sed:
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#
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# # replace multiple space with a single space
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#
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# -e 's/ +/ /g' \
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#
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# # remove the leading "[pseudo title]("
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#
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# -e 's/\[[^]]*\]\(//' \
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#
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# # remove trailing ")":
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#
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# -e 's/\)$//' \
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#
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# # remove and trailing #name
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#
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# -e 's/#.*$//' \
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#
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# # remove any leading whitespace
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#
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# -e 's/^ //' \
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#
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# # remove blank and empty lines
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#
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# -e '/^\s*$/d' \
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#
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# # delete all http: and https: URLs
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#
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# -e '/^https?:/d' \
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#
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# # delete all mailto: URLs
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#
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# -e '/^mailto:/d' \
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#
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# # add current directory in front of absolute paths
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#
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# -e "s;^/;$PWD;" \
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#
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# # add current directory followed by / in front of relative paths
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#
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# -e "s;^([^/]);$PWD/\1;" \
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#
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# # convert "%%REPO_URL%%/" into TOPDIR
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#
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# -e "s;%%REPO_URL%%/*;$TOPDIR/;" \
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#
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# # delete all lines containing %%REPO_TOP_URL%%
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#
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# We cannot check as local files, URLs that generally under GitHub
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# However paths under REPO_URL=$REPO_TOP_URL/blob/master DO map to $TOPDIR,
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# so we only convert %%REPO_URL%% to $TOPDIR, but NOT %%REPO_TOP_URL%%.
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#
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# -e '/%%REPO_TOP_URL%%/d' \
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#
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# # convert "%%DOCROOT_SLASH%%" into TOPDIR
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#
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# -e "s;%%DOCROOT_SLASH%%/*;$TOPDIR/;" \
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#
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# # relative paths have the directory of the markdown file added to them
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#
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# -e "s;^([^/]);$TOPDIR/$MD_DIR/\1;" \
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#
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# # delete all lines containing "%%TOKEN%%" as this is a just a test/example token
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#
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# -e '/%%TOKEN%%/d' \
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#
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# At this point in the pipe, we have absolute /-based paths to markdown linked local files.
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# We test if those file exist, and if not report a problem in the form:
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#
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# # Missing file linked in: markdown_file_name.md
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# # Markdown line: ..the markdown line containing the line..
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# /missing/filename
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#
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find . -name '*.md' ! -name markdown.md ! -path './tmp/*' ! -path './NOTES/*' -print |
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LANG=C sort -d |
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xargs grep '\]([^)][^)]*)' /dev/null |
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sed -E \
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-e 's;^\.\/;;' \
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-e 's/^([^:]+):\s*/\1 /' \
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while read -r MD_PATH MD_LINE; do
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# note directory containing the markdown file
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#
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MD_DIR=$(fast_dirname "$MD_PATH")
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export MD_DIR
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# extract markdown parts from the given markdown file
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#
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echo "$MD_LINE" |
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sed -E \
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-e 's/^[^[]()+\[/[/' \
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-e 's/^([^][]*\]\()/[\1/g' \
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-e 's/(\[[^][]*\])+([^(])/\2/g' \
|
|
-e 's/^[^][]+(\[[^]]*\]\([^(]*\))/\1/' \
|
|
-e 's/\[[^]]*$//' \
|
|
-e 's/(\([^)]*\))[^[]*$/\1/' \
|
|
-e 's/(\[[^]]*\]\([^(]*\))[^[]+$/\1/' \
|
|
-e 's/\)[^[]*\[/) [/g' \
|
|
-e 's/(\[[^]]*\]\([^(]*\))/\1\n/g' \
|
|
-e '/^\s*$/d' \
|
|
|
|
|
sed -E \
|
|
-e 's/ +/ /g' \
|
|
-e 's/\[[^]]*\]\(//' \
|
|
-e 's/\)$//' \
|
|
-e 's/#.*$//' \
|
|
-e 's/^ //' \
|
|
-e '/^\s*$/d' \
|
|
-e '/^https?:/d' \
|
|
-e '/^mailto:/d' \
|
|
-e "s;%%REPO_URL%%/*;$TOPDIR/;" \
|
|
-e '/%%REPO_TOP_URL%%/d' \
|
|
-e "s;%%DOCROOT_SLASH%%/*;$TOPDIR/;" \
|
|
-e "s;^([^/]);$TOPDIR/$MD_DIR/\1;" \
|
|
-e '/%%TOKEN%%/d' \
|
|
|
|
|
|
|
# write to stderr, missing file messages
|
|
#
|
|
# The absolute path is written to stderr, while
|
|
# info about the possible cause is written to stderr with lines starting with #
|
|
#
|
|
# We output exact 4 lines per missing link.
|
|
#
|
|
while read -r ABS_LOCAL_FILE_PATH; do
|
|
if [[ ! -e $ABS_LOCAL_FILE_PATH ]]; then
|
|
echo "# Missing file linked in: $MD_PATH"
|
|
echo "# Markdown line: $MD_LINE"
|
|
echo "$ABS_LOCAL_FILE_PATH"
|
|
echo
|
|
fi
|
|
done
|
|
done > "$TMP_MISSING_LINK"
|
|
|
|
|
|
# count the missing links
|
|
#
|
|
MISSING_LINK_COUNT=$(wc -l < "$TMP_MISSING_LINK" | tr -d ' ')
|
|
export MISSING_LINK_COUNT
|
|
((MISSING_LINK_COUNT=MISSING_LINK_COUNT/4))
|
|
|
|
|
|
# report on any missing links
|
|
#
|
|
if [[ -s $TMP_MISSING_LINK ]]; then
|
|
sed -e "s;^$TOPDIR/;;" "$TMP_MISSING_LINK" 1>&2
|
|
fi
|
|
|
|
|
|
# All Done!!! All Done!!! -- Jessica Noll, Age 2
|
|
#
|
|
if [[ -s $TMP_MISSING_LINK ]]; then
|
|
echo "$0: ERROR: $MISSING_LINK_COUNT missing link(s) found" 1>&2
|
|
exit 1
|
|
fi
|
|
if [[ $V_FLAG -ge 1 ]]; then
|
|
echo "$0: debug[1]: $MISSING_LINK_COUNT missing link(s) found" 1>&2
|
|
fi
|
|
exit 0
|