Ревізії Semver range validator in bash (using sed, grep, and bc)

anthony ревизій цього gist 1740032086. До ревизії

1 file changed, 143 insertions

semver.sh(файл створено)

		@@ -0,0 +1,143 @@
1	+	#!/bin/bash
2	+
3	+	# set -x
4	+
5	+	# Stupid Simple Semver range validator
6	+	# (no build metadata and no prereleases, and no multiple ranges (\|\|))
7	+
8	+	# Prints a list of versions that match a semver range
9	+	# ./semver.sh "range" version version version...
10	+
11	+	# ./semver.sh ">=0.10.32 <7" 0.10.32 6.7.0 6.9.2 6.9.4 6.10.0 7.3.0 7.4.0 \| xargs
12	+	# 0.10.32 6.7.0 6.9.2 6.9.4 6.10.0
13	+
14	+	# ./semver.sh "^6.9.4" 0.10.32 6.7.0 6.9.2 6.9.4 6.10.0 7.3.0 7.4.0 \| xargs
15	+	# 6.9.4 6.10.0
16	+
17	+	# ./semver.sh "~6.9.4" 0.10.32 6.7.0 6.9.2 6.9.4 6.10.0 7.3.0 7.4.0 \| xargs
18	+	# 6.9.4
19	+
20	+	# TODO: error handling, validation
21	+
22	+	# Basic concept:
23	+	# 1.x.x = ^1.0.0 = (>=1.0.0 <2.0.0)
24	+	# 1.1.x = ~1.1.0 = (>=1.1.0 <1.2.0)
25	+	# ^1.x.x = ^1.0.0
26	+	# ~1.x.x = ~1.0.0
27	+
28	+	SEMVER_RANGE="$1"; shift
29	+	SEMVER_AVAILABLE_VERSIONS="$@"
30	+
31	+	SEMVER_RE_COMPARATOR='[<>=\^~]*'
32	+	SEMVER_RE_VERSION='[0-9x\.]+'
33	+
34	+	# Takes a range with multiple comparisons, and splits it into lines
35	+	# >=1.2.3 < 3
36	+	# >=1.2.3
37	+	# < 3
38	+	semver_split_range () {
39	+	egrep -o "($SEMVER_RE_COMPARATOR\s*$SEMVER_RE_VERSION)"
40	+	}
41	+
42	+	# Hacky way to make versions comparable
43	+	# Won't work if version numbers are over 100k'
44	+	# 1.2.3 => 000001000002000003
45	+	semver_to_number () {
46	+	tr "." " " \| xargs printf "%06g"
47	+	}
48	+
49	+	# Convert a range part into a set of comparison lines processable by bc
50	+	# ^1.2.3 => >=1.2.3 <2.0.0
51	+	# >= 000001000002000003
52	+	# < 000002000000000000
53	+	semver_create_comparator () {
54	+	local COMPARATOR="$(egrep -o "^$SEMVER_RE_COMPARATOR" <<< "$1")"
55	+	local VERSION="$(egrep -o "$SEMVER_RE_VERSION$" <<< "$1")"
56	+	local VP
57	+
58	+	local ZERO_OR_X
59	+	if [[ -n "$COMPARATOR" ]]; then
60	+	ZERO_OR_X="0"
61	+	else
62	+	ZERO_OR_X="x"
63	+	fi
64	+
65	+	# Append either 0's or x's to the version, depending on comparator presence
66	+	# 4 => 4.x.x
67	+	# ^4 => 4.0.0
68	+	while [[ "$(egrep -o "\." <<< "$VERSION" \| wc -l)" -lt "2" ]]; do
69	+	VERSION="$VERSION.$ZERO_OR_X"
70	+	done
71	+
72	+	# If comparator is not defined (1.x.x, 1.x, 1, 1.0.x, 1.0.0 etc),
73	+	# assign one based on the number of x's
74	+	# 1.x.x => ^ 1.x.x
75	+	# 1.0.x => ~ 1.0.x
76	+	# 1.0.0 => == 1.0.0
77	+	if [[ -z "$COMPARATOR" ]]; then
78	+	if [[ "$VERSION" =~ \.x\.x ]]; then
79	+	COMPARATOR="^"
80	+	elif [[ "$VERSION" =~ \.x ]]; then
81	+	COMPARATOR="~"
82	+	else
83	+	COMPARATOR="=="
84	+	fi
85	+	fi
86	+
87	+	# Finally, replace all the x's with 0s'
88	+	# ^ 1.x.x => ^ 1.0.0
89	+	VERSION=$(sed -E 's\|\.x\|\.0\|g' <<< "$VERSION")
90	+
91	+	# Convert the ~,^ into proper >=, < comparator ranges
92	+	# ^1.0.0 = (>=1.0.0 <2.0.0)
93	+	# ~1.0.0 = (>=1.0.0 <1.1.0)
94	+	if [[ "$COMPARATOR" =~ \^\|~ ]]; then
95	+	IFS="." read -ra VP <<< "$VERSION"
96	+	if [[ "$COMPARATOR" == "~" ]]; then
97	+	# Up the minor; 0 the patch
98	+	VP[1]=$(( ${VP[1]} + 1 ))
99	+	VP[2]=0
100	+	else
101	+	# Up the major; 0 the minor and patch
102	+	VP[0]=$(( ${VP[0]} + 1 ))
103	+	VP[1]=0
104	+	VP[2]=0
105	+	fi
106	+	COMPARATOR=">="
107	+	echo "< $(semver_to_number <<< "${VP[0]}.${VP[1]}.${VP[2]}")"
108	+	fi
109	+
110	+	echo "$COMPARATOR $(semver_to_number <<< "$VERSION")"
111	+	}
112	+
113	+	# Create all of the comparator lines processable by bc for the entire semver range
114	+	# TODO: make it break for invalid ranges
115	+	semver_create_comparators () {
116	+	local R
117	+
118	+	while read R; do
119	+	semver_create_comparator "$R"
120	+	done < <(semver_split_range <<< "$SEMVER_RANGE")
121	+	}
122	+
123	+	# Run a semver against all comparisons
124	+	# If all conditions pass, return success
125	+	semver_compare () {
126	+	local C
127	+
128	+	while read C; do
129	+	[[ "$MATCH" == "false" ]] && break
130	+	if [[ "$(bc <<< "$1 $C")" == "0" ]]; then
131	+	return 1
132	+	fi
133	+	done < <(echo -e "$V_COMPARATORS")
134	+	}
135	+
136	+	# Precompute the range into bc-processable comparator strings
137	+	V_COMPARATORS="$(semver_create_comparators)"
138	+
139	+	# Compare each provided version against the provided range, and print
140	+	# the ones that succeed
141	+	for A in $SEMVER_AVAILABLE_VERSIONS; do
142	+	semver_compare "$(semver_to_number <<< "$A")" && echo $A
143	+	done

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