mirror of https://github.com/restic/restic.git
124 lines
2.9 KiB
Awk
124 lines
2.9 KiB
Awk
# Copyright 2017 Google Inc. All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
# snipmd inserts code snippets from Go source files into a markdown file.
|
|
#
|
|
# Call with one or more .go files and a .md file:
|
|
#
|
|
# awk -f snipmd.awk foo.go bar.go template.md
|
|
#
|
|
# In the Go files, start a snippet with
|
|
# //[ NAME
|
|
# and end it with
|
|
# //]
|
|
#
|
|
# In the markdown, write
|
|
# [snip]:# NAME
|
|
# to insert the snippet NAME just below that line.
|
|
# If there is already a code block after the [snip]:# line, it will be
|
|
# replaced, so a previous output can be used as input.
|
|
#
|
|
# The following transformations are made to the Go code:
|
|
# - The first tab of each line is removed.
|
|
# - Trailing blank lines are removed.
|
|
# - `ELLIPSIS` and `_ = ELLIPSIS` are replaced by `...`
|
|
|
|
|
|
/^[ \t]*\/\/\[/ { # start snippet in Go file
|
|
if (inGo()) {
|
|
if ($2 == "") {
|
|
die("missing snippet name")
|
|
}
|
|
curSnip = $2
|
|
next
|
|
}
|
|
}
|
|
|
|
/^[ \t]*\/\/]/ { # end snippet in Go file
|
|
if (inGo()) {
|
|
if (curSnip != "") {
|
|
# Remove all but one trailing newline.
|
|
gsub(/\n+$/, "\n", snips[curSnip])
|
|
curSnip = ""
|
|
next
|
|
} else {
|
|
die("//] without corresponding //[")
|
|
}
|
|
}
|
|
}
|
|
|
|
ENDFILE {
|
|
if (curSnip != "") {
|
|
die("unclosed snippet: " curSnip)
|
|
}
|
|
}
|
|
|
|
# Skip code blocks in the input that immediately follow [snip]:# lines,
|
|
# because we just inserted the snippet. Supports round-tripping.
|
|
/^```go$/,/^```$/ {
|
|
if (inMarkdown() && afterSnip) {
|
|
next
|
|
}
|
|
}
|
|
|
|
# Matches every line.
|
|
{
|
|
if (curSnip != "") {
|
|
line = $0
|
|
# Remove initial tab, if any.
|
|
if (line ~ /^\t/) {
|
|
line = substr(line, 2)
|
|
}
|
|
# Replace ELLIPSIS.
|
|
gsub(/_ = ELLIPSIS/, "...", line)
|
|
gsub(/ELLIPSIS/, "...", line)
|
|
|
|
snips[curSnip] = snips[curSnip] line "\n"
|
|
} else if (inMarkdown()) {
|
|
afterSnip = 0
|
|
# Copy .md to output.
|
|
print
|
|
}
|
|
}
|
|
|
|
$1 ~ /\[snip\]:#/ { # Snippet marker in .md file.
|
|
if (inMarkdown()) {
|
|
# We expect '[snip]:#' to be followed by '(NAME)'
|
|
if ($2 !~ /\(.*\)/) {
|
|
die("bad snip spec: " $0)
|
|
}
|
|
name = substr($2, 2, length($2)-2)
|
|
if (snips[name] == "") {
|
|
die("no snippet named " name)
|
|
}
|
|
printf("```go\n%s```\n", snips[name])
|
|
afterSnip = 1
|
|
}
|
|
}
|
|
|
|
|
|
function inMarkdown() {
|
|
return match(FILENAME, /\.md$/)
|
|
}
|
|
|
|
function inGo() {
|
|
return match(FILENAME, /\.go$/)
|
|
}
|
|
|
|
|
|
function die(msg) {
|
|
printf("%s:%d: %s\n", FILENAME, FNR, msg) > "/dev/stderr"
|
|
exit 1
|
|
}
|